Industrial sodium tripolyphosphate (STPP)

Sodium tripolyphosphate is an indispensable excellent additive in detergents, and the content in most detergents is 10-50%. Its main functions can be summarized as follows.
(1) chelation of metal ions: daily washing water generally contains hard metal ions (mainly Ca2+ and Mg2+). In the washing process, they will form insoluble metal salts with soap or active substances in detergent, thus not only increasing the consumption of detergent, but also making the washed fabric have unpleasant dark gray. Sodium tripolyphosphate has excellent properties of chelating hard metal ions, thus eliminating the adverse effects of these metal ions.
(2) Improve peptization, emulsification and dispersion: dirt often contains human secretions (mainly proteins and fatty substances), as well as sand and dust from outside. However, sodium tripolyphosphate has swelling and solubilizing effects on protein and plays a role in peptization. For fatty substances, it can promote emulsification. It can disperse and suspend solid particles.
(3) buffering effect: sodium tripolypHosphate has a large alkaline buffering effect, keeping the ph value of the washing solution at about 9.4, thus being beneficial to the removal of acidic dirt.
(4) Anti-caking effect: Powdered synthetic detergent has hygroscopicity. If it is stored in a place with high humidity, caking will occur. Caked detergents are extremely inconvenient to use. However, the hexahydrate formed after sodium tripolyphosphate absorbs water has the characteristic of dryness. When there is a large amount of sodium tripolyphosphate in the detergent formula, it can prevent agglomeration caused by moisture absorption and keep the synthetic detergent dry and granular.
Sodium tripolyphosphate is prepared by neutralizing phosphoric acid with soda ash to form sodium orthophosphate, and then condensing. There are two methods to produce phosphoric acid: wet method and thermal method. Wet process is to react phosphate rock with inorganic acid (usually sulfuric acid, which has recently been used hydrochloric acid), then extract and refine to obtain phosphoric acid. The thermal method is to roast phosphate rock together with coke and silica in an electric furnace, reduce phosphate rock to phosphorus, and then oxidize and hydrate to obtain phosphoric acid.
The process of preparing sodium tripolyphosphate from orthophosphate is relatively simple, with short process and convenient control operation. There are mainly two methods.
(1) spray drying-converter polycondensation two-stage method: the spray dryer is a cylinder, the upper part of which is connected with a horizontal burner with a gas nozzle. Gas with a temperature of 400-500 deg c is introduced into the upper part of the spray drying tower through a burner, and meanwhile, orthophosphate solution is injected by a high-pressure (4.2MPa) pump. Dried products containing less than 5% water are continuously taken out from the lower part of the dryer. The orthophosphate mixture is dehydrated and polycondensed into sodium tripolyphosphate in a rotary furnace. The method is characterized in that the product does not need to be crushed, the drying efficiency of the spray dryer is high, the dried materials are uniform, and delamination phenomenon does not occur; The disadvantage is that drying and polycondensation are carried out in two stages, and dust loss is large when directly heating and dehydrating.
(2) drying-dehydration one-stage method: slurry is sprayed into a rotary furnace, and hot gas or petroleum is burnt in the furnace to heat. The annular baffle divides the furnace into a flame section and a heating section. In the heating section, the material is finally dehydrated and polycondensed to be converted into sodium tripolyphosphate. The cooling cylinder is connected with the rotary furnace as a whole, the granular products coming out of the cooling cylinder are ground in a grinding machine, and a small amount of powder brought out of the furnace is recovered in a cyclone separator. This method combines drying, dehydration and cooling in one unit equipment, which greatly simplifies the process, has high heat utilization rate, and can reduce infrastructure investment and improve working conditions.

Rising Water, Rising Ships, Opportunities for Agricultural Fertilizer IndustryPotassium

With the attention paid to agriculture in the two sessions and the first document, the market is warming up for this factor. Today, it also provides a train of thought for everyone, potash fertilizer. From a long-term perspective, potash fertilizer prices have a strong positive correlation with crude oil prices and agricultural product prices. The rise in crude oil prices has led to the rise in the prices of alternative fuels such as ethanol and biodiesel, thus pushing up the prices of agricultural products, which in turn has led to the rise in potash fertilizer prices. In addition, fuel costs account for more than 30% of potash fertilizer transportation costs. The rise in crude oil prices has directly pushed up potash fertilizer prices from the cost side.

Potash Industry Receives Repair

Potassium fertilizer is called potassium fertilizer, which is a fertilizer with potassium as the main nutrient. Potassium in plants generally accounts for 0.2% ~ 4.1% of dry matter, second only to nitrogen. Potassium participates in the activation of more than 60 enzyme systems, photosynthesis, transportation of assimilates, carbohydrate metabolism, protein synthesis and other processes during plant growth and development. It is reported that the current potash production capacity in China is mainly concentrated in Golmud in Qinghai and Lop Nur region in Xinjiang.

The potassium chloride market is still oversupplied and demand recovery is slow. Even if there are purchases, most of them are small orders. There is an upward trend in potash fertilizer abroad. The overall operating rate of domestic compound fertilizer enterprises is still at a low level, and the demand for potash fertilizer is relatively weak. At present, the procurement in the spring ploughing market is not active, which has inhibited the demand for potash fertilizer by compound fertilizer enterprises. At present, the overall operating rate of compound fertilizer enterprises is about 28.63%, an increase of 5.1 percentage points over the previous week and 7.92 percentage points over the same period last year.

In terms of wholesale prices of imported potassium chloride in various provinces, the price in Hubei province rose 83.5 yuan compared with the previous week, while the prices in Hunan and Fujian both fell compared with the previous week in 100 yuan, while the prices in other provinces remained stable. In terms of wholesale prices of domestic potassium chloride in various provinces, prices in Hubei province rose compared with the previous week. Prices in 75 yuan, Hunan, Guangdong and Zhejiang provinces dropped respectively compared with the previous week. Prices in 50 yuan, 18 yuan and 5 yuan remained stable in other provinces.

