Preparation method and application of black phosphorus treated copper-based catalyst

A copper-based catalyst, catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, organic chemistry, etc., can solve the problems of difficult to balance selective conversion rate, low catalytic activity, etc., and achieve excellent safety and treatment methods. Simple, inherently stable effects

Active Publication Date: 2021-06-04
深圳市中科墨磷科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, aiming at the problem that the catalytic activity of the current metal copper powder catalytic system is not high, and the selective conversion rate is difficult to balance, the present invention aims to provide a black phosphorus-treated copper-based catalyst and its preparation method and application. The base catalyst has higher M2 selectivity and can synthesize dimethyldichlorosilane more efficiently

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  • Preparation method and application of black phosphorus treated copper-based catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take 80g of the fresh copper powder catalyst in the comparison example, add 50mL of black phosphorus dispersion liquid that has been uniformly dispersed by ultrasound by soaking, reflux at 70°C for 10h, then centrifuge, separate and rinse with a mixture of ethanol and water several times. Dry at 50° C. for 12 hours, dry and grind to obtain the copper-based catalyst treated with black phosphorus. Among them, the mass ratio of black phosphorus to copper powder catalyst is 0.01:100.

[0028] The catalyst obtained in Example 1 was used for the direct synthesis of methylchlorosilane. The specific operation is to take 80g of the catalyst, mix it with silicon powder, and put it into a fluidized bed device. The temperature of the sand bath fluidized bed is 350°C, the flow rate of methyl chloride gas is 30mL / min, and the reaction time is 100h.

Embodiment 2

[0030] A copper-based catalyst treated with black phosphorus was prepared with reference to Example 1, the difference being that the mass ratio of black phosphorus to copper powder catalyst was 0.1:100.

[0031] The catalyst obtained in Example 2 was used for the direct synthesis of methylchlorosilane according to the method described in Example 1, and the specific operation method was the same as that of Example 1.

Embodiment 3

[0033] A copper-based catalyst treated with black phosphorus was prepared with reference to Example 1, the difference being that the mass ratio of black phosphorus to copper powder catalyst was 1:100.

[0034]The catalyst obtained in Example 3 was used for the direct synthesis of methylchlorosilane according to the method described in Example 1, and the specific operation method was the same as that of Example 1.

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Abstract

The invention discloses a preparation method of a black phosphorus treated copper-based catalyst and application of the black phosphorus treated copper-based catalyst in a reaction for synthesizing methyl chlorosilane by a direct method. According to the invention, a black phosphorus precursor is added into a copper-based catalyst, and a new species phosphide is introduced through the phosphating effect of black phosphorus on the surface of a copper species. The activity test result shows that the formation of the species can effectively improve the selectivity and yield of the target product dimethyl dichlorosilane. The treatment mode is simple to operate, wastewater difficult to treat is not generated in the preparation process, the method is very suitable for large-scale preparation of industrial catalysts, and good economic benefits can be generated. In addition, the black phosphorus crystal is stable, is not prone to spontaneous combustion, is suitable for large-scale industrial application, and can greatly improve the safety of enterprise production.

Description

technical field [0001] The invention belongs to the technical field of black phosphorus materials, and in particular relates to a method for preparing a copper-based catalyst treated with black phosphorus and its application in the direct synthesis reaction of methylchlorosilane (namely the Rochow reaction). Background technique [0002] Organosilicon compound is a polymer with dual properties of inorganic and organic materials, widely used in aerospace, construction materials, coatings, electronics industry, textile industry and medical and health products. The basis of organic silicon industry production is the synthesis of methyl silane monomer, its production efficiency and technical level are important indicators of the development level of organic silicon industry. At present, the industrial synthesis of methylsilane mainly adopts the direct method, that is, the direct synthesis of solid silicon powder and gaseous methyl chloride in one step (commonly known as Rochow r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/14C07F7/16
CPCB01J27/14C07F7/16
Inventor 喻学锋白力诚高山王欣
Owner 深圳市中科墨磷科技有限公司
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