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Preparation process of composite copper powder catalyst

A preparation process and catalyst technology, which is applied in the field of preparation process of composite copper powder catalyst, can solve the problems of difficult accurate and reasonable adjustment of particle size distribution, low selectivity of dimethyldichlorosilane, and insufficient development of particle surface, etc., to achieve atomization The process is easy to control, prolongs the synthesis reaction cycle, and the effect of accurate component control

Active Publication Date: 2013-02-27
湖南省天心博力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oxygen content of the composite copper powder prepared by this method is relatively high, and the particle size distribution is not easy to adjust accurately and reasonably, which makes the adaptability to different silicon powder particle sizes and different fluidized bed structures poor, and the surface of the particles is not developed enough, and the reactivity is low. , the selectivity of dimethyldichlorosilane is not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A kind of preparation technology of composite copper powder catalyst, described preparation technology method is as follows:

[0036] (1) Preparation of copper shavings: According to the requirements of the cutting machine, cut the electrolytic copper plate with a purity of not less than 99.9% into a copper block with a length of 600mmmm, a width of 50mm, and a thickness of 3mmmm, and then process the copper block with a length of 2mm, a width of 1mm, and a thickness of 0.1 mm shape flat or curled copper shavings. The copper shavings are obtained by cutting, turning, milling, planing and other mechanical processing methods.

[0037] (2) Copper shavings grinding: put the copper shavings obtained in step (1) into a ball mill for grinding in the atmosphere or other protective atmosphere, the medium is a steel ball (steel rod) with a hardness ), the mass ratio of steel balls (steel rods) to copper shavings, the loading amount of the ball mill, the amount of surface treatme...

Embodiment 2

[0046] A kind of preparation technology of composite copper powder catalyst, described preparation technology method is as follows:

[0047] (1) Preparation of copper shavings: According to the requirements of the cutting machine, cut the electrolytic copper plate with a purity of not less than 99.9% into a copper block with a length of 1200mm, a width of 200mm, and a thickness of 20mm, and then process the copper block with a length of 20mm, a width of 10mm, and a thickness of 2mm The shape of flat or curled copper filings. The copper shavings are obtained by cutting, turning, milling, planing and other mechanical processing methods.

[0048] (2) Copper shavings grinding: put the copper shavings obtained in step (1) into a ball mill for grinding in the atmosphere or other protective atmosphere, the medium is a steel ball (steel rod) with a hardness ), the mass ratio of steel balls (steel rods) to copper shavings, the loading amount of the ball mill, the amount of surface tre...

Embodiment 3

[0057] A kind of preparation technology of composite copper powder catalyst, described preparation technology method is as follows:

[0058] (1) Preparation of copper shavings: According to the requirements of the cutting machine, cut the electrolytic copper plate with a purity of not less than 99.9% into a copper block with a length of 900mm, a width of 125mm, and a thickness of 12mm, and then process the copper block with a length of 11mm, a width of 6mm, and a thickness of 1mm The shape of flat or curled copper filings. The copper shavings are obtained by cutting, turning, milling, planing and other mechanical processing methods.

[0059](2) Copper shavings grinding: put the copper shavings obtained in step (1) into a ball mill for grinding in the atmosphere or other protective atmosphere, the medium is a steel ball (steel rod) with a hardness ), the mass ratio of steel balls (steel rods) to copper shavings, the loading amount of the ball mill, the amount of surface treatm...

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Abstract

The invention provides a preparation process of a composite copper powder catalyst, comprising the steps of cutting an electroplating copper plate into a copper block and machining into copper scales; grinding the copper scales into sheet-shaped copper powder; obtaining sheet pure copper powder through a magnetic selection and air flow grading technology; smelting and atomizing a copper-tin-zinc alloy to prepare needed copper-tin-zinc alloy powder; drying and screening, and grinding to obtain scale-shaped copper-tin-zinc alloy powder; magnetically selecting and screening to obtain the needed copper-tin-zinc alloy powder; and mixing the sheet pure copper powder with the copper-tin-zinc alloy powder according to a ratio to obtain the needed composite copper powder catalyst. According to the preparation process of the composite copper powder catalyst, elements which are harmful to an environment are not introduced in a whole process, the quality stability of a product is good, concave-convex defects of the surface of powder grains are more and the specific surface is large; the catalysis property of the composite copper powder catalyst is obviously better than that of common composite copper powder so that the effect of an organic silicon monomer synthesized metal catalyzing system is improved, the time-space yield of an organic silicon monomer synthesized fluidized bed is increased, a synthesis reaction period is prolonged, the selectivity is improved, the cost is reduced and good economic benefits are created.

Description

technical field [0001] The invention relates to the field of catalysts for synthesizing organosilicon monomers, in particular to a preparation process of a composite copper powder catalyst. Background technique [0002] The organosilicon monomer is methylchlorosilane, which is obtained by chemical reaction of metal silicon and methyl chloride in a fluidized bed under the condition of adding catalyst and heating, and its synthesis reaction belongs to gas-solid-solid multiphase contact catalytic release. Thermal reaction, the reaction mechanism is complex, different catalysts can be used to produce different methylchlorosilane products, one of which is the main product, but multiple by-products exist at the same time. Influencing factors in the synthesis reaction process include fluidized bed structure, raw silicon powder, methyl chloride, catalyst, process parameters, etc., especially the type of catalyst and its adaptability play a very important role in the contract reactio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/835
Inventor 张拥军李钢鲁建伟鲁金刚杨从红
Owner 湖南省天心博力科技有限公司
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