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Method for co-production of manganese hydroxide, sodium sulfate and ammonia water from manganese-containing waste liquid generated during hydroquinone production

A technology of hydroquinone and manganese hydroxide, applied in manganese oxide/manganese hydroxide, chemical instruments and methods, preparation/separation of ammonia, etc.

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 hydroxide and co-producing sodium sulfate and ammonia 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

[0020] A kind of method that produces manganese hydroxide co-production sodium sulfate and ammoniacal liquor with the manganese-containing waste liquid that produces hydroquinone, comprises following preparation steps:

[0021] Step A, 1000kg (wherein, comprising 120kg manganese sulfate, 15kg ammonium sulfate and 20kg sulfuric acid) waste liquid produced by producing hydroquinone is suction-filtered with a suction filter;

[0022] Step B, using the elemental residue filter cake obtained by suction filtration in step A to develop other products;

[0023] Step C, transfer the obtained filtrate of suction filtration in the step A to the reactor, drop into the sodium hydroxide solution to react simultaneously, the mass ratio between the described filtrate and the sodium hydroxide solution is 1: 0.33; the reaction generates manganese hydroxide and Mixture I of sodium sulfate and ammonia;

[0024] Step D, filtering the mixture I obtained in step C with a filter;

[0025] Step E, t...

Embodiment 2

[0029] A kind of method that produces manganese hydroxide co-production sodium sulfate and ammoniacal liquor with the manganese-containing waste liquid that produces hydroquinone, comprises following preparation steps:

[0030] Step A, 1000kg (wherein, comprising 120kg manganese sulfate, 15kg ammonium sulfate and 20kg sulfuric acid) waste liquid produced by producing hydroquinone is suction-filtered with a suction filter;

[0031] Step B, using the elemental residue filter cake obtained by suction filtration in step A to develop other products;

[0032] Step C, the filtrate obtained by suction filtration in step A is transferred to the reactor, and sodium hydroxide solution is dropped into the reaction at the same time, the mass ratio between the filtrate and the sodium hydroxide solution is 1: 0.53; the reaction generates manganese hydroxide and Mixture I of sodium sulfate and ammonia;

[0033] Step D, filtering the mixture I obtained in step C with a filter;

[0034] Step ...

Embodiment 3

[0038] A kind of method that produces manganese hydroxide co-production sodium sulfate and ammoniacal liquor with the manganese-containing waste liquid that produces hydroquinone, comprises following preparation steps:

[0039] Step A, 1000kg (wherein, comprising 120kg manganese sulfate, 15kg ammonium sulfate and 20kg sulfuric acid) waste liquid produced by producing hydroquinone is suction-filtered with a suction filter;

[0040] Step B, using the elemental residue filter cake obtained by suction filtration in step A to develop other products;

[0041] Step C, the filtrate obtained by suction filtration in step A is transferred to the reactor, and the sodium hydroxide solution is dropped into the reaction at the same time, the mass ratio between the filtrate and the sodium hydroxide solution is 1: 0.73; the reaction generates manganese hydroxide and Mixture I of sodium sulfate and ammonia;

[0042] Step D, filtering the mixture I obtained in step C with a filter;

[0043] S...

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PUM

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Abstract

The utility model 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 hydroxide, sodium sulfate and ammonia water 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 carbonate product; and the filtrate is further distilled under a reduced pressure and then deep-processed to obtain a sodium sulfate product and an ammonia water 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 hydroxide, sodium sulfate and ammonia water. 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 hydroxide and co-producing sodium sulfate and ammonia water 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 mangan...

Claims

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Application Information

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IPC IPC(8): C01G45/02C01D5/06C01C1/02C02F1/58C02F1/64
Inventor 何云
Owner 何云