A kind of production method of γ-chloropropyl trichlorosilane

Abstract

The invention discloses a production method of gamma-chloropropyl trichlorosilane, belonging to the technical field of silicon chemical industry. The production method is characterized by comprising the following preparation steps: proportioning trichlorosilane and chloropropene, and then injecting into a measuring tank for standby application; adding a chloroplatinic acid catalyst, a side reaction inhibitor and silicon tetrachloride into a reaction still; adding the whole chloropropene into the reaction still, and then starting to dropwise add the trichlorosilane, wherein when the temperature of the reaction still is gradually increased to 57 DEG C along with the process of a reaction, silicon tetrachloride starts to get condensate and flows back, and the whole trichlorosilane is dropwise added within 4h-9h; after the whole trichlorosilane is dropwise added, increasing the temperature to 80-90 DEG C, keeping the temperature for 1-2.5h, and separating a product to obtain the gamma-chloropropyl trichlorosilane. According to the production method, the reaction can be performed at a low temperature or normal temperature, an induction period is not needed, the reaction time is short, and the catalyst is not easy to inactivate and is small in use amount.

Description

technical field [0001] A production method of γ-chloropropyltrichlorosilane belongs to the technical field of silicon chemical industry. Background technique [0002] The existing production process of γ-chloropropyltrichlorosilane basically utilizes Speier catalyst to catalyze chloropropene and hydrogen-containing chlorosilane to carry out silicon hydrogen reaction, and the existing problems can be summarized as follows: [0003] 1) The Speier catalyst catalyzes the hydrosilylation reaction of chloropropene and hydrochlorosilane with a long induction period, and the reaction temperature needs to reach 80°C~100°C to start the reaction. The reaction time is long, the catalyst is easy to deactivate, and the amount of catalyst is large. In addition, HCL and FeCL 3 Impurities such as inhibit the catalytic hydrosilylation reaction; [0004] 2) The Speier catalyst catalyzes the hydrosilation reaction of chloropropene and hydrogen-containing chlorosilane with poor selectivity. In...

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Problems solved by technology

[0004] 2) The Speier catalyst catalyzes the hydrosilation reaction of chloropropene and hydrogen-containing chlorosilane with poor selectivity. In addition to the main reaction of 3-chloropropyltrichlorosilane, there is also a side reaction of silicon hydrogen compound reduction of chloropropene to obtain the by-product propylene and silicon tetrachloride;

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