Method for preparing gamma-chloropropyl trichlorosilane by multicomponent compound catalysis

Abstract

The invention discloses a method for preparing gamma-chloropropyl trichlorosilane by multicomponent compound catalysis, which adopts trichlorosilane and chloropropene as main raw materials to synthesize the gamma-chloropropyl trichlorosilane; besides chloroplatinic acid is taken as main catalyst, the reaction system is also added with alicyclic amine and phenylene diamines compound which are taken as cocatalyst, triisopropanolamine and 2, 4-pentandione that are taken as activator, as well as resorcinol and diethyl hydroxylamine that are used as inhibitor; after hydrosilylation, the finished product is obtained by distillation and rectification. The method can greatly increase the content of the produced product, improve the appearance of the product, reduce impurities of the product, improve the quality of the product and lower the production cost.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, in particular to a method for preparing a silane coupling agent. Background technique [0002] Silane coupling agent is the fourth major category after the three major products in the silicone industry - silicone oil, silicone rubber, and silicone resin. Its position in the silicone industry is becoming increasingly important and has become a modern silicone industry. It is an indispensable supporting chemical additive in molecular industry, composite material industry and related high-tech fields, and it is an important high-tech content and high value-added silicone product. [0003] Coupling agent is a kind of substance with two different functional groups. Part of the functional groups in their molecules can react with organic molecules, and the other part of the functional groups can react with the adsorbed water on the surface of inorganic substances to form a strong bond. The role of the...

AI Technical Summary

Problems solved by technology

And the present existing technique main productive rate is all lower than 85%; And has following deficiency: (1) production cycle is long; (2) raw material (calculated as trichlorosilane) conversion rate is low, and product yield is low; (3) ) many side reactions, the finished product γ-chloropropyl trichlorosilane has low content and high impurity content

[0006] 1. Product content problem The content of products prepared by the existing production process is generally lower than 99%. In many special use occasions, due to the different use environments and conditions, customers hope that the content is at least higher than 99%. The downstream of some special purposes Product users require that the content of γ-chloropropyltrichlorosilane be greater than 99.5%;

[0007] 2. Product appearance problems Most of the existing products are light yellow or slightly yellow liquid, some manufacturers' products are brown or brownish yellow, and some products have fine suspended matter or sediment, which directly affects the use of the product;

[0008] 3. The problem of product impurities. Some special-purpose products, such as catalyst carriers or catalysts, are synthesized from γ-chloropropyltrichlorosilane. The quality indicators such as the structure and content of impurities are extremely strict. Serious consequences such as poisoning, deactivation or even unusability of the synthesized catalyst will cause losses to scientific research and production;

[0009] 4. Product yield problem The current yield of γ-chloropropyltrichlorosilane is only about 80%. If the yield can be improved by adjusting the production process, the economic and social benefits of the product will be quite objective;