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Method for preparing carbonate and strontium sulfate mixed product from manganese-containing waste liquid

A carbonate and strontium sulfate 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, reducing equipment investment, and improving economic benefits

Inactive Publication Date: 2011-07-13
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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Examples

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Effect test

Embodiment 1

[0022] A method for preparing a mixed product of carbonate and strontium sulfate from a manganese-containing waste liquid, the manganese-containing waste liquid being 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 strontium carbonate solution, and Make the molar content sum of the material of sulfate in the solution...

Embodiment 2

[0029] A method for preparing a mixed product of carbonate and strontium sulfate from a manganese-containing waste liquid, the manganese-containing waste liquid being 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 strontium carbonate solution, and Make the molar content sum of the material of sulfate in the solution...

Embodiment 3

[0036] A method for preparing a mixed product of carbonate and strontium sulfate from a manganese-containing waste liquid, the manganese-containing waste liquid being 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 strontium carbonate solution, and Make the molar content sum of the material of sulfate in the solution...

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Abstract

The invention provides a method for preparing a carbonate and strontium sulfate mixed product from manganese-containing waste liquid, comprising the steps of: leaching manganese-containing waste liquid obtained from hydroquinone production to obtain clear filter liquor containing manganese sulfate, ammonium sulfate and sulfuric acid and a filter cake containing elementary-substance residues; making the filter cake containing elementary-substance residues react with an excessive amount of sulfuric acid to obtain a solution containing calcium sulfate, manganese sulfate, zinc sulfate, sodium sulfate, aluminum sulfate, cadmium sulfate and nickel sulfate; then making the obtained solution react with a strontium carbonate solution to obtain a strontium sulfate and carbonate mixed solution containing calcium carbonate, manganese carbonate, zinc carbonate, sodium carbonate, aluminum carbonate, cadmium carbonate and nickel carbonate; filtering to obtain a calcium carbonate filter cake and a filer liquor containing the carbonate and the strontium sulfate; washing, drying and crushing the calcium carbonate filter cake to obtain a calcium carbonate product; and carrying out reduced-pressure distillation and cooling crystallization on the filter liquor containing the carbonate and the strontium sulfate to obtain the carbonate and strontium sulfate mixed product.

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 strontium 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): C01F11/18C01F5/24C01G9/00C01D7/00C01F7/00C01G11/00C01G53/06C01F11/46
Inventor 何云
Owner 何云
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