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Treatment method for waste manganese slag generated in hydroquinone production by means of aniline process

A technology of hydroquinone and treatment method, which is applied in the field of waste manganese sludge treatment, and can solve problems such as insufficient recovery of valuable elements in manganese sludge, environmental pollution, and difficulty in decomposing manganese sludge

Inactive Publication Date: 2012-10-10
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

[0003] At present, the usual method of processing this waste manganese mud is to landfill it, and the landfill treatment method has the following deficiencies: 1. Valuable elements in the manganese mud are not fully recovered, which wastes resources; Land resources; 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

[0026] Select an appropriate amount of waste manganese mud raw material for processing:

[0027] A. Use a crusher to break the waste manganese mud into small pieces with a diameter of 0.1-1cm;

[0028] 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;

[0029] 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;

[0030] D, in the second fil...

Embodiment 2

[0036]Choose the same raw material, wherein the A-E steps are the same, and the proportioning of the parts by weight of each substance in the alkaline solution in the step F is: 10wt% ammonia solution: methanol: water=1: 5: 15, and then add tetramethoxy Silane and tetraethoxysilane, wherein the mass ratio of tetramethoxysilane and tetraethoxysilane is 1:3, and the weight ratio of tetramethoxysilane and alkaline solution 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. In step F, the undissolved impurities are mixed with the high-temperature boiler waste slag at a weight ratio of 1:2, wherein the temperature of the 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 minutes .

Embodiment 3

[0038] Choose the same raw material, wherein the steps A-E are the same, and the proportioning of the parts by weight of the substances in the alkaline solution in the step F is: 10wt% ammonia solution: methanol: water=1: 9: 30, but then add tetramethoxy base silane and tetraethoxysilane, wherein the mass ratio of tetramethoxysilane and tetraethoxysilane is 1:2, and the weight ratio of tetramethoxysilane and alkaline solution is: 1.5:10. Wherein 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 22Mpa by a carbon dioxide pump. Wherein in step F, undissolved impurities and high-temperature boiler waste residue are mixed at a weight ratio of 1:1-2, wherein the temperature of high-temperature boiler waste residue is 800-1000°C, the calcination temperature is controlled between 450-500°C, and the calcination time is 60 ~80 minutes.

[0039] After testing, the manganese chloride, ferrous chloride and silica pu...

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Abstract

The invention relates to a treatment method for waste manganese slag generated in hydroquinone production by means of an aniline process. The waste manganese slag contains manganese salt, magnesium salt, iron, silica and a small amount of organics, manganese chloride, ferrous chloride and silica in waste can be extracted after the waste manganese slag is treated, and the treated waste and waste residue, after calcined, can be used as building materials. The treatment method for the waste manganese slag generated in the hydroquinone production by means of the aniline process is high in extract purity and few in steps, and the treated waste is free of pollution and meets requirements on environmental protection completely.

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, except for part of the manganese ore powder that did not participate in the reaction, Also contains magnesium salts, iron powder, silicon dioxide, and a small amount of organic matter. [0003] At present, the usual method of processing this waste manganese mud is to landfill it, and the landfill treatment method has the following deficiencies: 1. The valuable elements in the manganese mud are not fully recovered, which wastes resources; Land resources; 3. Organic matter in manganese mud is difficult to decompose under natural condi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/18C01G45/06C01G49/10
CPCY02P20/54Y02P40/10
Inventor 高士敬周治华时疆
Owner 湖北开元化工科技股份有限公司
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