Novel vinyl trichlorosilane catalyst, preparation method thereof and method for preparing vinyl trichlorosilane through catalysis of novel vinyl trichlorosilane catalyst

Abstract

The invention discloses a novel vinyltrichlorosilane catalyst, a preparation method thereof and a method for preparing vinyltrichlorosilane through catalysis of the novel vinyltrichlorosilane catalyst. The preparation method of the catalyst comprises the following steps: 1) grafting amino to a porous carrier through an organic amine compound to obtain an amino-modified porous carrier; and 2) dispersing the amino-modified porous carrier in water to obtain a first mixture, adding a chloroplatinic acid aqueous solution into the first mixture, mixing to obtain a second mixture, and drying the second mixture to obtain the novel vinyl trichlorosilane catalyst which is the amino-modified porous carrier loaded with chloroplatinic acid. According to the preparation method of the catalyst, chloroplatinic acid is loaded on the amino-modified porous carrier so that the active component chloroplatinic acid is uniformly distributed on the surface of the porous carrier, and the product and the catalyst are separated through a filtering technology after a catalytic reaction in a catalytic method, and thus the aims of recycling the catalyst and reducing the production cost are fulfilled.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a novel vinyltrichlorosilane catalyst, a preparation method thereof, and a method for catalytically preparing vinyltrichlorosilane. Background technique [0002] The general formula of silane coupling agent is: Y(CH 2 ) nSiX 3 [n=0-3; X is a hydrolyzable group; Y is an organic functional group]. According to the different organic functional groups, silane coupling agents can be divided into amines, vinyls, epoxies, acrylates, mercaptos, ureas, etc. Among them, vinyl silane coupling agent is one of the silane products with wide application and large dosage. There are two main routes for the preparation of vinyl trichlorosilane, one is thermal shrinkage and reaction of trichlorosilane and vinyl chloride; the other is hydrosilylation of acetylene and trichlorosilane reaction. Wherein, the optimal reaction condition of first kind of method reaction is: 550 ℃ of rea...

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Problems solved by technology

Wherein, the optimal reaction condition of first kind of method reaction is: 550 ℃ of reaction temperature, pressure 303kPa, the yield of vinyl trichlorosilane is higher, and by-product is silicon tetrachloride, but this method energy consumption is higher, increases The production cost is reduced; the second method uses chloroplatinic acid as a catalyst, and acetylene and trichlorosilane undergo hydrosilylation reaction at a reaction temperature of 80-100°C and a pressure of 20-100kPa. At present, the most used method in China is acetylene and trichlorosilane. Chlorohydrosilane reaction, which will produce high boilers and entrain chloroplatinic acid catalysts during the reaction process, resulting in catalysts that cannot be recycled, resulting in waste and increased production costs

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