In March, Salt Lake implemented a new price. The price of 60% powder crystal of the benchmark product was lowered to 2350 yuan/ton. The rebate was 30-50 yuan/ton according to the task volume. The inventory was low and the unit was operating normally with a daily output of about 14000 tons. The construction of Qinghai small factory has not yet fully resumed and the transaction is relatively light. The quantity of goods arriving at border trade ports is reduced, the inventory is general, and some of them are futures. Therefore, the dealer’s quotation has not been adjusted for the time being, the market transaction enthusiasm is not high, and the goods are mainly delivered on demand. The price of 62% white potassium is mostly 2150-2180 yuan/ton, the dealer’s quotation is higher, and the actual transaction tends to the low-end quotation.

Waiting for the repair after the industry’s operating rate increases

Fertilizer for agricultural spring ploughing is advancing slowly, and the demand for potash fertilizer is still quiet. Lower inventory of downstream compound fertilizer enterprises and slow recovery of production lines. The domestic potassium chloride market remained weak and stable, with the overall price basically unchanged.

Judging from the port storage, there was a sharp increase in February, with the arrival volume concentrated around the Spring Festival. Up to now, the port storage has reached 2.8 million tons, with the sharp increase mainly in Lianyungang, Yingkou and Fangcheng ports. However, Yingkou still has the support of the three northeastern provinces. In previous years, Yingkou basically had a large harbor at this stage. Such a high port existed around the Spring Festival in 2016. In 2016, the construction of compound fertilizer plants began to increase from March until May, which was in line with the rebound in potash market prices. That this year will follow the construction of compound fertilizer higher and prices warmer?

From the point of view of downstream compound fertilizer plants, the plant in 2019 started to pick up slightly after February, but the speed was relatively slow compared with 2018. However, since the Spring Festival in 2018 is later than that in 2019, compared with the same period of last year, the construction of compound fertilizer is still picking up at 34% and 30% respectively. After a cold winter is full of spring flowers, we still need to pay close attention to the start-up and recovery of downstream factories so as to grasp the demand trend of the market in real time.

Flake alkaliAlkali

Product use
1. Used in papermaking and cellulose pulp production;
2. Used in soap, synthetic detergent, synthetic fatty acid production and refining of animal and vegetable fats.
3. Textile printing and dyeing industry is used as desizing agent, scouring agent and mercerizing agent for cotton cloth.
4. The chemical industry is used to produce borax, sodium cyanide, oxalic acid, phenol, etc.
5. The petroleum industry is used for refining petroleum products and for drilling mud in oil fields. It is also used in the surface treatment of alumina, zinc and copper as well as in glass, enamel, leather making, medicine, dyes and pesticides.
6. Food grade products are used as acid neutralizers in the food industry, as peeling agents for oranges and peaches, as detergents for empty bottles and cans, as well as decolorants and deodorizers.
7. It can also be used as alkaline desiccant. Caustic soda is widely used in the national economy, and many industrial departments need caustic soda. The department that uses caustic soda most is the manufacture of chemicals, followed by the manufacture of paper, aluminum, tungsten, rayon, rayon and soap. In addition, in the production of dyes, plastics, chemicals and organic intermediates, the regeneration of old rubber, the electrolysis of metal sodium and water, and the production of inorganic salts, a large amount of caustic soda is also used in the production of borax, chromium salt, manganate, phosphate, etc.
Toxic protection
It is extremely corrosive, and its solution or dust can splash onto skin, especially mucous membrane, which can produce soft scabs and penetrate deep tissues. Scar left after burns. Splash into the eye not only damages the cornea, but also damages the deep tissues of the eye. If accidentally splashed on the skin, rinse immediately with clear water for 10min;; If splashed into eyes, rinse immediately with clear water or normal saline for 15min, then add 2% novocain. Serious cases should be sent to hospital for treatment immediately. The maximum allowable concentration of caustic soda dust in the air is 0.5mg/m3. Operators must wear work clothes, masks, protective glasses, rubber gloves, rubber aprons, long rubber boots and other labor protection articles when working. Neutral and hydrophobic ointment should be applied to the skin. The production workshop should be well ventilated.
Packaging, storage and transportation
In general, 25kg three-layer plastic woven bags are used for flaky alkali, the inner layer and the outer layer are plastic woven bags, and the middle layer is plastic inner bag. The flaky alkali is classified as Class 8.2 alkaline corrosive products by Classification and Labeling of Common Hazardous Chemicals (GB 13690-92), belonging to Class 8 dangerous goods, with danger code 1823. Should be stored in a ventilated, dry warehouse or shed. Packaging containers should be complete and sealed. It shall not be stored and transported together with inflammables and acids. Pay attention to moisture-proof and rain-proof during transportation. In case of fire, water, sand and various fire extinguishers can be used to put out the fire, but firefighters should pay attention to the corrosivity of water dissolved in caustic soda.
Physico-chemical properties of the pure product are colorless transparent crystals with a relative density of 2.130. Melting point 318.4℃. Boiling point 1390℃. There are two kinds of caustic soda sold in the market: solid caustic soda and liquid caustic soda: pure solid caustic soda is white, and it is packed in blocks, sheets, rods, granules and brittle. Pure liquid caustic soda is colorless and transparent liquid. Solid caustic soda has strong hygroscopicity. Soluble in water, exothermic when dissolved, the aqueous solution is alkaline and has a feeling of satiny; Soluble in ethanol and glycerol; Insoluble in acetone and ether. It is highly corrosive and has corrosive effects on fibers, skin, glass, ceramics, etc. Reacting with metal aluminum and zinc, nonmetal boron and silicon to release hydrogen; Disproportionation reaction with halogens such as chlorine, bromine and iodine; Neutralize with acids to produce salt and water.
When storing solid sodium hydroxide, attention should be paid to sealing to prevent moisture deliquescence or carbon dioxide absorbed by exposure to air. When glass bottles are used to contain flake caustic soda or other forms of sodium hydroxide, glass stoppers are not allowed, but rubber stoppers should be used instead, because sodium hydroxide will react with silica in glass to generate sodium silicate, which causes the bottle stopper and bottle body to be hard to open.

