有机硅单体生产中副产物的转化和利用

近年来，随着国内经济的不断发展，许多新型材料应运而生．有机硅材料因其优异的性能和独特的功能得到了普遍关注，有机硅工业因而迅速发展成为技术密集、在国民经济中占有一定地位的新型化工体系．

CONVERSION AND UTILIZATION OF BYPRODUCTS IN DIRECT SYNTHESIS OF METHYLCHLOROSILANES

The direct synthesis of methylchlorosilanes by reacting metallic silicon with methyl chloride in the presence of a copper catalyst yields low-boiling component,high-boiling component and methyltrichlorosilane as by-products. The proposed process for prepares monosilanes from the HBC fraction by reacting it with hydrogen chloride in the presence of an amine or amide catalyst. The conversion of disilanes into monosilanes is above 80% in general and the best is 86%.A method is also proposed for preparing dimethyldichlorosilane from methyltrichlorosilane,reacting simultaneously with the LBC components having a high content of methyl groups and with the HBC non-cleavable components,in the presence of a catalyst,in which the best conversion is 66.2%,and the best content of dimethyldichlorosilane in final products is 46.4%.