磷钨酸/硅胶催化剂催化合成丁酮1,2-丙二醇缩酮  

Catalytic Synthesis of Butanone 1,2-Propanediol Ketal over Phosphotungstic Acid/Silica

作　　者：白爱民[1] 吴君[1] 杨水金[1] 

机构地区：[1]湖北师范学院化学与环境工程学院,黄石435002

出　　处：《精细石油化工进展》2008年第11期18-20,共3页Advances in Fine Petrochemicals

基　　金：湖北省教育厅教研基金(20060335)资助项目

摘　　要：以溶胶-凝胶法制备磷钨酸/硅胶催化剂,通过丁酮和1,2-丙二醇反应合成丁酮1,2-丙二醇缩酮,探讨了磷钨酸/硅胶对缩酮反应的催化活性,较系统地研究了酮醇摩尔比、催化剂用量、反应时间和带水剂用量诸因素对产品收率的影响。实验表明,磷钨酸/硅胶是合成丁酮1,2-丙二醇缩酮的良好催化剂,在 n(酮):n(醇)=1:1.4,催化剂用量为反应物料总质量的0.75%,环己烷为带水剂,反应时间60 min 的优化条件下,丁酮1,2-丙二醇缩酮的收率可达80.0%。Butanone 1,2 -propanediol ketal was synthesized from butanone and 1,2 -propanediol in the presence of phosphotungstic acid/silica prepared by sol - gel method. The factors influencing the synthesis were discussed and the best conditions were found out. The optimum conditions were as follows：molar ratio of butanone to 1,2 -propanediol 1： 1.4,the quantity of catalyst equal to 0.75% of feed stocks,the dewatering reagent cyclohexane 10 mL,and the reaction time 60 min. Phosphotungstic acid/silica was an excellent catalyst for synthesizing butanone 1,2 - propanediol ketal and its yield could reach over 80.0%.

关 键 词：丁酮1 2-丙二醇缩酮 磷钨酸/硅胶 催化 缩酮反应 

分 类 号：TQ224[化学工程—有机化工]