Flake alkali

Flake alkali, chemical name sodium hydroxide and white translucent flaky solid are basic chemical raw materials and are widely used in light textile industries such as papermaking, synthetic detergent and soap, viscose fiber, rayon and cotton fabrics, pesticide, dye, rubber and chemical industries, petroleum drilling, petroleum industry for refining petroleum oil and tar, national defense industry, machinery industry, wood processing, metallurgy industry, pharmaceutical industry and urban construction. It is also used in the manufacture of chemicals, paper, soap and detergent, rayon and cellophane, alumina made from bauxite, mercerizing of textiles, water treatment, etc.1. Used in papermaking and cellulose pulp production;
2. Used in soap, synthetic detergent, synthetic fatty acid production and refining of animal and vegetable fats.
3. Textile printing and dyeing industry is used as desizing agent, scouring agent and mercerizing agent for cotton cloth.
4. The chemical industry is used to produce borax, sodium cyanide, oxalic acid, phenol, etc.
5. The petroleum industry is used for refining petroleum products and for drilling mud in oil fields. It is also used in the surface treatment of alumina, zinc and copper as well as in glass, enamel, leather making, medicine, dyes and pesticides.
6. Food grade products are used as acid neutralizers in the food industry, as peeling agents for oranges and peaches, as detergents for empty bottles and cans, as well as decolorants and deodorizers.
7. It can also be used as alkaline desiccant. Caustic soda is widely used in the national economy, and many industrial departments need caustic soda. The department that uses caustic soda most is the manufacture of chemicals, followed by the manufacture of paper, aluminum, tungsten, rayon, rayon and soap. In addition, in the production of dyes, plastics, chemicals and organic intermediates, the regeneration of old rubber, the electrolysis of metal sodium and water, and the production of inorganic salts, a large amount of caustic soda is also used in the production of borax, chromium salt, manganate, phosphate, etc.
Toxic protection
It is extremely corrosive, and its solution or dust can splash onto skin, especially mucous membrane, which can produce soft scabs and penetrate deep tissues. Scar left after burns. Splash into the eye not only damages the cornea, but also damages the deep tissues of the eye. If accidentally splashed on the skin, rinse immediately with clear water for 10min;; If splashed into eyes, rinse immediately with clear water or normal saline for 15min, then add 2% novocain. Serious cases should be sent to hospital for treatment immediately. The maximum allowable concentration of caustic soda dust in the air is 0.5mg/m3. Operators must wear work clothes, masks, protective glasses, rubber gloves, rubber aprons, long rubber boots and other labor protection articles when working. Neutral and hydrophobic ointment should be applied to the skin. The production workshop should be well ventilated.
Packaging, storage and transportation
In general, 25kg three-layer plastic woven bags are used for flaky alkali, the inner layer and the outer layer are plastic woven bags, and the middle layer is plastic inner bag. The flaky alkali is classified as Class 8.2 alkaline corrosive products by Classification and Labeling of Common Hazardous Chemicals (GB 13690-92), belonging to Class 8 dangerous goods, with danger code 1823. Should be stored in a ventilated, dry warehouse or shed. Packaging containers should be complete and sealed. It shall not be stored and transported together with inflammables and acids. Pay attention to moistureproof and rainproof during transportation. In case of fire, water, sand and various fire extinguishers can be used to put out the fire, but firefighters should pay attention to the corrosivity of water dissolved in caustic soda.
Physico-chemical properties of the pure product are colorless transparent crystals with a relative density of 2.130. Melting point 318.4℃. Boiling point 1390℃. There are two kinds of caustic soda sold in the market: solid caustic soda and liquid caustic soda: pure solid caustic soda is white, and it is packed in blocks, sheets, rods, granules and brittle. Pure liquid caustic soda is colorless and transparent liquid. Solid caustic soda has strong hygroscopicity. Soluble in water, exothermic when dissolved, the aqueous solution is alkaline and has a feeling of satiny; Soluble in ethanol and glycerin; Insoluble in acetone and ether. It is highly corrosive and has corrosive effects on fibers, skin, glass, ceramics, etc. Reacting with metal aluminum and zinc, nonmetal boron and silicon to release hydrogen; Disproportionation reaction with halogens such as chlorine, bromine and iodine; Neutralize with acids to produce salt and water.
When storing solid sodium hydroxide, attention should be paid to sealing to prevent moisture deliquescence or carbon dioxide absorbed by exposure to air. When glass bottles are used to contain flake caustic soda or other forms of sodium hydroxide, glass stoppers are not allowed, but rubber stoppers should be used instead, because sodium hydroxide will react with silica in glass to generate sodium silicate, which causes the bottle stopper and bottle body to be hard to open.

