Methylchlorosilane was synthesized by silicon powder and methyl chloride in a straight-tube fixed stirred bed reac-tor.The performance of three composite copper catalysts was evaluated by calculating the selectivity and silicon conversion rate of dimethyl dichlorosilane(M2).The results show that the catalytic performance of self-produced powder C is relatively good.The average selectivity of M2 with powder C is 91.89％in the reaction,and the silicon conversion rate is 59.24％.Powder C is thin-ner and finer,it also has higher specific surface area,and lower density and finer particle size,which is beneficial to form more active centers with silicon powder in the synthesis of methylchlorosilane.
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