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Method for preparing sulfide and mixed product of sodium sulfide and lithium sulfate by manganese-containing waste liquid

A technology of sulfide and lithium sulfate, applied in the field of treatment and utilization of manganese-containing waste liquid, can solve problems such as waste of resources, and achieve the effects of eliminating pollution, less equipment investment and simple operation.

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

AI Technical Summary

Problems solved by technology

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for preparing a mixed product of sulfide and sodium sulfide and lithium sulfate with manganese-containing waste liquid, wherein the manganese-containing waste liquid is the manganese-containing waste liquid obtained from the production of 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 lithium sulfide solution, and Make the ratio of the molar content sum of the sulfate ...

Embodiment 2

[0029] A method for preparing a mixed product of sulfide and sodium sulfide and lithium sulfate with manganese-containing waste liquid, wherein the manganese-containing waste liquid is the manganese-containing waste liquid obtained from the production of 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 lithium sulfide solution, and Make the ratio of the molar content sum of sulfate subs...

Embodiment 3

[0036] A method for preparing a mixed product of sulfide and sodium sulfide and lithium sulfate with manganese-containing waste liquid, wherein the manganese-containing waste liquid is the manganese-containing waste liquid obtained from the production of 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 lithium sulfide solution, and Make the ratio of the molar content sum of the sulfate ...

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PUM

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Abstract

The invention provides a method for preparing sulfide and mixed product of sodium sulfide and lithium 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 the 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 lithium sulfide solution for reaction, and obtaining mixed solution of the lithium sulfate and the sulfide containing calcium sulfide, magnesium sulfide, zinc sulfide, sodium sulfide, aluminium sulfide, cadmium sulfide and nickel sulfide; filtering the obtained mixed solution, and obtaining a mixed sulfide filter cake of the calcium sulfide, the magnesium sulfide, the zinc sulfide, the aluminium sulfide, the cadmium sulfide and the nickel sulfide as well as filtrate containing the sodium sulfide and the lithium sulfate; washing, drying, carrying out fractionation on the sulfide filter cake and grinding the sulfide filter cake, and obtaining the sulfide product; and finally, carrying out reduced pressure distillation and cooling crystallization on the filtrate containing the sodium sulfide and the lithium sulfate, and obtaining the mixed product of the sodium sulfide and the lithium sulfate.

Description

technical field [0001] The invention relates to the technical field of treatment and utilization of manganese-containing waste liquid, in particular to a method for preparing mixed products of sulfide and sodium sulfide and lithium sulfate with manganese-containing waste liquid. The manganese-containing waste liquid is obtained from the production of 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 produc...

Claims

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Application Information

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IPC IPC(8): C01B17/42C01G9/08C01F7/70C01G11/02C01G53/11C01B17/22C01D15/06
Inventor 王嘉兴
Owner 王莉
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