Sodium tripolyphosphate

The aqueous solution of sodium tripolyphosphate is weakly alkaline (the PH value of 1% aqueous solution is about 9.7), and it forms a suspension (similar to emulsion) in water with a PH of 4.3-14, i.e. dispersion. Sodium tripolyphosphate can also enable liquid and solid particles to be better dissolved in liquid (such as water) medium, making the solution completely transparent in appearance, like a real solution, which is solubilization. As sodium tripolyphosphate has the above unique properties, it becomes an important ideal raw material in washing powder. [3]
Production process
Sodium tripolyphosphate is prepared by neutralizing phosphoric acid with soda ash to form sodium orthophosphate, and then condensing. There are two methods to produce phosphoric acid: wet method and thermal method. Wet process is to react phosphate rock with inorganic acid (usually sulfuric acid or hydrochloric acid), then extract and refine to obtain phosphoric acid. The thermal method is to roast phosphate rock together with coke and silica in an electric furnace, reduce phosphate rock to phosphorus, and then oxidize and hydrate to obtain phosphoric acid.
The process of preparing sodium tripolyphosphate from orthophosphate is relatively simple, with short process and convenient control operation. There are mainly two methods.
(1) spray drying-converter polycondensation two-stage method: the spray dryer is a cylinder, the upper part of which is connected with a horizontal burner with a gas nozzle. Gas with a temperature of 400-500 deg c is introduced into the upper part of the spray drying tower through a burner, and meanwhile, orthophosphate solution is injected by a high-pressure (4.2MPa) pump. Dried products containing less than 5% water are continuously taken out from the lower part of the dryer. The orthophosphate mixture is dehydrated and polycondensed into sodium tripolyphosphate in a rotary furnace. The method is characterized in that the product does not need to be crushed, the spray dryer has high drying efficiency, the dried materials are uniform, and delamination phenomenon does not occur. The disadvantage is that drying and polycondensation are carried out in two stages, and dust loss is large when directly heating and dehydrating.
(2) drying-dehydration one-stage method: slurry is sprayed into a rotary furnace, and hot gas or petroleum is burnt in the furnace to heat. The annular baffle divides the furnace into a flame section and a heating section. In the heating section, the material is finally dehydrated and polycondensed to be converted into sodium tripolyphosphate. The cooling cylinder is connected with the rotary furnace as a whole, the granular products coming out of the cooling cylinder are ground in a grinding machine, and a small amount of powder brought out of the furnace is recovered in a cyclone separator. This method combines drying, dehydration and cooling in one unit equipment, which greatly simplifies the process, has high heat utilization rate, and can reduce infrastructure investment and improve working conditions.
Technical requirements
1. Appearance: white particles or powder
2. Industrial sodium tripolyphosphate shall meet the following requirements (GB9983-2004)
Project indicators
Excellent products, first-class products, qualified products
Whiteness,% ≥ 90.085.080
Phosphorus pentoxide (P2O5),% ≥ 57.0 56.5 55.0
Sodium tripolyphosphate (Na5P3O10) content,% ≥ 96.0 90.0 85.0
Water insoluble content,% ≤ 0.10 0.10 0.15
Iron content (Fe),% ≤ 0.007 0.015 0.030
PH value (1% solution) 9.2-10.0
The sieving rate of the particle size passing the 1.00mm test sieve is not less than 95%
Content analysis
(FCC law)
I preparation of reagents
  1。 Potassium acetate buffer (pH5.0) Take 78.5g of potassium acetate, dissolve it in 1000mL of water, and adjust the solution to pH5.0 with acetic acid. Add several milligrams of mercury iodide to inhibit mold growth.
  2。 Take 22.35g of potassium chloride from 0.3 mol/L potassium chloride solution, dissolve in water, add 5mL of the above potassium acetate buffer, dilute with water to 1000mL, and mix well. Add mercury iodide, mg.
  3。 Take 4.7g of potassium chloride from 0.6 mol/L potassium chloride solution, dissolve in water, add 5mL of the above potassium acetate buffer, dilute with water to 1000mL, and mix well. Add mercury iodide, mg.
  4。 Take 74.5g of potassium chloride from 1mol/L potassium chloride solution, dissolve it with water, add 5mL of the above potassium acetate buffer, dilute it with water to 1000mL, and mix. Add mercury iodide, mg.
II. Chromatographic Columns
Using a standard chromatographic column with a length of 20-40 cm and an inner diameter of 20-28 mm, seal a coarse-hole sintered plate. If there are no stoppers respectively, connect a short polyethylene hose at the outlet of the column, and then connect a stopcock with an aperture of 3-4 mm.
III. Operation
Close the stopcock, fill the space between the sintered plate and the stopcock with water, and connect a vacuum line to the stopcock. Using 100-200 mesh or 200-400 mesh strong alkali anion exchange resin (Dowex 18) or styrene/divinylbenzene ion exchange resin of similar grade, and water according to the ratio of 1:1 to make each slurry. Decant the extremely fine particles and foam, and repeat this for 2-3 times, or until there is no fine suspended matter or foam. Fill the chromatographic column with slurry, open the stopcock, and vacuum the tree bed until the water level is slightly higher than the top of the resin bed, then immediately close the stopcock. Under no circumstances should the water level be lower than the resin level. This is repeated until the resin is 15cm higher than the sintered plate. Take a piece of filter paper closely attached with glass fiber and place it on the top of the resin bed, then take a perforated polyethylene dish and place it on the filter paper. A layer of loose glass wool can also be installed on the top of the resin bed. Plug the top of the column with a rubber stopper, insert a 7.6cm long capillary tube (inner diameter 1.5mm, outer diameter 7tnm) in the center of the rubber stopper, and extend about 12mrn below the stopper. Connect the capillary tube to the lower tube of a 500mL separatory funnel with a length of polyethylene hose. Place the separatory funnel in the iron ring above the column. Close all stoppers and add 100mL of water to the separatory funnel to wash the chromatographic column. First unscrew the stopcock of the separatory funnel, and then release the stopcock of the chromatographic column at a flow rate of about 5mL/min. When the separatory funnel is completely emptied, first close the column stopcock, and then close the separatory funnel stopcock.
Accurately weigh about 500mg of test sample that has been dried at 105℃ for 4 hours, put it into a 250mL volumetric flask, dissolve it with water and mix it after constant volume. Take 10.0mL of this solution and transfer it to the separatory funnel. Open the two stoppers to allow the solution to flow into the chromatographic column. Rinse the separatory funnel with water and discard the eluate.
370mL of 0.3mol/L potassium chloride solution was added to a separatory funnel, and the solution was passed through a chromatographic column, and the eluate was discarded. Add 250mL of 0.6mol/L potassium chloride solution to the separatory funnel, let the solution pass through the chromatographic column, and collect the eluate in a 400mL beaker. (In order to ensure a clean chromatographic column during the next round of operation, 100mL of 1mol/L potassium chloride solution can be passed through the chromatographic column, with several drops of solution (TS-148), and the solution is neutralized with concentrated ammonia test solution (TS-14). Add 1g ammonium nitrate to crystallize, stir to dissolve, and cool. Add 15mL ammonium molybdate test solution (TS-22) under stirring, and stir strongly for 3min, or place for 10 ~ 15 min under intermittent stirring. The contents of the beaker were filtered by suction filtration, and a 25 mm high porcelain funnel was used, in which a 6 ~ 7mrn thick pulp cushion was placed, and the cushion was covered with a layer of diatomite suspension. After the contents of the beaker are transferred to the filter, the beaker is washed with 1% sodium nitrate or potassium nitrate solution for 5 times and 10mL each time, and the washing liquid is passed through the filter. Then use this lotion to wash the filter 5mL each time 5 times. Return the filter pad and sediment to the beaker, rinse the funnel with water and flow into the beaker, then dilute to about 150mL with water. 0.1mol/L sodium hydroxide is added dropwise through a burette until the yellow precipitate is dissolved, and then 5 to 6 RNL is added. Add several drops of phenolphthalein test solution (TS-167) and titrate excess alkali with 0.1mol/L nitric acid. Finally, it was titrated with 0.1mol/L sodium hydroxide until pink appeared for the first time. The difference between the total amount of 0.1mol/L sodium hydroxide added minus the amount consumed by titration of nitric acid is the amount of 0.1mol/L sodium hydroxide consumed by phosphomolybdate (V; In mL). Finally, the amount of sodium tripolyphosphate (Na5P3O10) in the sample is calculated according to the formula of 0.533×25V, in mg.

