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By forming a protective film on iron, lead and zinc, Potassium Tripolyphosphate holds application for corrosion prevention on a range of metal surfaces.
Potassium Tripolyphosphate is also used as a builder in liquid cleaning formulations and a stabiliser in soap products.
Potassium Tripolyphosphate can also be used as a dispersing agent in the production of latex paints.
CAS: 13845-36-8
MF: H6KO10P3
MW: 298.06
EINECS: 237-574-9
Synonyms
PotassiuM Tripolyphosphate 50%;Triphosphoricacid, potassiuM salt (1:5);POTASSIUM TRIPHOSPHATE;POTASSIUM TRIPOLYPHOSPHATE;PENTAPOTASSIUM TRIPHOSPHATE;Triphosphoricacid,pentapotassiumsalt;PotassiumTripolyphosphateFoodGrade;PotassiumTripolyphosphateTechGrade
Potassium Tripolyphosphate can be used for several applications.
Cleaning agent or treatment of metal surfaces for example.
Potassium Tripolyphosphate in solid form is suitable for preventing corrosion on different surfaces, Iron, Lead or other metals.
White, crystalline solid.
Solubility in water (26C) more than 140 g/100 m L water.
Water-treating compounds, cleaners, specialty fertilizers, sequestrant.
Potassium Tripolyphosphate Chemical Properties
Melting point: 620°C
Density: 2,54 g/cm3
Storage temp.: Inert atmosphere,Room Temperature
Form: Powder
Specific Gravity: 2.54
Color: white
Odor: odorless
InChI: InChI=1S/K.H5O10P3.H/c;1-11(2,3)9-13(7,8)10-12(4,5)6;/h;(H,7,8)(H2,1,2,3)(H2,4,5,6);
InChIKey: VPGOTXNIRSCNLD-UHFFFAOYSA-N
CAS DataBase Reference: 13845-36-8(CAS DataBase Reference)
EPA Substance Registry System: Potassium Tripolyphosphate (13845-36-8)
White Crystal or powder.
Melting point 620~640 deg C; d 2. 54. Soluble in water, the aqueous solution is alkaline, in water will be gradually hydrolyzed to form orthophosphate.
Potassium Tripolyphosphate has good ability to complex metal ions, can form soluble complexes, and is an excellent metal complex agent.
Uses
1. Used as a tissue improver in the food industry.
Used as a chelating agent and water treatment agent.
2. Used for soil improvement, oil emulsificationandliquid detergent buffer.
3. Potassium Tripolyphosphate is a highly efficient phosphorus-potassium compound fertilizer.
Potassium Tripolyphosphate can be made into a multi-element high-efficiency compound fertilizerwith appropriate amount of trace elements.
Potassium Tripolyphosphate is used as a tissue improver, chelating agent and water treatment agent in food processing.
Widely used in lunch meat, cooked pork leg, cooked ham and meat, sweet condensed milk, cream, milk powder, processed cheese, frozen fish fillets, shrimp and other aquatic products.
Potassium Tripolyphosphate is mainly used in the industry for soil improvement, oil emulsification, liquid detergent buffer, etc.; In the food industry, it is used as a tissue improver, a chelating agent, a water treatment agent, etc.
Potassium Tripolyphosphate used as a tissue improver in the food industry.
Potassium Tripolyphosphate used as chelating agent, water treatment agent.
used as emulsifier, humectant, chelating agent, stabilizer, tissue improver, binder, color fixative, antioxidant, preservative, etc.
Potassium Tripolyphosphate used for soil improvement, oil emulsification, used as liquid detergent (such as shampoo) the buffer.
Potassium Tripolyphosphate is an efficient compound fertilizer of phosphorus and potassium.
Adding the appropriate amount of trace elements can be made into multi-element compound fertilizer.
Preparation Method
Potassium Tripolyphosphate is obtained by heating and dehydrating dipotassium hydrogen phosphate and potassium dihydrogen phosphate.
common production methods include condensed phosphoric acid one-step method, thermal phosphoric acid two-step method, ferrophosphorus sintering method, calcination hydrolysis method.
The condensed phosphoric acid is dissolved into potassium carbonate solution by one-step method, and is added into a neutralization reactor with a stirring and heating device.
Under stirring, the condensed phosphoric acid is slowly added for neutralization reaction, and a feed liquid is required to be generated, when the ratio of K2O/P2O5 is 1.667, it enters the rotary polymerization reaction furnace through the high level tank, and the potassium tripolyphosphate is synthesized by drying and polymerization in one step.
After cooling and pulverizing, the industrial potassium tripolyphosphate is obtained.
4H5P3O10 10K2CO3 → 4K5P3O10 10H2O 10CO2 phosphonic acid two-step method the thermal phosphoric acid (50% ~ 60% solution) is metered into the neutralization tank, slowly adding potassium carbonate under stirring for neutralization reaction, the pH value is controlled at about 6.7~7.0, so that the neutralized feed solution in the tank maintains the ratio of 2 mol of Dipotassium hydrogen phosphate and 1 mol of potassium dihydrogen phosphate, the neutralized solution enters the spray drying tower through the high level tank to be dried to obtain the dry powder, the dry material is discharged from the bottom of the tower, enters the rotary polymerization furnace through the Hopper, and the polymerization reaction is carried out at about 400 ℃ to generate potassium tripolyphosphate, after cooling and grinding, the finished product of industrial potassium tripolyphosphate was obtained.
Its 6H3PO4 5K2CO3 → 4K2HPO4 2KH2PO4 5H2O 5CO2 ↑ 4K2HPO4 2KH2PO4 → 2K5P3O10 4H2O phosphorus iron sintering method to pulverize phosphorus iron to 120 mesh, mix with potassium carbonate, and the ratio of potassium to phosphorus in the mixture should reach the required amount of tripotassium phosphate, the mixed uniformly crushed material is added into the rotary drum-type ferrophosphorus calciner with a rotating speed of 3~5 r/m for heating and calcining.
When the temperature reaches 700~900 ℃, the material exhibits good fluidity, the calcination can be stopped, the material is discharged from the outlet of the furnace tail, and the hot material is added into the leaching tank to be leached with water.
At the same time, the material is continuously stirred with compressed air for 4H and filtered, after neutralizing the feed solution with phosphoric acid to reach the ratio of 2 mol of Dipotassium hydrogen phosphate and 1mol of potassium dihydrogen phosphate, the feed solution is passed through a high level tank into a spray drying tower for drying, and the obtained dry powder is discharged from the bottom of the tower, through the silo into the rotary polymerization furnace polymerization reaction at 400 deg C, after cooling, crushing, industrial production of potassium tripolyphosphate products.
The commonly used production methods include the one-step method of condensed phosphoric acid and the two-step method of thermal phosphoric acid.
Thermal phosphoric acid two-step method see industrial potassium tripolyphosphate, the difference is, to add arsenic removal agent and heavy metal removal agent for solution purification, filtration to remove impurities such as arsenic and heavy metals.
