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Method for co-production of manganese sulfide, magnesium sulfate and ammonium sulfide from manganese-containing waste liquid generated during hydroquinone production

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

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 magnesium 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 magnesium sulfate and ammonium sulfide with manganese-containing waste liquid produced by 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 magnesium sulfide solution for reaction, the mass ratio between the filtrate and the magnesium sulfide solution is 1: 0.17; the reaction generates manganese sulfide, magnesium sulfate and ammonium sulfide Mixture I;

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

[0026] Step E, washing and dryin...

Embodiment 2

[0031] A method for producing manganese sulfide and co-producing magnesium sulfate and ammonium sulfide with manganese-containing waste liquid produced by 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 magnesium sulfide solution for reaction, the mass ratio between the filtrate and the magnesium sulfide solution is 1: 0.37; the reaction generates manganese sulfide, magnesium sulfate and ammonium sulfide Mixture I;

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

[0036] Step E, the filter cake o...

Embodiment 3

[0041] A method for producing manganese sulfide and co-producing magnesium sulfate and ammonium sulfide with manganese-containing waste liquid produced by 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 magnesium sulfide solution for reaction, the mass ratio between the filtrate and the magnesium sulfide solution is 1: 0.57; the reaction generates manganese sulfide, magnesium sulfate and ammonium sulfide Mixture I;

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

[0046] Step E, washing and dryin...

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Abstract

The invention relates to the technical field of utilization of manganese-containing waste liquid generated during the production of hydroquinone, in particular to a method for co-production of manganese sulfide, magnesium sulfate and ammonium sulfide from manganese-containing waste liquid generated during the hydroquinone production. The method mainly comprises the following steps: firstly the waste liquid generated during the hydroquinone production is filtered by a filtering machine to produce a filtrate, the filtrate is distilled and filtered to produce a filter cake and a filtrate, and the filter cake is deep-processed to obtain a manganese sulfide product; and the filtrate is further distilled under a reduced pressure and then deep-processed to obtain a magnesium sulfate product and an ammonium sulfide product respectively. The method can not only completely eliminate the waste liquid to reduce the environmental pollution due to the waste liquid but also provide the valuable products of manganese sulfide, magnesium sulfate and ammonium sulfide. The method not only has significant social and economic benefits but also simplifies the production process and the production equipment, and is a relatively practical method for treatment and utilization.

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 magnesium 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 ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/00C01C1/20C01F5/40C02F1/58C02F1/64
Inventor 何云
Owner 何云
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