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Method for preparing manganese sulfide coproduced with lithium sulfate and ammonium sulfide by using manganese-containing waste liquor produced during production of hydroquinone

A technology of hydroquinone and ammonium sulfide, applied in chemical instruments and methods, ammonium sulfide/polysulfide, lithium sulfate/sulfite, etc., to achieve simple process and production equipment, significant social and economic benefits , the effect of reducing pollution

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

AI Technical Summary

Problems solved by technology

However, there is no relevant report on the method of producing manganese sulfide and co-producing lithium sulfate and ammonium sulfide with the manganese-containing waste liquid produced by the production of hydroquinone.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for producing manganese sulfide and co-producing lithium sulfate and ammonium sulfide with manganese-containing waste liquid produced by producing hydroquinone, comprising the following preparation steps:

[0022] Step A, 1000kg waste liquid (wherein, comprising 120kg manganese sulfate, 15kg ammonium sulfate and 20kg sulfuric acid) produced by hydroquinone is suction filtered with a suction filter;

[0023] Step B, using the elemental residue filter cake obtained by suction filtration in step A to develop other products;

[0024] Step C, transfer the filtrate obtained by suction filtration in step A to the reactor, and simultaneously drop into the lithium sulfide solution for reaction, the mass ratio between the filtrate and the lithium sulfide solution is 1: 0.11; the reaction generates manganese sulfide, lithium sulfate and ammonium sulfide Mixture I;

[0025] Step D, filtering the mixture I obtained in step C with a filter;

[0026] Step E, the filter cake...

Embodiment 2

[0031] A method for producing manganese sulfide and co-producing lithium sulfate and ammonium sulfide with manganese-containing waste liquid produced by producing hydroquinone, comprising the following preparation steps:

[0032] Step A, 1000kg waste liquid (wherein, comprising 120kg manganese sulfate, 15kg ammonium sulfate and 20kg sulfuric acid) produced by hydroquinone is suction filtered with a suction filter;

[0033] Step B, using the elemental residue filter cake obtained by suction filtration in step A to develop other products;

[0034] Step C, transfer the filtrate obtained by suction filtration in step A to the reactor, and simultaneously drop into the lithium sulfide solution for reaction, the mass ratio between the filtrate and the lithium sulfide solution is 1: 0.31; the reaction generates manganese sulfide, lithium sulfate and ammonium sulfide Mixture I;

[0035] Step D, filtering the mixture I obtained in step C with a filter;

[0036] Step E, washing and dry...

Embodiment 3

[0041] A method for producing manganese sulfide and co-producing lithium sulfate and ammonium sulfide with manganese-containing waste liquid produced by producing hydroquinone, comprising the following preparation steps:

[0042] Step A, 1000kg waste liquid (wherein, comprising 120kg manganese sulfate, 15kg ammonium sulfate and 20kg sulfuric acid) produced by hydroquinone is suction filtered with a suction filter;

[0043] Step B, using the elemental residue filter cake obtained by suction filtration in step A to develop other products;

[0044] Step C, transfer the filtrate obtained by suction filtration in step A to the reactor, and simultaneously drop into the lithium sulfide solution for reaction, the mass ratio between the filtrate and the lithium sulfide solution is 1:0.51; the reaction generates manganese sulfide, lithium sulfate and ammonium sulfide Mixture I;

[0045] Step D, filtering the mixture I obtained in step C with a filter;

[0046] Step E, the filter cake ...

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Abstract

The invention relates the technical filed of utilization of manganese-containing waste liquor produced during production of hydroquinone, in particular to a method for preparing manganese sulfide coproduced with lithium sulfate and ammonium sulfide by using the manganese-containing waste liquor produced during production of hydroquinone. The method mainly comprises the following steps of: performing suction filtration on the waste liquor produced by the hydroquinone by using a suction filter machine to obtain filtrate, distilling and filtering the filtrate, and performing deep processing on a filter cake to obtain a manganese sulfide product; and distilling the filtrate under a reduced pressure and performing further deep processing on the filtrate respectively to obtain a lithium sulfate product and an ammonium sulfide product respectively. By adopting the method, the waste liquor can be treated completely, environmental pollution caused by waste liquor is relieved, valuable manganese sulfide, lithium sulfate and ammonium sulfide products can be prepared, remarkable social benefit and economic benefit are achieved, and process and production equipment are simple. The method is a relatively practical treatment and utilization method.

Description

technical field [0001] The invention relates to the technical field of utilization of manganese-containing waste liquid produced in the production of hydroquinone, in particular to a method for producing manganese sulfide and co-producing lithium sulfate and ammonium sulfide with the manganese-containing waste liquid produced in the production of hydroquinone. technical background [0002] Hydroquinone is an important organic intermediate, which was developed and put into industrial production in my country in the 1970s. 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 chemical composition in the mang...

Claims

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Application Information

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IPC IPC(8): C01G45/00C01C1/20C01D15/06C02F1/58C02F1/64
Inventor 何云
Owner 何云
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