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

A manganese sulfate and sulfide technology, which is applied in the treatment and utilization of manganese-containing waste liquid, can solve problems such as waste of resources, achieve the effects of eliminating pollution, improving economic benefits, 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 manganese 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 manganese sulfide solution, and Make the ratio of the molar content sum of the sulf...

Embodiment 2

[0029] A method for preparing a mixed product of sulfide and sodium sulfide and manganese 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 manganese sulfide solution, and Make the ratio of the molar content sum of sulfate ...

Embodiment 3

[0036] A method for preparing a mixed product of sulfide and sodium sulfide and manganese 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 manganese sulfide solution, and Make the ratio of the molar content sum of the sulf...

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PUM

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Abstract

The invention provides a method for preparing sulfides and a mixed product of sodium sulfide and manganese sulfate by using a manganese-containing waste liquid. The method comprises the following steps: filtering the manganese-containing waste liquid obtained by producing p-dihydroxybenzene so as to obtain a filter cake containing simple substance residues; reacting the filter cake containing simple substance residues with excess sulfuric acid so as to obtain a solution containing calcium sulfate, magnesium sulfate, zinc sulfate, sodium sulfate, aluminum sulfate, cadmium sulfate and nickel sulfate, and mixing and reacting the solution with a magnesium sulfide solution so as to obtain a mixed solution of sulfides and magnesium sulfate, wherein the sulfides contain calcium sulfide, magnesium sulfide, zinc sulfide, sodium sulfide, aluminum sulfide, cadmium sulfide and nickel sulfide; filtering the mixed solution of the sulfides and zinc sulfate so as to obtain a mixed sulfide filter cake of calcium sulfide, magnesium sulfide, zinc sulfide, aluminum sulfide, cadmium sulfide and nickel sulfide and a filtrate containing sodium sulfide and manganese sulfate; washing, drying, performing cell separation and smashing the mixed sulfide filter cake so as to obtain sulfide products; and distilling the filtrate containing the mixed sodium sulfide and manganese sulfate under reduced pressure, and carrying out cooling crystallization so as to obtain the mixed product of sodium sulfide and manganese 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 manganese 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 prod...

Claims

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Application Information

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IPC IPC(8): C01B17/42C01G11/02C01G9/08C01G53/11C01F7/70C01B17/22C01G45/10
Inventor 王嘉兴
Owner 王莉