Copper Catalyst Preparation And Catalytic Synthesis Of Dimethyl Dichlorosilane Research

Organic chlorosilanes is the most important raw material for the preparation of silicone polymer (silicone oil, silicone rubber and silicone) and other silicon-functional silane. Many organic silicon monomers were used in preparing the polysiloxane. The methylchlorosilanes are more than90wt%. Among them, the amount of dimethyldichlorosilane is about80wt%. Silicone catalyst as the core material of the organic synthesis of silicon technology subject to the attention of academia and industry, so studying its catalytic performance is a very important issue.The solvothermal methods successful prepared the different structures of porous copper, mesoporous cuprous oxide and flower-like copper oxide. The samples composition and structure were characterized by scanning electron microscopy, energy dispersive spectroscopy, transmission electron microscopy, X-ray diffraction, specific surface area analyzer, temperature programmed reduction and thermal gravimetricanalysis. The porous copper, mesoporous cuprous oxide and flower-like copper oxide were used as catalysts for the synthesis of dimethyldichlorosilanes. We also studied the catalytic effect of the commercial catalysts and commercial copper oxide (copper, cuprous oxide and copper oxide) to compare with our catalysts.The catalytic evaluation results show that the dimethyldichlorosilane selectivity and the silicon conversion of porous copper were better than commercial copper powder. The mesoporous cuprous oxide catalytic was better than the solid of cuprous oxide. The flower-like copper oxide was better than commercial catalysts and commercial copper oxide. They shows a better catalytic performance on dimethyldichlorosilane synthesis via Rochow reaction, owing to their developed hierarchical structure and higher surface area, which lead to the more contact interface among reaction gas, solid catalyst, and solid reactant, together with enhanced mass transportation.The work studied the formation mechanism of porous copper, mesoporous cuprous oxide and flower-like copper oxide. This work would be helpful for developing novel structured copper catalysts for organosilane synthesis and understanding the catalytic mechanism.