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A kind of production technology of chlorinated trisodium phosphate

A chlorinated trisodium phosphate, production process technology, applied in the chemical industry, can solve the problems of difficult chlorine tail gas treatment, low available chlorine content, poor stability, etc., to achieve efficient and environmentally friendly production process, low production cost, and good stability Effect

Inactive Publication Date: 2015-09-30
GUIZHOU KAILIN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a production process of chlorinated trisodium phosphate, which solves the problems in the existing production technology of chlorinated trisodium phosphate, such as low product available chlorine content, poor stability, complex equipment, and difficult handling of chlorine-containing tail gas.

Method used

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  • A kind of production technology of chlorinated trisodium phosphate

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Comparison scheme
Effect test

Embodiment 1

[0073] (1) Mix trisodium phosphate, disodium hydrogen phosphate and sodium hypochlorite according to the molar ratio of sodium to phosphorus of 2.7:1 and the molar ratio of sodium hypochlorite to phosphate of 3:4 to obtain a raw material mixture; total phosphorus in the raw material mixture The content is: the mass fraction of phosphorus pentoxide is 0.085;

[0074] (2) Preheat the water in the salt tank to 65°C, and add the raw material mixture described in step (1) to prepare a saturated solution;

[0075] (3) Keep the reaction temperature at 65°C, react for 10 minutes, stir evenly until there is no solid in the liquid phase, then send the reaction solution to the crystallization tank;

[0076] (4) Add sodium silicate with a mass of 1% of the total mass of the mixed raw materials into the crystallization tank, cool the solution, and cool the crystallization temperature to 40°C to obtain crystals;

[0077] (5) After filtering and drying, the trisodium chlorinated phosphate product is...

Embodiment 2

[0079] (1) Mix trisodium phosphate, disodium hydrogen phosphate and sodium hypochlorite according to the molar ratio of sodium to phosphorus of 2.8:1, and the molar ratio of sodium hypochlorite to phosphate of 3.5:4 to obtain a raw material mixture; total phosphorus in the raw material mixture The content is: the mass fraction of phosphorus pentoxide is 0.090;

[0080] (2) Preheat the water in the salt tank to 70°C and add the raw material mixture described in step (1) to prepare a saturated solution;

[0081] (3) Keep the reaction temperature at 70°C, react for 15 minutes, stir evenly until there is no solid in the liquid phase, then send the reaction solution to the crystallization tank;

[0082] (4) Add sodium carbonate with a mass of 1.5% of the total mass of the mixed raw materials into the crystallization tank, cool the solution, and cool the crystallization temperature to 50°C to obtain crystals;

[0083] (5) After filtering and drying, the trisodium chlorinated phosphate produ...

Embodiment 3

[0085] (1) Mix trisodium phosphate, disodium hydrogen phosphate and sodium hypochlorite according to the molar ratio of sodium to phosphorus of 2.9:1, and the molar ratio of sodium hypochlorite to phosphate of 3.5:4 to obtain a raw material mixture; total phosphorus in the raw material mixture The content is: the mass fraction of phosphorus pentoxide is 0.095;

[0086] (2) Preheat the water in the salt tank to 75°C, and add the raw material mixture described in step (1) to prepare a saturated solution;

[0087] (3) Keep the reaction temperature at 75°C, react for 15 minutes, stir evenly until there is no solid in the liquid phase, then send the reaction solution to the crystallization tank;

[0088] (4) Add sodium metaaluminate with a mass of 1.5% of the total mass of the mixed raw materials into the crystallization tank, cool the solution, and cool the crystallization temperature to 60°C to obtain crystals;

[0089] (5) After filtering and drying, the trisodium chlorinated phosphate ...

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Abstract

The invention discloses a preparation technology for chlorinated trisodium phosphate, which mainly comprises the following steps: (1) uniformly mixing trisodium phosphate, disodium hydrogen phosphate and sodium hypochlorite according to mole ratio to obtain a raw material mixture; (2) preheating water in a salt melting trough, adding the raw material mixture obtained in the step (1) to prepare saturated solution; (3) maintaining the reaction temperature, uniformly stirring until no solid exists in the liquid phase, and sending reaction liquid into a crystallization trough; (4) adding additive in the crystallization trough, and cooling the solution to obtain crystal; (5) filtering, drying, obtaining chlorinated trisodium phosphate product, and crystallizing a mother liquor to be returned to the salt melting trough for recycling. The preparation technology is short in technological process, simple in needed equipment, short in investment, relatively lower in production cost, good in product quality of the gained chlorinated trisodium phosphate and good in stability; the effective chlorinity can reach 6%; the efficiency is high, and the environment can be protected; toxic waste water and waste gas do not be produced in the technological process; the problem that the tail gas containing chlorine is hard to dispose in the traditional technology is avoided.

Description

Technical field [0001] The invention relates to a production process of trisodium chlorinated phosphate, which belongs to the technical field of chemical industry. Background technique [0002] Trisodium chlorinated phosphate contains trisodium phosphate, which can be used directly as a detergent, and more than 3% sodium hypochlorite with sterilization and bleaching effects. It is an ideal additive for bleaching and disinfecting detergents. In addition, trisodium chlorinated phosphate can also be used as a water purifier, a fruit preservative and a cleaning and disinfecting agent for tableware and public facilities; it is widely used in hospitals, food processing, dairy plants, breweries, laundry shops and other industries Disinfection of equipment, cleaning and disinfection of restaurant and household tableware, purification of public water and drinking water in baths and swimming pools, cleaning and disinfection of waste cotton fabrics, removal of ink stains, blood stains, swea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/455C01B25/30
Inventor 廖吉星朱飞武彭宝林谢静张丽韩朝应
Owner GUIZHOU KAILIN GRP CO LTD