L-天冬氨酸离子液体催化不同脂肪酸酯化的实验研究  

Experimental study on catalytic esterification of different fatty acids over L-aspartic acid ionic liquid

作　　者：汪文伟 赵振兴 郑礼 韩本勇[1,2] 王昌梅[1] 张无敌[1] 尹芳[1] 许玥[1] 杨斌[1] 赵兴玲[1] 吴凯[1] 柳静[1] 杨红[1] 刘士清[1] WANG Wen-wei;ZHAO Zhen-xing;ZHENG Li;HAN Ben-yong;WANG Chang-mei;ZHANG Wu-dil;YIN Fang;XU Yue;YANG Bin;ZHAO Xing-ling;WU Kai;LIU Jing;YANG Hong;LIU Shi-qing(Solar Energy Research Institute,Yunnan Normal University,Kunming 650500,China;Faculty of Life Science and Technology,Kunming University of Science and Technology,Kunming 650504,China)

机构地区：[1]云南师范大学太阳能研究所,云南昆明650500 [2]昆明理工大学生命科学与技术学院,云南昆明650504

出　　处：《现代化工》2021年第5期153-157,共5页Modern Chemical Industry

基　　金：云南省国际科技特派员项目(2015IA022);云南省农村能源工程重点实验室基金项目(2017KF03);云南师范大学大学生科学研究训练项目(ky2017-137,ky2018-142)。

摘　　要：采用实验室自制的天冬氨酸硫酸盐离子液体[Asp]HSO_(4)催化月桂酸和硬脂酸酯化制备相应脂肪酸甲酯。考察了反应时间、反应温度、甲醇与原料物质的量之比以及[Asp]HSO_(4)用量对脂肪酸甲酯的影响。结果表明,以月桂酸为原料,在反应时间为24 h、反应温度为65℃、n(甲醇)∶n(月桂酸)为3∶1以及[Asp]HSO_(4)质量分数为5%时具有较为优良的催化效果,催化效率可达到91.09%;以硬脂酸为原料时,最佳反应条件为反应时间为15 h、反应温度为55℃、n(甲醇)∶n(硬脂酸)为5∶1以及[Asp]HSO_(4)质量分数为5%,催化效率可达到93.16%。该催化剂重复使用4次,催化效率仍然可达到90%以上,具有很好的重复使用性能。Methyl ester of fatty acids are prepared via catalytic esterification of lauric acid and stearic acid over L-aspartic acid sulfate ionic liquid[Asp]HSO_(4) made in the laboratory.The effects of reaction time,reaction temperature,the ratios of methanol to lauric acid and stearic acid,and the addition amount of[Asp]HSO_(4) on the catalytic preparation are investigated.It is found that an excellent catalytic effect can be realized with a catalytic efficiency of 91.09%when lauric acid is used as raw materials,reaction lasts for 24 h,reaction temperature remains at 65℃,n(methanol)∶n(lauric acid)is 3∶1,and[Asp]HSO_(4) dosage is 5%.The catalytic efficiency can reach 93.16%when stearic acid is used as raw material,reaction lasts for 15 h,reaction temperature maintains at 55℃,n(methanol)∶n(stearic acid)is 5∶1,and[Asp]HSO_(4) dosage is 5%.The catalytic efficiency can still exceed 90%after the catalyst is reused for 4 times.

关 键 词：L-天冬氨酸离子液体 酯化反应 月桂酸甲酯 硬脂酸甲酯 

分 类 号：TQ645[化学工程—精细化工] TK63[动力工程及工程热物理—生物能]