摘要
制备了氯铂酸-异丙醇、氯铂酸-聚甲基乙烯基硅氧烷和氯铂酸-三苯基膦三种催化剂,评价了它们在乙炔与三乙氧基硅烷的硅氢加成反应中的催化活性及选择性;并考察了反应温度、乙炔流量、氯铂酸-聚甲基乙烯基硅氧烷与三乙氧基硅烷摩尔比、PPh3/H2PtCl6摩尔比等因素对产物收率的影响.结果表明,氯铂酸-聚甲基乙烯基硅氧烷对该反应表现出较高的催化活性,在催化剂与三乙氧基硅烷摩尔比为1.2×10-4∶1,T=80℃,乙炔流量=120 mL/min的条件下反应,产物乙烯基三乙氧基硅烷的选择性为100%,收率可达97.5%.
Three kinds of catalysts, which are platinum-isopropyl alcohol, platinum-polymethylvinylsiloxane and platinum-triphenyl phosphine were prepared. The acticity and selectivity of these catalysts for the hydrosilation of acetylene with triethoxysilane were measured. The influence of reaction conditions, such as reaction temperature, flow rate of acetylene, molar ratio of platinum-polymethylvinylsiloxane and triethoxysilane, PPh3/H2PtCl6 molar ratio et al, was investigated. The result indicates that the platinum-polymethylvinylsiloxane showed high catalytic activity in the hydrosilation. Under the optimum conditions of catalyst/triethoxysilane = 1.2 × 10^-4/1 （mol/mol）, T = 80 ℃, C2H2 flow rate = 120 mL/min, the selectivity for the vinyltriethoxysilane was 100% and the yield reached 97.5%.
出处
《分子催化》
EI
CAS
CSCD
北大核心
2007年第5期442-446,共5页
Journal of Molecular Catalysis(China)
关键词
乙炔
三乙氧基硅烷
硅氢加成
铂催化剂
Acetylene
Triethoxysilane
Hydrosilylation
Platinum catalyst