Sodium tripolyphosphate

Sodium tripolyphosphate can be divided into high-temperature type (type I) and low-temperature type (type ii) due to different formation temperatures. the difference lies in the different bond lengths and bond angles of the two types of sodium tripolyphosphate. both type I and type ii products generate hexahydrate Na5P3O10·6H2O after hydration. under the same conditions, type I hydration produces high heat quickly, and when dissolved in water, it is easy to generate caking phenomenon. this is due to the presence of sodium ions in type I structure with four ligands, which have strong affinity for water, whereas type ii generates hexahydrate at a very slow speed in water.
Sodium tripolyphosphate
is quite stable at room temperature, and will slowly undergo hydrolysis reaction in humid air to finally generate sodium orthophosphate, and the reaction is as follows: Na5P3O10+2H2O→2Na2HPO4+NaH2PO4.
Chelating Ability to Metal Ions
Sodium tripolyphosphate has complexation with metal ions such as Ca2+, Mg2+, Fe3+ dissolved in water to form soluble complexes, such as: na5p3o10+Ca2+→ na3 (cap3o10)+2na+.
The complexing ability of sodium tripolyphosphate is generally expressed in terms of calcium value, i.e. the gram number of calcium ions that can be complexed by 100g of phosphate, and the theoretical value is 13.4.
buffer action
The aqueous solution of sodium tripolyphosphate is weakly alkaline (the PH value of 1% aqueous solution is about 9.7), and it forms a suspension (similar to emulsion) in water with a PH of 4.3-14, i.e. dispersion. Sodium tripolyphosphate can also enable liquid and solid particles to be better dissolved in liquid (such as water) medium, making the solution completely transparent in appearance, like a real solution, which is solubilization. As sodium tripolyphosphate has the above unique properties, it becomes an important ideal raw material in washing powder. [3]
Production process

Sodium tripolyphosphate is prepared by neutralizing phosphoric acid with soda ash to form sodium orthophosphate, and then condensing. There are two methods to produce phosphoric acid: wet method and thermal method. Wet process is to react phosphate rock with inorganic acid (usually sulfuric acid or hydrochloric acid), then extract and refine to obtain phosphoric acid. The thermal method is to roast phosphate rock together with coke and silica in an electric furnace, reduce phosphate rock to phosphorus, and then oxidize and hydrate to obtain phosphoric acid.
The process of preparing sodium tripolyphosphate
from orthophosphate is relatively simple, with short process and convenient control operation. There are mainly two methods.
(1) spray drying-converter polycondensation two-stage method: the spray dryer is a cylinder, the upper part of which is connected with a horizontal burner with a gas nozzle. The gas with the temperature of 400-500℃ is introduced into the upper part of the spray drying tower through the burner, and at the same time, the solution of orthophosphate is injected by a high pressure (4.2MPa) pump. Dried products containing less than 5% water are continuously taken out from the lower part of the dryer. Orthophosphate mixture is dehydrated and polycondensed into sodium tripolyphosphate in revolver. The method is characterized in that the product does not need to be crushed, the spray dryer has high drying efficiency, the dried materials are uniform, and delamination phenomenon does not occur. The disadvantage is that drying and polycondensation are carried out in two stages, and dust loss is large when directly heating and dehydrating.
(2) Drying-dehydration one-stage method: the slurry is sprayed into the revolver, and hot gas or burning oil is sent into the furnace through a nozzle to heat. The annular baffle divides the furnace into a flame section and a heating section. In the heating section, the material is finally dehydrated and polycondensed to be converted into sodium tripolyphosphate. The cooling cylinder is connected with the revolver as a whole. Granular products from the cooling cylinder are ground in a grinding machine, and a small amount of powder from the furnace is recovered in a cyclone separator. This method combines drying, dehydration and cooling in one unit equipment, which greatly simplifies the process, has high heat utilization rate, and can reduce infrastructure investment and improve working conditions.
Technical requirements
1. Appearance: white particles or powder
2. industrial Sodium Tripolyphosphate shall meet the requirements of the following table (GB9983-2004)
Project indicators
Excellent products, first-class products, qualified products
Whiteness,% ≥ 90.085.080
Phosphorus pentoxide (P2O5),% ≥ 57.0 56.5 55.0
Sodium tripolyphosphate (Na5P3O10) content,% ≥ 96.0 90.0 85.0
Insoluble sludge content,% ≤ 0.10 0.10 0.15
Iron content (Fe),% ≤ 0.007 0.015 0.030
PH value (1% solution) 9.2-10.0
The sieving rate of the particle size passing the 1.00mm test sieve is not less than 95%
Content analysis
(FCC law)
I preparation of reagents

