硅钨杂多酸催化合成缩醛(酮)  

Catalytic Synthesis of Acetals(Ketals) with Heteropoly Silicotungstic Acid

作　　者：杨水金[1] 夏佳[1] 刘江燕[1] 韩德艳[1] 

机构地区：[1]湖北师范学院化学与环境工程系,湖北黄石435002

出　　处：《精细与专用化学品》2004年第14期15-18,共4页Fine and Specialty Chemicals

基　　金：湖北师范学院优秀中青年科技创新团队基金 (2 0 0 3CX0 8);无机化学重点学科基金资助项目

摘　　要：以硅钨酸为催化剂 ,以乙酰乙酸乙酯、环己酮、丁酮、苯甲醛和正丁醛与二元醇 (乙二醇 ,1 ,2 丙二醇 )为原料合成了 1 0种缩醛 (酮 )。较系统地研究了醛 /酮与二元醇量比、催化剂用量、反应时间诸因素对收率的影响。结果表明 ,在n(醛 /酮 )与n(乙二醇 / 1 ,2 丙二醇 ) =1∶2 0 ,催化剂的用量占反应物料总质量的 1 0 %,反应时间为 1h条件下 ,1 0种缩醛 (酮 )的产率在 5 2 3%～ 80 0Based on ethyl acetoacetate, cyclohexanone, butanone, phenylaldehyde, n butanal and dihydroxy alcohol(such as ethanediol, 1,2 propanediol) 10 kinds of acetals(ketals) are synthesized with silicotungstic acid as catalyst. Various factors concerned in these reactions have been investigated. The optimum conditions have been found, that is, the molar ratio of aldehyde / ketone to glycol is 1∶2 0, the mass ratio of the catalyst used to the reactants is 1 0%, and the reaction time is 1 0 h. Under these conditions, the yields of 10 kinds of acetals (ketals) are in the range between 52 3% and 80 0%.

关 键 词：硅钨杂多酸 催化合成 缩醛 缩酮 香料 乙二醇 1 2-丙二醇 

分 类 号：TQ223[化学工程—有机化工]