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Production method of trisodium pyrophosphate

A technology of monohydrogen trisodium pyrophosphate and anhydrous monohydrogen trisodium pyrophosphate, applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve the problems of no production process and application research, and achieve convenient process, The effect of strong operability and high purity

Active Publication Date: 2013-03-13
HUBEI XINGFA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Trisodium monohydrogen pyrophosphate is a new additive that can be used in food. At present, there are no reports on its production process and application research in China.

Method used

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  • Production method of trisodium pyrophosphate
  • Production method of trisodium pyrophosphate

Examples

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example 1

[0026] Dissolve 520g of disodium dihydrogen pyrophosphate with a content of 96% into 600ml of distilled water, dissolve 90g of sodium hydroxide in 100ml of hot water, and keep the solution at 60-110°C; continuously stir the sodium hydroxide solution and add dihydrogen pyrophosphate In disodium solution, keep warm for 30min. The solution is cooled to 50°C, centrifuged, and the solid crystalline substance is dried, the temperature is controlled at 105-160°C, and the drying time is 2-4h to obtain monohydrogen trisodium pyrophosphate monohydrate product. Continue drying at 180-220°C for 2-6 hours to obtain anhydrous trisodium monohydrogen pyrophosphate.

example 2

[0028] Dissolve 520g of disodium dihydrogen pyrophosphate with a content of 96% into 700ml of distilled water, and the solution is heated to 60-110°C; 119.3g of sodium carbonate is added with continuous stirring, and after the insulation reaction for 30min, the solution is cooled to 50°C for centrifugation. The solid crystalline substance is dried, the temperature is controlled at 105-160° C., and the drying time is 2-4 hours to obtain monohydrogen trisodium pyrophosphate monohydrate product. Continue drying at 180-220°C for 2-6 hours to obtain anhydrous trisodium monohydrogen pyrophosphate.

example 3

[0030] Take 500g of pyrophosphoric acid (60%) solution, dissolve 337g of sodium hydroxide in 500ml of water, add the sodium hydroxide solution into the pyrophosphoric acid solution with continuous stirring, react for 30min, cool the solution to 50°C and centrifuge, and dry the solid crystalline substance. The temperature is controlled at 105-160°C, and the drying time is 2-4 hours to obtain monohydrogen trisodium pyrophosphate monohydrate product. Continue drying at 180-220°C for 2-6 hours to obtain anhydrous trisodium monohydrogen pyrophosphate.

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Abstract

The invention relates to a production method of trisodium pyrophosphate. The method is characterized by: reacting a pyrophosphate-containing compound with an alkali or acid at 60-110DEG C to obtain a solution, i.e. a mother solution, and subjecting the mother solution to cooling crystallization, centrifugal separation and drying to obtain anhydrous trisodium pyrophosphate or trisodium pyrophosphate monohydrate. The invention provides the production method of trisodium pyrophosphate, which is a new variety phosphate at home. The technology is initiated in China for the first time, and fills the gap in the aspect. At the same time, the problems of poor solubility and strong alkalinity in sodium pyrophosphate application are solved, so that the trisodium pyrophosphate can replace sodium pyrophosphate in numerous application fields. With strong operability, the production technology provided in the invention has a process very convenient for industrialization, and the obtained product has high purity.

Description

technical field [0001] The invention relates to a method for producing trisodium monohydrogen pyrophosphate by reacting a compound containing pyrophosphate and alkali or acid as raw materials. Background technique [0002] Phosphates are widely used in food, and sodium pyrophosphate is widely used as a water-retaining agent in meat products and aquatic products; Sodium pyrophosphate has poor solubility, especially under low temperature conditions, and the dissolution rate is full, and it is easy to agglomerate in the solution, which is not convenient for the industrial processing of food. [0003] Trisodium monohydrogen pyrophosphate is a phosphate between sodium pyrophosphate and disodium dihydrogen pyrophosphate, with a pH value of 7.0±0.5 and good solubility. It can be avoided when used in combination with sodium pyrophosphate or alone. Disadvantages of sodium pyrophosphate in food processing. In addition, trisodium monohydrogen pyrophosphate can also be used as a flavo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/42
Inventor 李国璋屈云张亚娟范佳利龚敏
Owner HUBEI XINGFA CHEM GRP CO LTD
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