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Method for preparing sodium phosphate and barium chloride with cogeneration of powdery barium salt by using salting-out master liquid generated in zinc powder method

A sodium phosphate, zinc powder method technology, applied in chemical instruments and methods, thiosulfate/dithionite/polythionite, phosphorus compounds, etc., can solve the problem of low quality of recovered salt, secondary pollution, escaping and other problems, to achieve considerable economic benefits, pollution control, and simple equipment.

Inactive Publication Date: 2012-01-25
冯若愚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the hydrochloric acid neutralization method and the direct recovery method are the methods with simple technology and the least investment, but the hydrochloric acid neutralization method needs to consume a large amount of hydrochloric acid, which greatly increases the cost of recovering salt. Not only the quality of recovered salt is low, but also acidic, It has a certain impact on the production of hydrosulfite, and sulfur dioxide gas will escape during the reaction process, and it will also cause secondary pollution

Method used

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  • Method for preparing sodium phosphate and barium chloride with cogeneration of powdery barium salt by using salting-out master liquid generated in zinc powder method
  • Method for preparing sodium phosphate and barium chloride with cogeneration of powdery barium salt by using salting-out master liquid generated in zinc powder method

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Effect test

Embodiment 1

[0023] The method for preparing sodium phosphate and barium chloride co-production powder barium salt with the salting-out mother liquor in the zinc powder method comprises the following preparation steps:

[0024] Step A, put 1000 liters of salting-out mother liquor and barium phosphate solution in the zinc powder method into corrosion-resistant reactor 1 according to the mass ratio of pure substance 1: 0.95 (wherein containing 40Kg of sodium sulfite, 20Kg of sodium dithionite, sodium chloride 250Kg, calculated according to the mass ratio of sodium sulfite to barium phosphate 1:0.95, the mass ratio of sodium dithionite to barium phosphate 1:0.95, and the mass ratio of sodium chloride to barium phosphate 1:0.95, the required barium phosphate Be 294.5Kg), keep stirring; Reaction generates the mixed solution of sodium phosphate, barium chloride, barium sulfite barium dithionite;

[0025] Step B, filter the mixed solution obtained in step A with a filter 2;

[0026] Step C, with...

Embodiment 2

[0030] The method for preparing sodium phosphate and barium chloride co-production powder barium salt with the salting-out mother liquor in the zinc powder method comprises the following preparation steps:

[0031] Step A, put 1000 liters of salting-out mother liquor and barium phosphate solution in the zinc powder method into corrosion-resistant reactor 1 according to the mass ratio of pure substance 1: 1.71 (wherein containing sodium sulfite 40Kg, sodium dithionite 20Kg, sodium chloride 250Kg, calculated according to the mass ratio of sodium sulfite to barium phosphate 1:1.71, the mass ratio of sodium dithionite to barium phosphate 1:1.71, and the mass ratio of sodium chloride to barium phosphate 1:1.71, the required input chloride Barium is 530.1Kg), constantly stirring; Reaction generates the mixed solution of sodium phosphate, barium chloride, barium sulfite barium dithionite;

[0032] Step B, filter the mixed solution obtained in step A with a filter 2;

[0033] Step C,...

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Abstract

The invention belongs to the technical field of treatment and utilization of three wastes (waste gas, waste water and waste residues) in the chemical industry, and particularly relates to a method for preparing sodium phosphate and barium chloride with cogeneration of a powdery barium salt by using salting-out master liquid generated in a zinc powder method. In the invention, by mainly utilizing the salting-out master liquid, which is generated in a process of preparing sodium hydrosulfite by using the zinc powder method, for treating barium phosphate, not only can sodium phosphate, barium chloride and powdery barium salt products with economic values and better purity be produced, but also the three wastes are hardly discharged to cause pollution, and a semi-finished product of detergent can even be recycled for dissolving raw materials. The method disclosed by the invention not only has the advantage of simple production process and equipment and low cost, but also can be used for effectively treating the environment pollution caused by the salting-out master liquid generated when the zinc powder method is used for preparing the sodium hydrosulfite, and is beneficial to creation of considerable economic benefits at the same time.

Description

technical field [0001] The invention belongs to the technical field of comprehensive treatment and utilization of three wastes in the inorganic chemical industry, in particular to a method for preparing sodium phosphate and barium chloride to co-produce powdered barium salt from the salting-out mother liquor produced in the preparation of sodium hydrosulfite by zinc powder method. technical background [0002] Preparation of hydrosulfite (Na 2 S 2 o 4 2H 2 O, sodium dithionite) is a product obtained by first introducing sulfur dioxide into the zinc suspension, and then using sodium hydroxide for metathesis, filtration, salting out, dehydration, and drying. Its important use is as printing and dyeing reducing agent, pulp bleaching agent, etc. This method produces a large amount of salting-out mother liquor during the salting-out process, and an average of 7 to 8 cubic meters of mother liquor can be produced for every ton of sodium hydrosulfite produced. An enterprise wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/30C01F11/28C01F11/48C01B17/66
Inventor 王嘉兴
Owner 冯若愚
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