Method for carrying out hydrosilylation reaction by using activated carbon fiber immobilized noble metal catalyst

Abstract

The invention relates to a method for applying an activated carbon fiber immobilized rare precious metal catalyst to a hydrosilylation reaction. A heterogeneous catalyst is prepared by immobilizing a homogeneous noble metal catalyst for hydrosilylation on the surface of activated carbon fiber (ACF). The heterogeneous catalyst is fixed in a polytetrafluoroethylene pipeline to serve as a fixed bed reactor for hydrosilylation, and the effect of efficiently catalyzing the hydrosilylation can be achieved. A large number of micropores of the activated carbon fiber (ACF) are directly formed in the surface, no internal diffusion stage exists, and the catalyst has the advantages of being high in immobilization efficiency, good in catalytic selectivity, improved in catalytic activity and the like. In the post-treatment stage, the activated carbon fiber immobilized noble metal catalyst can be conveniently separated from a reaction system and recycled, so that the problem of noble metal loss in the industrial production process is effectively solved, and meanwhile, the quality of an organic silicon product is improved.

Description

technical field [0001] The invention belongs to the field of modified synthesis of supported catalysts. Specifically, it relates to a preparation method of rare precious metal catalysts such as platinum supported on activated carbon fibers, its use in hydrosilylation reaction, and the corresponding method of hydrosilylation reaction. Background technique [0002] The hydrosilylation reaction is an important reaction in the preparation of carbon functional groups and silicone polymers in the field of organosilicon. It is based on the addition reaction of Si-H and unsaturated functional groups under the catalysis of platinum-based rare metal compounds. Rare and precious metal catalysts such as platinum have mainly experienced four development stages: transition metal catalysts, homogeneous catalysts, zero-valent catalysts, and solid-supported catalysts. The catalysts in the first three stages all have the disadvantages that it is difficult to separate and recover precious met...

AI Technical Summary

Problems solved by technology

However, the immobilized catalyst prepared by the above method has the disadvantages of low immobilization efficiency, cumbersome filtration and other additional operations.

Images