稀土改性固体超强酸催化剂SO_4^(2-)/TiO_2-La_2O_3催化合成环己酮乙二醇缩酮  

Catalytic Synthesis of Cyclohexanone Ethylene Ketal by Rare Earth Solid Superacid SO_4^(2-)/TiO_2-La_2O_3

作　　者：杨水金[1] 吴宇[1] 孙聚堂[2] 

机构地区：[1]湖北师范学院化学与环境工程系,湖北黄石435002 [2]武汉大学化学与分子科学学院,湖北武汉430072

出　　处：《化学反应工程与工艺》2003年第4期311-316,共6页Chemical Reaction Engineering and Technology

基　　金：湖北省教育厅重点科研基金(№.2002A00008)资助项目

摘　　要：　制备了稀土改性固体超强酸催化剂SO42-/TiO2-La2O3,并利用该催化剂催化合成了环己酮乙二醇缩酮,探讨了SO42-/TiO2-La2O3对缩酮反应的催化活性,较系统地研究了酮醇物质的摩尔比,催化剂用量,反应时间诸因素对产品收率的影响。实验表明:SO42-/TiO2-La2O3是合成环己酮乙二醇缩酮的良好催化剂,在n(酮)∶n(醇)=1∶1.5,催化剂用量为反应物料总质量的0.5%,环己烷为带水剂,反应时间1.5h的优化条件下,环己酮乙二醇缩酮的收率可达84.3%。The catalystic rare earth solid superacid SO_4^(2-)/TiO_2-La_2O_3 was prepared. Cyclohexanone ethylene ketal was synthesized from cyclohexanone and ethylene glycol in the presence of rare earth solid superacid SO_4^(2-)/TiO_2-La_2O_3. The factors influencing the synthetic processes were discussed and the best conditions were found out. The optimum conditions are: molar ratio of cyclohexanone to ethylene glycol is 1∶1.5, the quantity of catalyst is equal to 0.5% feed stock, the reaction temperature is 90～120 oC, and the reaction time is 1.5 h. It was found that the yield can reach over 84.3%. Rare earth solid superacid SO_4^(2-)/TiO_2-La_2O_3 might be a good kind of catalysts for synthesizing cyclohexanone ethylene ketal.

关 键 词：稀土改性固体超强酸 催化剂 SO4^2-/TIO2-LA2O3 催化合成 环己酮乙二醇缩酮 

分 类 号：TQ234.21[化学工程—有机化工]