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Method for treating waste manganese mud generated during production of hydroquinone by aniline process

A hydroquinone and treatment method technology, applied in the field of waste manganese sludge treatment, can solve the problems of waste of resources, insufficient recycling, environmental pollution, etc.

Inactive Publication Date: 2012-07-18
湖北开元化工科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Valuable elements in manganese mud have not been fully recovered, wasting resources;
[0005] 2. Stacking and storing manganese mud takes up a lot of land resources;
[0006] 3. Organic matter in manganese mud is difficult to decompose under natural conditions, causing serious environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Select an appropriate amount of waste manganese mud raw material for processing:

[0030] A. Use a crusher to break the waste manganese mud into small pieces with a diameter of 0.1-1cm;

[0031] B. Add the crushed pieces to excess hydrochloric acid solution to react hydrochloric acid with manganese salt, magnesium salt and iron to generate manganese chloride, magnesium chloride and ferrous chloride; filter the reaction solution to obtain silicon dioxide as the main component The first filter cake of, and be mainly the first filtrate of ferrous chloride, magnesium chloride and manganese chloride;

[0032] C, add excessive sodium sulfide in the first filtrate, stir reaction, make it generate manganese sulfide precipitation, ferrous sulfide precipitation, obtain the second filter cake that contains manganese sulfide, ferrous sulfide after filtration, and contain chloride ion, magnesium A second filtrate of ions, sodium ions and sulfide ions;

[0033] D, in the second fil...

Embodiment 2

[0039] Choose the same raw material, wherein the steps of A-E are the same, and the proportion of parts by weight of each substance in the alkaline solution in the step F is: 10wt% ammonia solution: methanol: water=1: 5: 15, but then add tetramethoxy Silane and tetraethoxysilane, wherein the mass ratio of tetramethoxysilane and tetraethoxysilane is 1:3, the sum of the quality of tetramethoxysilane and tetraethoxysilane and the weight ratio of alkaline solution The ratio is: 1:5. In step G, the temperature of the autoclave is raised to 200° C. by a heater, and the pressure of the autoclave is raised to 30 MPa by a carbon dioxide pump. Wherein in step H, undissolved impurities are mixed with high-temperature boiler waste slag at a weight ratio of 1:2, wherein the temperature of high-temperature boiler waste slag is 900-1000°C, the calcination temperature is controlled between 500-600°C, and the calcination time is 60-90°C. minute.

Embodiment 3

[0041] Choose the same raw material, wherein the steps of A-E are the same, and the proportion of parts by weight of each substance in the alkaline solution in the step F is: 10wt% ammonia solution: methanol: water=1: 9: 30, but then add tetramethoxy Silane and tetraethoxysilane, wherein the mass ratio of tetramethoxysilane and tetraethoxysilane is 1:2, the mass ratio between the tetramethoxysilane and tetraethoxysilane and the alkaline solution The weight ratio is: 1.5:10. In step G, the temperature of the autoclave is raised to 190° C. by a heater, and the pressure of the autoclave is raised to 22 MPa by a carbon dioxide pump. In step F, undissolved impurities are mixed with high-temperature boiler waste slag at a weight ratio of 1:1, wherein the temperature of high-temperature boiler waste slag is 800-1000°C, the calcination temperature is controlled between 450-500°C, and the calcination time is 60-80°C. minute.

[0042] After testing, the manganese chloride, ferrous chl...

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Abstract

The invention relates to a method for treating waste manganese mud generated during production of hydroquinone by aniline process, wherein the manganese mud contains manganese salt, magnesium salt, iron, silica and a little organic matter; manganese chloride, iron chloride and silica can be extracted from the waste material after treatment; and the waste material and waste residue subjected to the treatment can be used as building materials after being roasted. According to the invention, substances extracted with the method provided by the invention have high purity; the steps are simple; the treated waste materials have no pollution; therefore, the method conforms to the requirements on environmental friendliness.

Description

technical field [0001] The invention relates to a method for processing waste manganese mud, in particular to a method for processing waste manganese and niobium produced by aniline method to produce hydroquinone. Background technique [0002] In the process of producing hydroquinone by the aniline method, in order to ensure the yield of hydroquinone, excessive manganese ore powder is used. In the waste manganese mud obtained after the reaction, in addition to part of the manganese ore powder that did not participate in the reaction, there is also Contains magnesium salts, iron powder, silicon dioxide, and a small amount of organic matter. [0003] The present common method of processing this waste manganese mud is to landfill it, and the landfill processing method has the following deficiencies: [0004] 1. Valuable elements in manganese mud have not been fully recovered, wasting resources; [0005] 2. Stacking and storing manganese mud takes up a lot of land resources; ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/10C01G45/06C01B33/12C04B7/24C04B7/28
CPCY02P20/54Y02P40/10
Inventor 高士敬周治平时疆
Owner 湖北开元化工科技股份有限公司
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