1。 Potassium Acetate Buffer (pH5.0) Take 78.5g of Potassium Acetate, dissolve in 1000mL of water, and adjust the solution to pH5.0 with acetic acid. Add a few milligrams of Mercury(II) iodide to inhibit mold growth.
2。 Take 22.35g of potassium chloride from 0.3 mol/L potassium chloride solution, dissolve in water, add 5mL of the above-mentioned Potassium Acetate buffer solution, dilute with water to 1000mL, and mix well. Add Mercury(II) iodide, mg.
3。 Take 4.7g of potassium chloride from 0.6 mol/L potassium chloride solution, dissolve in water, add 5mL of the above-mentioned Potassium Acetate buffer solution, dilute with water to 1000mL, and mix well. Add Mercury(II) iodide, mg.
4。 Take 74.5g of potassium chloride from 1mol/L potassium chloride solution, dissolve it with water, add 5mL of the above-mentioned Potassium Acetate buffer, dilute it with water to 1000mL, and mix. Add Mercury(II) iodide, mg.
II. Chromatographic Columns
Using a standard chromatographic column with a length of 20-40 cm and an inner diameter of 20-28 mm, seal a coarse-hole sintered plate. If there are no stoppers respectively, connect a short polyethylene hose at the outlet of the column, and then connect a stopcock with an aperture of 3-4 mm.
III. Operation
Close the stopcock, fill the space between the sintered plate and the stopcock with water, and connect a vacuum line to the stopcock. Using 100-200 mesh or 200-400 mesh strong alkali anion exchange resin (Dowex 18) or styrene/divinylbenzene ion exchange resin of similar grade, and water according to the ratio of 1:1 to make each slurry. Decant the extremely fine particles and foam, and repeat this for 2-3 times, or until there is no fine suspended matter or foam. Fill the chromatographic column with slurry, open the stopcock, and vacuum the tree bed until the water level is slightly higher than the top of the Resin bed, then immediately close the stopcock. Under no circumstances should the water level be lower than the resin level. This is repeated until the resin is 15cm higher than the sintered plate. Take a piece of filter paper closely attached to glass fiber and place it on the top of Resin bed, then take a perforated polyethylene dish and place it on the filter paper. You can also install a layer of loose glass wool on top of the Resin bed. Plug the top of the column with a rubber stopper, insert a 7.6cm long capillary tube (inner diameter 1.5mm, outer diameter 7tnm) in the center of the rubber stopper, and extend about 12mrn below the stopper. Connect the capillary tube with a 500mL separatory funnel lower tube using a length of polyethylene hose. And put separatory funnel in the iron ring above the column. Close all stoppers and add 100mL of water to the separatory funnel to wash the chromatographic column. Loosen the separatory funnel stopcock first, then release the chromatographic column stopcock at a flow rate of about 5mL/min. When the separatory funnel is released, first close the column stopcock, then close the separatory funnel stopcock.
Accurately weigh about 500mg of test sample that has been dried at 105℃ for 4 hours, put it into a 250mL volumetric flask, dissolve it with water and mix it after constant volume. Take 10.0mL of this solution and transfer it to separatory funnel. Open the two stoppers to allow the solution to flow into the chromatographic column. Rinse separatory funnel with water and discard the eluate.
370mL of 0.3mol/L potassium chloride solution was added to the separatory funnel, and the solution was passed through a chromatographic column to discard the eluate. Add 250mL of 0.6mol/L potassium chloride solution to separatory funnel, let the solution pass through the chromatographic column, and collect the eluate in a 400mL beaker. (In order to ensure a clean chromatographic column during the next round of operation, 100mL of 1mol/L potassium chloride solution can be passed through the chromatographic column, with several drops of solution (TS-148), and the solution is neutralized with concentrated ammonia test solution (TS-14). Add 1g ammonium nitrate to crystallize, stir to dissolve, and cool. Add 15mL ammonium molybdate test solution (TS-22) under stirring, and stir strongly for 3min, or place for 10 ~ 15 min under intermittent stirring. The contents of the beaker were filtered by suction filtration, and a 25 mm high porcelain funnel was used, in which a 6 ~ 7mrn thick pulp cushion was placed, and the cushion was covered with a layer of diatomite suspension. After the contents of the beaker are transferred to the filter, the beaker is washed with 1% sodium nitrate or potassium nitrate solution for 5 times and 10mL each time, and the washing liquid is passed through the filter. Then use this lotion to wash the filter 5mL each time 5 times. Return the filter pad and sediment to the beaker, flow them into the beaker with a Photographic processing funnel, and dilute to about 150mL with water. 0.1mol/L sodium hydroxide is added dropwise through a burette until the yellow precipitate is dissolved, and then 5 to 6 RNL is added. Add a few drops of phenolphthalein solution (TS-167) and titrate the excess alkali with 0.1mol/L nitric acid. Finally, it was titrated with 0.1mol/L sodium hydroxide until pink appeared for the first time. The difference between the total amount of 0.1mol/L sodium hydroxide added minus the amount consumed by titration of nitric acid is the amount of 0.1mol/L sodium hydroxide consumed by phosphomolybdate (V; In mL). Finally, the amount of sodium tripolyphosphate (Na5P3O10) in the sample is calculated according to the formula of 0.533×25V, in mg.
Classification
According to its structure and shape, it can be divided into white powder anhydrous substance (Na5P3O10) and hexagonal hydrate (Na5P3O10·6H2O) crystallized from right-angle parallelepiped. anhydrous substance is divided into Type I and Type II. Sodium tripolyphosphate for industrial use is actually a mixture of Type I and Type II. Type I has a fast dissolution rate and a large thermal effect when hydrated to form hexahydrate, which is easy to absorb moisture and agglomerate in the atmosphere. Type II absorbs moisture slowly and is not easy to agglomerate. Therefore, the content of type I in sodium tripolyphosphate for detergent should not be too high, and is generally controlled at 10-30%. [4]
Safety
LD50: 6500 RNG/kg (BW) orally in rats; ADI:MTDI70mg/kg (based on total phosphorus from various sources, FAO/WHO,1994); GRAS:FDA-21CFR173.370; 182.6760 [1] 。
use
Industry
It can be used as detergent additive, and can also be used in petroleum, metallurgy, mining, papermaking, water treatment, etc. It is mainly used as an auxiliary agent for synthetic detergents, as a soap synergist and to prevent soap grease precipitation and silvery. It has strong emulsifying effect on lubricating oil and fat, and can be used to adjust the PH value of buffer soap solution. Water softener for Industrial Water Use. Tanning-agent. Dyeing auxiliaries. In the industries of paint, kaolin, magnesium oxide, calcium carbonate and so on, it is used as dispersant when preparing suspension. Dispersant for drilling mud. The paper industry is used as an anti-oil stain agent. Quality improvers and water retention agents for canned food, fruit juice drinks, dairy products, soybean milk, etc. in the food industry. It is mainly used for tenderizing canned ham and softening bean skin in canned broad bean. It can also be used as softener and thickener.
STPP also has its inevitable environmental hazards. Because it contains phosphorus, it is easy to cause eutrophication of water body.
Due to the introduction of the national phosphorus limitation policy, the application of sodium tripolyphosphate in detergent additives is gradually reduced and gradually replaced by layered sodium silicate, molecular sieve and other products.
Food industry
Water retention agent, quality improver, pH regulator, metal chelating agent. China’s Hygienic Standard for the Use of Food Additives (GB2760-2011) stipulates that the maximum amount of canned food, fruit juice (fruity) drinks and vegetable protein drink is 1.0g/kg;. Dairy products, Poultry products, meat products, ice cream, instant noodles, the maximum amount of ambassador is 5.0g/kg. When compound phosphate is used, the canned meat products shall not exceed 1.0g/kg; based on phosphate. Condensed milk shall not exceed 0.50 g/kg; When this product is used in combination with sodium pyrophosphate and sodium phosphate, it shall not exceed 5g/kg based on phosphate. Western-style cooking and smoked ham shall comply with GB13101-1991 “Hygienic Standard for Western-style Cooking and Smoked Ham”, and the compound usage shall not exceed 5g/kg (western-style ham may be appropriately added, and 8g/kg calculated as phosphate). Other usage reference: For canned ham, it is beneficial to improve the product quality under appropriate conditions, such as the finished product is complete in shape, good in color, tender in meat quality, easy to slice and glossy in section. Sodium tripolyphosphate is used for curing ham raw meat. No.3 mixed salt (refined salt 91.65%, granulated sugar 8%, sodium nitrite 0.35%)2.2kg and sodium tripolyphosphate 85g are added to every l00kg of meat, and the mixture is fully stirred evenly and cured in a cold storage at 0-4℃ for 48-72 hours, with good effect. It can be used in the production of canned broad bean, and can soften bean skin. Many fruits and vegetables have tough skins. As fruits and vegetables mature, the skins become tougher. In fruit and vegetable processing blanching or soaking water, polyphosphate is added to complexe calcium, thus reducing the toughness of the outer skin [1].
Precautions for use
Risk terms: r36/37/38: irrating to eyes, respiratory system and skin. Stimulate eyes, respiratory system and skin.
Security terminology: s24/25: avoidcontact with skin and eyes. Avoid contact with skin and eyes.
Note: s24/25 avoidcontact with skin and eyes. Avoid contact with skin and eyes.
S26 In case of contact with eyes, rinse immediately with plenty of water and seek medical advice。
After contact with eyes carelessly, please use plenty of clear water to Photographic processing immediately and consult a doctor.
S36 Wear suitable protective clothing。
Wear appropriate protective clothing.
Storage and transportation: Store in a sealed container. Store in a cool, dry and well ventilated place away from incompatible substances. Storage is conducive to protected humidity

