胆碱基碱性离子液体催化合成仲丁醇性能研究  

Study on catalytic synthesis of sec-butanol by tunable choline-based basic ionic liquids

作　　者：陈杰 林永胜 肖恺 杨臣 邱挺 CHEN Jie;LIN Yongsheng;XIAO Kai;YANG Chen;QIU Ting(College of Chemical Engineering,Fuzhou University,Fuzhou 350108,Fujian,China;Qingyuan Innovation Laboratory,Fujian,Quanzhou 362801,China;College of Environment&Safety Engineering,Fuzhou University,Fuzhou 350108,Fujian,China)

机构地区：[1]福州大学石油化工学院,福建福州350108 [2]清源创新实验室,福建泉州362801 [3]福州大学环境与安全工程学院,福建福州350108

出　　处：《化工学报》2023年第9期3716-3730,共15页CIESC Journal

基　　金：国家自然科学基金项目(22278077, 22108040);清源创新实验室重大项目(00221004);福建省自然科学基金重点项目(2022J02019);福建省自然科学基金青年项目(2020J05130)。

摘　　要：利用碱性催化剂催化乙酸仲丁酯与甲醇酯交换制备仲丁醇已成为化工领域的研究热点。相较于传统催化剂,碱性离子液体具有更高效的催化效率和稳定循环使用特性,是一种具有发展潜力的新型绿色催化剂。为此,设计合成了五种基于胆碱的碱性离子液体,通过表征与实验证实阴离子的碱性是影响其催化活性的关键因素。运用适宜催化剂咪唑化胆碱[Ch][IM]经响应面曲线法获得较适宜的催化反应条件:反应温度为45℃,醇酯比为4.42∶1,催化剂投加量为8.91%,其乙酸仲丁酯的转化率达到93.95%,高于醇钠等传统催化剂,展现出在酯交换反应体系中的高效性与在仲丁醇工业化生产过程中应用的可能性。The use of basic catalysts to catalyze the transesterification of sec-butyl acetate and methanol to prepare sec-butanol has become a research hotspot in the chemical industry.Compared to traditional basic catalysts,basic ionic liquids have more efficient catalytic efficiency and robust reusability,making them a new class of green catalysts with development potentials.Therefore,this study designed and synthesized five choline-based basic ionic liquids,and confirmed through characterization and experiments that the basicity of anions is a key factor affecting their catalytic activity.The results from the response surface method(RSM)analysis showed that suitable reaction conditions of imidazolized choline[Ch][IM]were as follows:the reaction temperature was 45℃,the alcohol ester ratio was 4.42∶1,and the catalyst dosage was 8.91%,the conversion rate of sec-butyl acetate reached 93.95%,which was much higher than that of traditional catalysts such as sodium alcohol,thus confirming its high catalytic efficiency in the transesterification reaction and the possibility of application in the industrial production of sec-butanol.

关 键 词：催化剂 化学反应 离子液体 仲丁醇 酯交换 

分 类 号：TQ426.94[化学工程]