二氧化钛负载磷钨杂多酸催化合成丁酮乙二醇缩酮  

Catalytic synthesis of butanone glycol ketal with H_3PW_(12)O_(40)/TiO_2

作　　者：杨水金[1] 李臻[1] 吕宝兰[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：《化学工业与工程技术》2007年第2期1-3,共3页Journal of Chemical Industry & Engineering

基　　金：湖北省自然科学基金(2005ABA053);湖北省教育厅教学研究资助项目(20060335)

摘　　要：以二氧化钛负载磷钨杂多酸H_3PW_(12)O_(40)/TiO_2为多相催化剂,以丁酮和乙二醇为原料,合成了丁酮乙二醇缩酮。探讨了H_3PW_(12)O_(40)/TiO_2对缩酮反应的催化活性。研究了酮醇物质的量比、催化剂用量、反应时间诸因素对产品收率的影响。实验表明,H_3PW_(12)O_(40)/TiO_2是合成丁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1．6%(亦即质量分数),环己烷为带水剂,反应时间1．0 h的最佳条件下,丁酮乙二醇缩酮的收率可达60．3%。The butanone glycol ketal is synthesized from butanone and ethylene glycol in the presence of H3PW12O40/TiO2. The factors influencing the synthesis such as the molar ratio of butanone to ethylene glycol, the mass fraction of catalyst, the reaction temperature and the reaction time are discussed. The experiment shows that H3 PW12O40/TiO2 is an excellent catalyst for synthesis butanone glycol ketal. The optimum conditions are： the molar ratio of butanone to ethylene glycol is 1 ： 1.5, the mass fraction of catalyst is 1.6%, the reaction temperature is 76-99 ℃, the reaction time is 1.0 h, and the water is removed with hexamethylene. The yield of butanone glycol ketal can reach over 60.3 % at the optimum conditions.

关 键 词：丁酮乙二醇缩酮 磷钨酸 催化 缩酮反应 

分 类 号：O623.52[理学—有机化学] O643.32[理学—化学]