Shangrao Sodium Tripolyphosphate Suppliers Share the Main Properties and Functions of Sodium Tripolyphosphate

This product of sodium tripolyphosphate from Shangrao sodium tripolyphosphate supplier is widely used in ceramic, washing, printing and dyeing, water treatment, papermaking and other industries. Some technical personnel in the industry have their own unique product requirements in the production process of sodium tripolyphosphate. Solubility, peptization ability, coloring uniformity, etc. According to their own product requirements, they began to seek suitable sodium tripolyphosphate products.

Shangrao sodium tripolyphosphate supplier Xiaobian next decomposes the performance and function of our product:

Performance: Sodium tripolyphosphate specially used for ceramics produced by Chongqing East Sichuan Chemical Industry (Group) Company has a very significant effect on the peptization of ceramic slurry, especially ceramic glaze. Compared with other sodium tripolyphosphate or ceramic diluents in China, the product has the remarkable characteristics of less dosage, lower impurities, better peptization effect and more stable quality.

Function: Reduce the viscosity of the mud, improve the fluidity of the mud and reduce the water content of the mud, thus reducing the damage energy consumption of ball mill and spray drying tower, increasing the output, making the grain grading of the powder more reasonable, improving the comprehensive performance of the powder and increasing the strength of the green body.

Perhaps when you search for sodium tripolyphosphate, you will see many different manufacturers and brands, and the prices are also different, with high prices and low prices. Perhaps new users will ask, “why is your reunion so expensive? In fact, every penny counts, our products are of the most guaranteed quality, and our brand’s reputation in the ceramic industry is also big.

Old users of suppliers of sodium tripolyphosphate in Shangrao often help to publicize our brand after using it and spread a good word of mouth in the industry: the sodium tripolyphosphate produced by Chongqing East Sichuan Group is easy to use and worry about. Compared with the products produced by other manufacturers, the consumption of sodium tripolyphosphate is less and looks expensive on the surface. In fact, the total production cost is more cost-effective than that of sales profit accounting. It not only upgrades the product grade, but also improves the quality of ceramic products!

