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Method for preparing mixed product of carbonate and magnesium sulfate from manganese-containing waste solution

A technology of magnesium sulfate and carbonate, which is applied in the field of treatment and utilization of manganese-containing waste liquid, can solve problems such as waste of resources, achieve the effects of eliminating pollution, reducing equipment investment, and improving economic benefits

Inactive Publication Date: 2011-08-03
何云
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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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Effect test

Embodiment 1

[0021] A method for preparing a mixed product of carbonate and magnesium 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:

[0022] 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;

[0023] 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 magnesium carbonate solution, and Make the molar content sum of the material of sulfate in the solut...

Embodiment 2

[0028] A method for preparing a mixed product of carbonate and magnesium 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:

[0029] 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;

[0030] 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 magnesium carbonate solution, and Make the ratio of the molar content sum of the sulfate material in...

Embodiment 3

[0035] A method for preparing a mixed product of carbonate and magnesium 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:

[0036] 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;

[0037] 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 magnesium carbonate solution, and Make the molar content sum of the material of sulfate in the solut...

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Abstract

The invention provides a method for preparing a mixed product of carbonate and magnesium sulfate from a manganese-containing waste solution. The method comprises the following steps of: firstly, extracting and filtering the manganese-containing waste solution obtained in production of hydroquinone to obtain a clear filter liquor including manganese sulfate, magnesium sulfate and sulfuric acid as well as filter cakes including elemental residues, reacting the filter cakes including elemental residues with excessive sulfuric acid to obtain a solution including calcium sulfate, magnesium sulfate, zinc sulfate, sodium sulfate, aluminum sulfate, cadmium sulfate and nickel sulfate; secondly, mixing and reacting the solution with magnesium carbonate to obtain a mixed solution of carbonate and magnesium sulfate as well as the carbonate including calcium carbonate, zinc carbonate, sodium carbonate, aluminum carbonate, cadmium carbonate and nickel carbonate; thirdly, filtering the mixed solution of carbonate and magnesium sulfate to obtain calcium carbonate filter cakes and a filter liquor including carbonate and magnesium sulfate, washing, drying and crashing the carbonate filter cakes to obtain a calcium carbonate product; finally, decompressing and distilling, cooling and crystallizing the filter liquor including carbonate and magnesium sulfate to obtain the mixed product of carbonate and magnesium sulfate.

Description

technical field [0001] The invention relates to the technical field of treatment and utilization of manganese-containing waste liquid, especially a method for preparing a mixed product of carbonate and magnesium sulfate with manganese-containing waste liquid. The manganese-containing waste liquid is manganese-containing waste obtained from the production of hydroquinone liquid. 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 chem...

Claims

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Application Information

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IPC IPC(8): C01F11/18C01G9/00C01D7/00C01F7/00C01G11/00C01G53/06C01F5/40
Inventor 何云
Owner 何云
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