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Method for preparing phosphate and mixed product of sodium phosphate and cobalt sulfate by manganese-containing waste liquid

A technology of cobalt sulfate and sodium phosphate is applied in the field of treatment and utilization of manganese-containing waste liquid, which can solve problems such as waste of resources, and achieve the effects of eliminating pollution, simple operation and improving economic benefits.

Inactive Publication Date: 2011-07-06
王莉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, other chemical constituents in hydroquinone are not utilized, thereby wasting resources

Method used

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  • Method for preparing phosphate and mixed product of sodium phosphate and cobalt sulfate by manganese-containing waste liquid

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Effect test

Embodiment 1

[0022] The method for preparing phosphate and sodium phosphate and cobalt sulfate mixed product with manganese-containing waste liquid, described manganese-containing waste liquid is the manganese-containing waste liquid obtained from producing hydroquinone, comprising the following specific steps:

[0023] Step A: Suction filtration of 500 kg of manganese-containing waste liquid obtained from the production of hydroquinone to obtain a clarified filtrate containing manganese sulfate, ammonium sulfate, sulfuric acid and a filter cake containing elemental residues, and the filtrate will be developed into other products;

[0024] Step B: the filter cake containing elemental residue is reacted with excess sulfuric acid to obtain a solution containing calcium sulfate, magnesium sulfate, zinc sulfate, sodium sulfate, aluminum sulfate, cadmium sulfate and nickel sulfate, and then mixed with cobalt phosphate solution, and Make the ratio of the sum of the molar contents of sulfate subst...

Embodiment 2

[0029] The method for preparing phosphate and sodium phosphate and cobalt sulfate mixed product with manganese-containing waste liquid, described manganese-containing waste liquid is the manganese-containing waste liquid obtained from producing hydroquinone, comprising the following specific steps:

[0030] Step A: Suction filtration of 500 kg of manganese-containing waste liquid obtained from the production of hydroquinone to obtain a clarified filtrate containing manganese sulfate, ammonium sulfate, sulfuric acid and a filter cake containing elemental residues, and the filtrate will be developed into other products;

[0031] Step B: the filter cake containing elemental residue is reacted with excess sulfuric acid to obtain a solution containing calcium sulfate, magnesium sulfate, zinc sulfate, sodium sulfate, aluminum sulfate, cadmium sulfate and nickel sulfate, and then mixed with cobalt phosphate solution, and Make the ratio of the molar content sum of the sulfate material ...

Embodiment 3

[0036] The method for preparing phosphate and sodium phosphate and cobalt sulfate mixed product with manganese-containing waste liquid, described manganese-containing waste liquid is the manganese-containing waste liquid obtained from producing hydroquinone, comprising the following specific steps:

[0037] Step A: Suction filtration of 500 kg of manganese-containing waste liquid obtained from the production of hydroquinone to obtain a clarified filtrate containing manganese sulfate, ammonium sulfate, sulfuric acid and a filter cake containing elemental residues, and the filtrate will be developed into other products;

[0038] Step B: the filter cake containing elemental residue is reacted with excess sulfuric acid to obtain a solution containing calcium sulfate, magnesium sulfate, zinc sulfate, sodium sulfate, aluminum sulfate, cadmium sulfate and nickel sulfate, and then mixed with cobalt phosphate solution, and Make the ratio of the molar content sum of the sulfate material ...

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Abstract

The invention provides a method for preparing phosphate and mixed product of sodium phosphate and cobalt sulfate by manganese-containing waste liquid, which comprises the steps of: leaching the manganese-containing waste liquid obtained by producing hydroquinone, and obtaining clear filtrate containing manganese sulfate, ammonium sulfate and sulfuric acid as well as a filter cake containing simple substance residue; leading the filter cake containing simple substance residue to have reaction with the excess sulfuric acid, and obtaining solution containing calcium sulfate, magnesium sulfate, zinc sulfate, sodium sulfate, aluminum sulfate, cadmium sulfate and nickel sulfate; then, mixing the obtained solution and cobalt phosphate solution for reaction, and obtaining mixed solution of the cobalt sulfate and the phosphate containing calcium phosphate, magnesium phosphate, zinc phosphate, sodium phosphate, aluminium phosphate, cadmium phosphate and nickel phosphate; filtering the obtained mixed solution, and obtaining a mixed phosphate filter cake of the calcium phosphate, magnesium phosphate, zinc phosphate, aluminium phosphate, cadmium phosphate and nickel phosphate as well as filtrate containing the sodium phosphate and the cobalt sulfate; washing, drying, grinding and carrying out fractionation on the mixed phosphate filter cake, and obtaining a sulfide product; and finally, carrying out reduced pressure distillation and cooling crystallization on the filtrate containing the sodium phosphate and the cobalt sulfate, and obtaining the mixed product of the sodium phosphate and the cobalt sulfate.

Description

technical field [0001] The present invention relates to the technical field of treatment and utilization of manganese-containing waste liquid, especially the method for preparing phosphate and sodium phosphate cobalt sulfate mixed product with manganese-containing waste liquid. The manganese-containing waste liquid is obtained from producing hydroquinone containing manganese waste. Background technique [0002] Hydroquinone is an important organic intermediate, which was developed in my country in the 1970s and has been put into industrial production. At present, hydroquinone is mainly produced by the aniline-manganese dioxide process in China. Compared with the foreign phenol-hydrogen peroxide process, this process has the advantages of high product purity and less impurities. But its disadvantage is that the discharge of waste liquid is large. Under normal conditions, there are about 40 tons of manganese-containing wastewater for every ton of hydroquinone produced. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/37C01B25/36C01B25/34C01B25/32C01B25/30C01G51/10
Inventor 王嘉兴
Owner 王莉