Shangrao Sodium Tripolyphosphate Suppliers Share the Main Properties and Functions of Sodium Tripolyphosphate

This product of sodium tripolyphosphate from Shangrao sodium tripolyphosphate supplier is widely used in ceramic, washing, printing and dyeing, water treatment, papermaking and other industries. Some technical personnel in the industry have their own unique product requirements in the production process of sodium tripolyphosphate. Solubility, peptization ability, coloring uniformity, etc. According to their own product requirements, they began to seek suitable sodium tripolyphosphate products. Shangrao sodium tripolThis product of sodium tripolyphosphate from Shangrao sodium tripolyphosphate supplier is widely used in ceramic, washing, printing and dyeing, water treatment, papermaking and other industries. Some technical personnel in the industry have their own unique product requirements in the production process of sodium tripolyphosphate. Solubility, peptization ability, coloring uniformity, etc. According to their own product requirements, they began to seek suitable sodium tripolyphosphate products. Shangrao sodium tripolyphosphate supplier Xiaobian next decomposes the performance and function of our product: Performance: Sodium tripolyphosphate specially used for ceramics produced by Chongqing East Sichuan Chemical Industry (Group) Company has a very significant effect on the peptization of ceramic slurry, especially ceramic glaze. Compared with other sodium tripolyphosphate or ceramic diluents in China, the product has the remarkable characteristics of less dosage, lower impurities, better peptization effect and more stable quality. Function: Reduce the viscosity of the mud, improve the fluidity of the mud and reduce the water content of the mud, thus reducing the damage energy consumption of ball mill and spray drying tower, increasing the output, making the grain grading of the powder more reasonable, improving the comprehensive performance of the powder and increasing the strength of the green body. Perhaps when you search for sodium tripolyphosphate, you will see many different manufacturers and brands, and the prices are also different, with high prices and low prices. Perhaps new users will ask, ” why is your reunion so expensive? In fact, every penny counts, our products are of the most guaranteed quality, and our brand’s reputation in the ceramic industry is also big. Old users of suppliers of sodium tripolyphosphate in Shangrao often help to publicize our brand after using it and spread a good reputation in the industry: the sodium tripolyphosphate produced by Chongqing East Sichuan Group is easy to use and worry about. Compared with the products produced by other manufacturers, it uses less and looks expensive on the surface. In fact, it is more cost-effective to calculate the total production cost and sales profit. It not only upgrades the product grade, but also improves the quality of ceramic products! Shangrao Sodium Tripolyphosphate Supplier’s Official Website: www.jiaqi2006.comyphosphate supplier Xiaobian next decomposes the performance and function of our product: Performance: Sodium tripolyphosphate specially used for ceramics produced by Chongqing East Sichuan Chemical Industry (Group) Company has a very significant effect on the peptization of ceramic slurry, especially ceramic glaze. Compared with other sodium tripolyphosphate or ceramic diluents in China, the product has the remarkable characteristics of less dosage, lower impurities, better peptization effect and more stable quality. Function: Reduce the viscosity of the mud, improve the fluidity of the mud and reduce the water content of the mud, thus reducing the damage energy consumption of ball mill and spray drying tower, increasing the output, making the grain grading of the powder more reasonable, improving the comprehensive performance of the powder and increasing the strength of the green body. Perhaps when you search for sodium tripolyphosphate, you will see many different manufacturers and brands, and the prices are also different, with high prices and low prices. Perhaps new users will ask, ” why is your reunion so expensive? In fact, every penny counts, our products are of the most guaranteed quality, and our brand’s reputation in the ceramic industry is also big. Old users of suppliers of sodium tripolyphosphate in Shangrao often help to publicize our brand after using it and spread a good reputation in the industry: the sodium tripolyphosphate produced by Chongqing East Sichuan Group is easy to use and worry about. Compared with the products produced by other manufacturers, it uses less and looks expensive on the surface. In fact, it is more cost-effective to calculate the total production cost and sales profit. It not only upgrades the product grade, but also improves the quality of ceramic products! Shangrao Sodium Tripolyphosphate Supplier’s Official Website: www.jiaqi2006.com

Alkyl Polyglucoside APG-1214

Alkyl Polyglucoside APG-1214 

  • APG 0810 70%

 

Product:

Product Name: Alkyl Polyglucoside APG-1214 

CAS NO.: 110615-47-9

Purity:50%.

 

Technical Index:

 

Item  Specifications
1. Appearance   Light yellow liquid
2. Content (%)   ≥50.0
3. PH Value   11.5-12.5
4. Residual Alcohol   ≤1.0
5. Viscosity (mpa.s 20℃)   ≥1500
6. Ash content (%)  ≤3.0

Application:

It is widely used in hard surface detergents, dish washing detergents, industrial cleaning agent, glyphosate additives, fire additives.

Instruction:

APG1214 is mild, non-irritation to the eyes, good compatibility to environmnt, it can bewidely used in personal care and household washing such as shampoo,hand sanitizer,facial cleanser,shower gel and . It also can be uesd in transparent soap,laundry detergent, dishwashing detergent and other areas, eapecially in the field of infant and child care. Because APG1214 does not need to rinse, especially suitable for no-clean formula such as hair care products and hair gel products.

 

Remarks:

storage

 

When products were stored at room temperature, there will be a small amount of solid precipitation or appearance of turbidity which is due to a small amount of Ca2.Ma2(≤500ppm)at high PHs, but this will have no negative impacts on the properties.When lower PH value down to 9 or less, the products can become clear and transparent.

Packaging

50/120/160/220 kg plastic drum or 1MT IBC

Transportation

Transport as general chemicals, seal upward,rain-proof and sun-proof. Our company can shipment the cargo according to customers demand.

 

Alkyl polyglucoside cas:110615-47-9

 

Alkyl polyglucoside cas:110615-47-9

  • APG 0810 70%

Quick Details

CAS No.: 110615-47-9

Other Names: APG1214

MF: C18H36O6

EINECS No.: 600-975-8

Place of Origin: Tianjin, China (Mainland)

Purity: 50%

Appearance: Colorless Transparent Liquid

Usage: Cosmetic Raw Materials, Detergent Raw Materials, Hair Care Chemicals, Oral Care Chemicals

Brand Name: BRG

Model Number: 50%

Company information:

Tianjin Yuanlong 
Chemical Industry Co., Ltd.

was founded in 1995. It’s located in No. 10 Hanbei Road, Hangu, Binhai New Area, Tianjin, whole factory area covers more than 20,000 square meters. It’s only 25 kms from our plant to Tianjin harbor, very convenient for us to load cargos in our plant. In this way, we control the whole loading process easily, so that we can ensure all packaging are intact.