甲基氯硅烷单体合成反应中CuCl催化剂改性研究

针对甲基氯硅烷单体直接合成反应,提出了一种采用甲基三氯硅烷(M1)对CuC l催化剂改性的新方法。由湿法制备的CuC l催化剂表面具有大量的羟基,通过M1改性后,采用红外光谱表征,其表面羟基大幅度减少。采用反应热重的实验方法对CuC l和硅粉共同形成活性中心的反应进行了评价,结果表明改性后的催化剂能够降低形成活性中心的引发温度,为评价单体合成反应找到了一种更为简便的方法。甲基氯硅烷合成反应评价装置上的催化反应结果表明,使用改性后的CuC l催化剂,反应活性提高了大约50%,选择性大约提高了3%,同时S i粉的最大转化率也有很大提高。

Modification of CuCl catalyst used in the direct synthesis reaction of methyl chlorosilane monomer

A new method to modify the CuCl catalyst,used in the direct synthesis reaction of methylchlorosilane monomer,with methyltrichlorosilane(M_1),was proposed.The CuCl catalyst was prepared by wet-deposited method and on its surface bore much hydroxyl.The hydroxyl decreased largely,determined by IR technique,after the M_1 modification.Reaction-TG method was introduced to evaluate the reaction between CuCl and silicon particles to form the catalytic centers,and the results show that the modified catalyst can reduce the induced temperature for forming the catalytic centers.A more convenient way to evaluate the monomer synthesis reaction was also found.The experimental results obtained from the evaluated reactor of methylchrolosilane synthesis show that the modified CuCl catalyst can markedly enhance the reaction rate,selectivity and silicon conversion.