磷钨酸/硅胶催化剂催化合成环己酮1,2-丙二醇缩酮  

Catalytic Synthesis of Cyclohexanone 1,2-Propylene ketal over Phosphotungstic acid /silica

作　　者：杨才峰[1] 张义军[1] 杨水金[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：《化工中间体》2007年第10期7-8,29,共3页

基　　金：湖北省教育厅教研基金(20060335)资助项目

摘　　要：以溶胶-凝胶法制备的磷钨酸/硅胶为催化剂、通过环己酮和1,2-丙二醇反应合成了环己酮1,2-丙二醇缩酮,探讨磷钨酸/硅胶对缩酮反应的催化活性,较系统地研究了酮醇量比、催化剂用量、反应时间、带水剂用量对产品收率的影响。实验表明:磷钨酸/硅胶是合成环己酮1,2-丙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45min的优化条件下,环己酮1,2-丙二醇缩酮的收率可达79.8%.Cyclohexanone 1,2-propylene ketal was synthesis from cyclohexanone and 1,2-propylene glycol 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 are： molar ratio of cyclohexanone to 1,2-propylene glycol is 1：1.5, the quantity of catalyst is equal to 0.5% of feed stocks, dried cyclohexane 8 mL, and the reaction time 45 min. Phosphotungstic acid / silica is an excellent catalyst for synthesizing cyclohexanone 1,2-propylene ketal and its yield can reach over 79.8%.

关 键 词：环己酮1 2-丙二醇缩酮 磷钨酸/硅胶 催化 缩酮反应 

分 类 号：TQ655[化学工程—精细化工]