摘要
以ＣＨ３ＳｉＨＣｌ２和ＣＨ３ＯＨ为原料，采用三种不同的醇解方法（溶剂法、酸吸收剂法、气－液相法）合成甲基二甲氧基硅烷［ＣＨ３（ＯＣＨ３）２ＳｉＨ］，运用ＩＲ、ＧＣ－ＭＳ等手段研究了三种方法对醇解反应的影响。结果表明，溶剂法可避免另两种方法的一些缺陷，产物含量较高。其最佳合成条件为：用二甲苯作溶剂，ＣＨ３ＳｉＨＣｌ２和ＣＨ３ＯＨ的摩尔比为１∶１８，ＣＨ３ＯＨ以一定速度滴入ＣＨ３ＳｉＨＣｌ２溶液中，控制反应温度在３０℃左右，反应时间６ｈ，其ＣＨ３（ＯＣＨ３）２ＳｉＨ含量可达８０％。
ethyldimethoxysilane was synthesized with CH_3SiHCl_2 and CH_3OH by alcoholysis methods(solution,acid acceptor and gas-liquid phase).The effects on the alcoholysis in different conditions were studied by IR and GC-MS.The results showed that solution method could avoid a few defects than others.The perfect conditions for synthesizing methyldimethoxysilane were:xylene used as solution,the molar ratio of CH_3SiHCl_2 and CH_3OH being 1∶18,reactive temperature 30℃,reactive time 6 h.The CH_3(OCH_3)_2SiH content of product was 80%.
