二氧化钛负载磷钨杂多酸催化合成1,2-丙二醇缩丁酮  

Catalytic Synthesis of Butanone 1,2-Propanediol Ketal by 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：《稀有金属》2006年第5期707-710,共4页Chinese Journal of Rare Metals

基　　金：湖北省自然科学基金(2005ABA053)资助项目

摘　　要：以二氧化钛负载磷钨杂多酸H3PW12O40/TiO2为催化剂,丁酮和1,2-丙二醇为原料合成了1,2-丙二醇缩丁酮,考查了H3PW12O40/TiO2对缩酮反应的催化活性,研究了酮醇摩尔比、催化剂用量、反应时间诸因素对产品收率的影响。实验表明:H3PW12O40/TiO2是合成1,2-丙二醇缩丁酮的良好催化剂,在丁酮与1,2-丙二醇的摩尔比为1∶1.5,催化剂用量为反应物料总质量的1.25%,环己烷为带水剂,反应时间1.0 h的优化条件下,1,2-丙二醇缩丁酮的收率可达78.7%。Butanone 1, 2-propanediol ketal was synthesized from butanone and 1,2-propanediol in the presence of HaPW12040/TiO2. The factors influencing the synthetic reaction were studied and the best conditions were found out. The optimum conditions are. molar ratio of butanone to 1,2-propanediol is 1 ： 1.5, the quantity of catalyst is equal to 1.25% feed stock, the reaction temperature is 78 - 108℃, and the reaction time is 1.0 h. H3PW12O40/TiO2 is an excellent catalyst for synthesizing butanone 1,2-propanediol ketal and its yield can reach 78.7%.

关 键 词：1 2-丙二醇缩丁酮 磷钨酸 催化 缩酮反应 

分 类 号：TQ426.91[化学工程] TQ655