POTASSIUM TRIPHOSPHATE
Potassium triphosphate
CAS: 13845-36-8
Molecular Formula: H6KO10P3
POTASSIUM TRIPHOSPHATE - Names and Identifiers
| Name | Potassium triphosphate |
| Synonyms | KTPP POTASSIUM TRIPHOSPHATE Potassium triphosphate Potassium Tripolyphosphate POTASSIUM TRIPOLYPHOSPHATE Pentapotassium triphosphate PENTAPOTASSIUM TRIPHOSPHATE PotassiumTripolyphosphateFoodGrade PotassiumTripolyphosphateTechGrade Triphosphoricacid,pentapotassiumsalt |
| CAS | 13845-36-8 |
| EINECS | 237-574-9 |
| InChI | InChI=1/9K.3H3O4P/c;;;;;;;;;3*1-5(2,3)4/h;;;;;;;;;3*(H3,1,2,3,4)/q9*+1;;;/p-9 |
POTASSIUM TRIPHOSPHATE - Physico-chemical Properties
| Molecular Formula | H6KO10P3 |
| Molar Mass | 298.06 |
| Density | 2,54 g/cm3 |
| Melting Point | 620°C |
| Appearance | Powder |
| Specific Gravity | 2.54 |
| Color | white |
| Storage Condition | Inert atmosphere,Room Temperature |
| Physical and Chemical Properties | See potassium tripolyphosphate. |
| Use | Used as emulsifiers, humectants, chelating agents, stabilizers, tissue modifiers, binders, color fixatives, antioxidants, preservatives, etc |
POTASSIUM TRIPHOSPHATE - Nature
Open Data Verified Data
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. It has good ability to complex metal ions, can form soluble complexes, and is an excellent metal complex agent.
Last Update：2024-01-02 23:10:35
POTASSIUM TRIPHOSPHATE - Preparation Method
Open Data Verified Data
commonly used are condensed phosphoric acid one-step method, thermal phosphoric acid two-step method, ferrophosphorus sintering method, calcination hydrolysis method.
- condensed phosphoric acid one-step method: dissolve potassium carbonate into potassium carbonate solution, add it into the neutralization reactor with stirring and heating device, slowly add condensed phosphoric acid under stirring to carry out neutralization reaction, and require the formation of liquid, when the ratio of K2 0/P2 05 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 crushing, the industrial potassium tripolyphosphate is obtained.
- thermal phosphoric acid two-step method: the thermal phosphoric acid (50% ~ 60% solution) is added to the neutralization tank after being measured, and potassium carbonate is slowly added to the neutralization reaction under stirring, the pH value is controlled at about 6.7 to 7.0, so that the neutralized feed solution in the tank maintains the ratio of 2mol of Dipotassium hydrogen phosphate and 1mol of potassium dihydrogen phosphate, and the neutralized solution enters the spray drying tower through the high level tank to dry to obtain a dry powder, the dry material is discharged from the bottom of the tower, enters the rotary polymerization furnace through the silo, and the polymerization reaction is carried out at about 400 ° C to generate potassium tripolyphosphate. After cooling and crushing, the industrial potassium tripolyphosphate product is prepared.
- phosphorus iron sintering method: the phosphorus iron is crushed to 122um, mixed with potassium carbonate, and the ratio of potassium to phosphorus in the mixture is to 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 ~ 5r/min for heating and calcining. When the temperature reaches 700~900 ℃, the material exhibits good fluidity, the calcination can be stopped, and the material is discharged from the outlet of the furnace tail. The hot material is added into the leaching tank and leached with water, and the mixture is continuously stirred with compressed air for 4 hours. Filtering, neutralizing the feed solution with phosphoric acid to adjust the ratio of 2mol of Dipotassium hydrogen phosphate and 1 mol of potassium dihydrogen phosphate, and then entering the feed solution through the high level tank into the 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.
Last Update：2022-01-01 09:07:52
POTASSIUM TRIPHOSPHATE - Use
Open Data Verified Data
used in the food industry as a tissue improver, chelating agent and water retention agent. It dissolves better than traditional sodium phosphate and works better in meat products, fish, shrimp and dairy products. China's provisions of canned food, fruit juice (fruit flavor) beverages, plant protein beverages, the maximum use of 1. Og/kg; Dairy products, poultry products, ice cream, instant noodles, meat products 5. Og/kg; Fruit flavor (not fruit juice) product 0. 15g/kg. When used as a compound phosphate, the total amount of phosphate in canned meat products should not exceed 11 0g/kg, condensed milk should not exceed 0.5g/kg. When sodium pyrophosphate, sodium tripolyphosphate and trisodium phosphate are used in combination, the maximum is 5g/kg.
Last Update：2022-01-01 09:07:52
POTASSIUM TRIPHOSPHATE - Safety
Open Data Verified Data
ADI = 0-70mg/kg (calculated as phosphorus, total phosphate ADI, FAO/WHO, 2001). Should be stored in a cool, ventilated, dry, clean warehouse. It shall not be stored and transported together with toxic and hazardous substances. Protection against rain and sun exposure during transport. When there is a fire, it can be suppressed by water and various kinds of fire retardants.
Last Update：2022-01-01 09:07:53
POTASSIUM TRIPHOSPHATE - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | 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. It 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. used as a tissue improver in the food industry. Used as chelating agent, water treatment agent. used as emulsifier, humectant, chelating agent, stabilizer, tissue improver, binder, color fixative, antioxidant, preservative, etc. used for soil improvement, oil emulsification, used as liquid detergent (such as shampoo) the buffer. It is an efficient compound fertilizer of phosphorus and potassium. Adding the appropriate amount of trace elements can be made into multi-element compound fertilizer. tissue improver; Chelating agent; Emulsifier; Buffer; Stabilizer; Water treatment agent. |
| identification test | solubility very soluble in water. According to the OT-42 method. 5% of the aqueous sample tested positive for potassium (IT-27). 1 ml of 1% aqueous sample solution was taken, and several drops of silver nitrate solution (TS-210) were added to form a white precipitate, which was soluble in dilute nitric acid solution (TS-158). The pH of the 1% aqueous solution is 9.2-10.1. According to the conventional method of measurement. |
| content analysis | the content analysis method in "sodium tripolyphosphate (12004)" was carried out. The content of potassium tripolyphosphate (K5P3O10) in the sample was determined in mg according to the formula 0.650 × 25v. |
| toxicity | ADI ~ 70 (based on total phosphate based on phosphorus; FAO/WHO,2001). Adl 0-70 mg/kg (calculated as phosphorus, FAO/WHO,1982). According to FAO/WHO regulations: can be used for the highest amount of 1 g/kg meat soup; Frozen fish fillets, shrimp and other aquatic products, milk powder, cream powder 5g/kg; Cheese 9 g/kg; Sweetened condensed milk, 2g/kg of cream; 3g/kg of pickled meat, lunch meat, etc. |
| usage limit | FAO/WHO(1984,g/kg): meat soup l; Quick-frozen fish fillets, shrimp and other aquatic products, milk powder, cream powder 5; Cheese 9; Condensed milk, cream 2; Pickled meat, lunch meat, etc. 3 (all P2O5). GB 2760-2001:① same as "12002", sodium hexametaphosphate; ② GMP for peeling of fruits and vegetables; Meat products of shrimp and fish, 1.0g/kg. |
| production method | 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. |
Last Update：2024-04-09 19:05:07
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