磺酸化离子液体负载杂多酸盐催化合成乙酸环己酯  

Catalytic Synthesis of Cyclohexyl Acetate Using Sulfonated Organic Heteropolyacid Salts as Catalysts

作　　者：张晓芳[1] 严巍[1] 况盈楹 陈可可[1] 韩晓祥[1] 励建荣[2] 

机构地区：[1]浙江工商大学应用化学系,杭州310018 [2]渤海大学辽宁省食品安全重点实验室,辽宁锦州121013

出　　处：《中国食品学报》2016年第8期125-131,共7页Journal of Chinese Institute Of Food Science and Technology

摘　　要：以乙酸和环己醇为原料,吡啶功能化离子液体负载磷钨酸为催化剂,考察醇酸物质的量比、催化剂用量、反应时间、带水剂用量等因素对乙酸环己酯收率的影响,并通过响应面分析法优化反应工艺。研究表明:[PPSH]2.0HPW12O40催化剂具有最好催化活性,优化后最佳反应条件为:醇酸物质的量比为1.6∶1,催化剂用量为乙酸质量的6%,反应时间2.1 h,带水剂用量10 m L,此条件下乙酸环己酯的收率达92.1%,与回归模型预测结果相当。催化剂回收并重复使用6次,催化活性无明显降低,表明其具有良好的重复使用性。Cyclohexyl acetate was synthesized from cyclohexanol and acetic acid with SO3H- functionalized acidic ionic liquids supported phosphotungstic acid as catalysts. The effects of alcohol/acid molar ratio, the amount of catalyst,reaction time and the amount of water-carrying agent were also investigated. Meanwhile, the optimum operation conditions were obtained by response surface methodology（RSM）. Results showed： [PPSH]2.0HPW12O40 catalyst had the best catalytic activity on the esterification of cyclohexanol with acetic acid. The optimum conditions were as follows ： n（cyclohexanol）∶n（acetic acid） = 1.6 ∶ 1, the amount of catalyst of 6% to acid, reaction time 2.1 h and the amount of water carrying agent10 m L. Under the optimized conditions, the yield of cyclohexyl acetate reached 92.1%, in close agreement with values predicted by the mathematical model. The ionic liquids could be recycled and reused 6 times without obvious drop in activity, further indicating that the catalysts have good repetition.

关 键 词：乙酸环己酯 离子液体 酯化反应 响应面法 

分 类 号：TQ657[化学工程—精细化工]