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Mercury removal agent with copper sulfide and method for preparing mercury removal agent

A copper sulfide and mercury removal technology, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of complex method steps, limited content of active components in products, and low mercury content, and achieve The effect of preventing microstructure collapse, good workshop operating environment, and high mercury capacity

Inactive Publication Date: 2017-01-11
XIAN SUNWARD AEROSPACE MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main problems in the field of copper sulfide mercury removal agents are: how to sulfide the copper-containing precursor to prepare highly active copper sulfide and how to increase the content of copper sulfide in the product to increase the mercury capacity.
When the above-mentioned impregnation method is used to prepare copper sulfide mercury removal agent, the method steps are relatively complicated, and the prepared product has limited content of active components and low mercury content.

Method used

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  • Mercury removal agent with copper sulfide and method for preparing mercury removal agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Configure sodium sulfide solution 11.0L, where S 2- The ion concentration is 0.1mol / L; the metal salt solution is 10.0L, wherein copper nitrate is 0.1mol / L, then the copper nitrate solution is added to the sodium sulfide solution at normal temperature, and when the pH is 7, the reaction is stopped, and the resulting product is filtered, Wash and dry at 50°C to obtain active copper sulfide.

[0035] After uniformly mixing 10 parts of active copper sulfide, 85 parts of pseudoboehmite and 10 parts of water, put it into a rolling ball machine and roll it, and spray into silica sol with a solid content of 20%. The particle size of the silica sol used is 8nm, and the amount of silica sol It is 30% of the mass of the mixture, rolled into a spherical object, and dried to obtain a finished mercury removal agent with a diameter of 2 to 5 mm.

Embodiment 2

[0037] Prepare 2.3L of sodium sulfide solution, in which the S2- ion concentration is 0.5mol / L; 10.0L of metal salt solution, including 0.1mol / L of copper nitrate and 0.002mol / L of iron nitrate, and then add the copper salt solution to sulfide at 50°C In the sodium solution, when the pH is 9, the reaction is stopped, the obtained product is filtered, washed, and dried at 50°C to obtain active copper sulfide.

[0038] After uniformly mixing 20 parts of active copper sulfide, 68 parts of α-aluminum hydroxide and 10 parts of water, put it into a rolling ball machine and roll it, and spray into silica sol with a solid content of 30%. The particle size of the silica sol used is 15nm. The dosage is 45% of the mass of the mixture, rolled into a spherical shape, and dried to obtain a finished mercury removal agent with a diameter of 3-5 mm.

Embodiment 3

[0040] Prepare 2.0L of ammonium sulfide solution, in which the S2- ion concentration is 2mol / L; 6.0L of metal salt solution, in which copper sulfate is 0.5mol / L, iron sulfate is 0.02mol / L, magnesium sulfate is 0.08mol / L, and then Add the copper salt solution into the sodium sulfide solution, stop the reaction when the pH is 10, filter and wash the obtained product, and dry at 70°C to obtain active copper sulfide.

[0041] After uniformly mixing 45 parts of active copper sulfide, 50 parts of quick-release powder and 10 parts of water, put it into a rolling ball machine and roll it, spray into silica sol with a solid content of 20%, the particle size of the silica sol used is 40nm, and the amount of silica sol is 33% of the mass of the mixture, rolled into a spherical object, and dried to obtain a finished mercury removal agent with a diameter of 2 to 4 mm.

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Abstract

The invention belongs to the field of mercury removal agents, and particularly relates to a mercury removal agent with copper sulfide and a method for preparing the mercury removal agent. The mercury removal agent with the copper sulfide comprises, by weight, 10%-45% of the active copper sulfide, 0%-7% of structural auxiliaries, 50%-85% of carriers and 3%-12% of binders. The mercury removal agent and the method have the advantages that active components in the mercury removal agent with the copper sulfide are prepared by the aid of co-precipitation processes, and the copper sulfide is high in activity and is high in mercury capacity and mercury removal precision when used for removing mercury; the structural auxiliaries are added into the copper sulfide, accordingly, defect sites of copper sulfide crystals can be increased, the quantities of active S2- can be increased, and the mercury removal activity of the copper sulfide further can be improved; the silica sol binders are added into the copper sulfide, the strength of products can be greatly improved, collapse of micro-structures of catalysts can be prevented in service procedures, accordingly, the integrity of the integral structure of the mercury removal agent can be guaranteed, and the mercury removal agent is low in pulverization rate.

Description

technical field [0001] The invention belongs to the field of mercury removal agents, and in particular relates to a copper sulfide mercury removal agent and a preparation method thereof. Background technique [0002] Mercury has low melting and boiling points and high volatility. In the process of fossil energy utilization, mercury will be discharged along with waste water and waste gas, causing serious environmental pollution. And because mercury is accumulative in organisms, it will eventually accumulate in the human body through the food chain, seriously endangering human health. In addition, in the industrial production process, mercury has serious hazards, which will cause corrosion and perforation of aluminum heat exchangers, poison downstream catalysts, and reduce catalyst life. Therefore, how to effectively remove mercury has become an urgent problem to be solved in the process of industrial production and environmental governance. [0003] Among the current mercu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04B01J27/043C10L3/10
CPCB01J27/04B01J27/043B01J37/031C10L3/101
Inventor 许龙龙李平利冯毅敏彭东贺强尚克家
Owner XIAN SUNWARD AEROSPACE MATERIAL CO LTD
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