固体超强酸SO_4^(2-)/ZrO_2-A1_2O_3催化反应合成二甲基硅油  

Synthesis of Polydimethylsiloxane with Solid Super Acid SO_4^(2-)/ZrO_2-A1_2O_3 as Catalyst

作　　者：赵倩 

机构地区：[1]河南化学工业高级技工学校化工系,河南开封475002

出　　处：《广东化工》2008年第12期45-47,116,共4页Guangdong Chemical Industry

摘　　要：制备了适于二甲基硅油合成的固体酸催化剂SO42-/ZrO2-A12O3,开发了以固体超强酸SO42-/ZrO2-A12O3为催化剂,以八甲基环四硅氧烷和六甲基二硅氧烷为原料合成二甲基硅油的新工艺。考察了催化剂用量、反应温度、反应时间和脱低沸时间等因素对产品粘度和闪点的影响。实验结果表明:在固定原料配比n(八甲基环四硅氧烷)︰n(六甲基二硅氧烷)=36︰1下,二甲基硅油合成的较佳工艺条件为:催化剂的用量为反应物总质量的2%,反应温度为120℃,反应时间为3 h,脱低沸物时间为3 h。Polydimethylsiloxane was synthesized using solid super acid SO42-/ZrO2-Al2O3 as catalyst with octamethylcyclotetrasiloxane and hexamethyldisiloxane as raw materials. The influence of catalyst dosage, reaction time, reaction temperature and the time of taking of the low weight molecular compound on viscosity and flashing point were studied. Experiment results showed that the optimum reaction conditions were as follows ： with （octamethylcyclotetrasnoxane） ： （hexamethyldisiloxane）=36 ： 1, catalyst dosage was 2 % the weight of the total reactants, reaction temperature was 120 ℃, reaction time was 3 h, the time of taking of the low weight molecular compound was 3 h.

关 键 词：固体超强酸 二甲基硅油 粘度 

分 类 号：TQ655[化学工程—精细化工] TQ423.95