Copper catalyst for direct method synthesis of methylchlorosilane and preparation method thereof

Abstract

The invention relates to a preparation method of a ternary copper powder catalyst for synthesis of methylchlorosilane. The method is as follows: preparing a porous CuO metal micro-cluster body with a multilevel dandelion structure by a hydrothermal method, reducing the CuO with H2 to completely obtain a Cu metal micro-cluster body, and partially oxidizing to obtain a Cu2O and Cu mixture metal micro-cluster body; and finally, mixing the CuO metal micro-cluster body, the Cu metal micro-cluster body and the Cu2O and Cu mixture metal micro-cluster body in ratio to obtain the ternary copper powder catalyst. The ternary copper powder catalyst prepared by the method has a specific surface area up to 10-60m<2> / g, and has a hierarchical porous structure, in the reaction process of direct synthesis of the methylchlorosilane, contact interface between a reaction gas and solid silica fume can be increased, the catalytic activity of the catalyst can be improved, especially the three component ratio can be accurately controlled, by collocation of a little of a cocatalyst promoter, the selectivity of dimethyldichlorosilance in the product can reach a high level.

Description

technical field [0001] The invention relates to a preparation method of a ternary copper catalyst used for synthesizing methylchlorosilane, belonging to the technical field of catalysts. Background technique [0002] Organochlorosilanes (methyl chlorosilane, phenyl chlorosilane, vinyl chlorosilane, etc.) are the basis of the entire organosilicon industry, among which, methyl chlorosilane is the backbone of the organosilicon industry. The most important monomer and the basic raw material for the preparation of other silicon-functional silanes. Most silicone polymers are based on polydimethylsiloxane prepared from dimethyldichlorosilane (hereinafter referred to as dimethyl) as the base polymer, and then introduce other groups such as phenyl, vinyl, chlorine Phenyl, cyanoalkyl, fluoroalkyl, etc., to meet special needs. [0003] In 1941, E.G. Rochow first proposed the direct synthesis of methylchlorosilane by reacting methyl chloride and silicon powder under the action of a co...

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Problems solved by technology

[0012] In view of the use of the above three types of catalysts in production, as well as the current low catalytic activity of the ternary copper catalyst and the lack of catalyst preparation methods, the present invention provides a ternary copper catalyst system for the synthesis of methylchlorosilane. The preparation method, each component of the catalyst prepared by this method can be precisely controlled, has a higher specific surface area, and has higher reactivity and dimethyl selectivity for the direct production of dimethyldichlorosilane, greatly reducing the production cost

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