功能化酸性离子液体[BSO_3HMIM][PTSA]催化制备月桂酸乙酯
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摘要
制备了功能化酸性离子液体[BSO_3HMIM][PTSA],用于催化月桂酸和乙醇制备月桂酸乙酯,采用单因素实验探讨酸醇摩尔比、离子液体[BSO_3HMIM][PTSA]用量、反应温度和反应时间等因素对酯化率的影响。结果表明,当酸醇摩尔比n(月桂酸):n(无水乙醇)=1:3、离子液体[BSO_3HMIM][PTSA]用量为反应物总质量的6%、反应温度为85℃、反应时间为4 h时,酯化率可达91.5%,离子液体[BSO_3HMIM][PTSA]重复使用5次后,酯化率仍高于89%。
A functional acidic ionic liquid [BSO3 HMIM][PTSA] was prepared, which was used to catalyze lauric acid and ethanol to prepare ethyl Laurate. The effects of the molar ratio of acid and alcohol, the amount of ionic liquid [BSO3 HMIM][PTSA], reaction temperature and reaction time on the esterification rate were investigated by single factor experiment. The results show that the esterification rate can reach 91.5% when the molar ratio of acid to alcohol n is 1:3, the amount of ionic liquid [BSO3 HMIM][PTSA] is 6% of the total mass of reactants, the reaction temperature is 85 ℃ and the reaction time is 4 h. After repeated use of ionic liquid[BSO3 HMIM][PTSA] for 5 times, the esterification rate was still higher than 89%.
A functional acidic ionic liquid [BSO3 HMIM][PTSA] was prepared, which was used to catalyze lauric acid and ethanol to prepare ethyl Laurate. The effects of the molar ratio of acid and alcohol, the amount of ionic liquid [BSO3 HMIM][PTSA], reaction temperature and reaction time on the esterification rate were investigated by single factor experiment. The results show that the esterification rate can reach 91.5% when the molar ratio of acid to alcohol n is 1:3, the amount of ionic liquid [BSO3 HMIM][PTSA] is 6% of the total mass of reactants, the reaction temperature is 85 ℃ and the reaction time is 4 h. After repeated use of ionic liquid[BSO3 HMIM][PTSA] for 5 times, the esterification rate was still higher than 89%.
引文
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[2]刘树文.合成香料技术手册[M].北京:中国轻工业出版社,2000.
[3]马荣萱,宋延卫,杨华.硫酸钛催化月桂酸乙酯的合成研究[J].延安大学学报:自然科学版,2008,27(2):51~53.
[4]王芬华,黄江胜,李芳,等.二氧化硅负载磷钨酸催化合成月桂酸乙酯[J].安徽工程大学学报,2012,27(3):4~5.
[5]肖雅,李丽,武宝萍,等.介孔分子筛P-SBA-3催化合成月桂酸乙酯[J].精细石油化工进展,2009,10(10):31~33.
[6]李炳辉,龚显年,苏静,等.离子液体合成锂离子电池纳米二氧化钛负极材料[J].无机盐工业,2017(1):66~69.
[7]Cole A C,Jensen J L,Ntai I,et al.Novel Br nsted acidic ionic liquids and their use as dual solvent-catalysts[J].Journal of the American Chemical Society,2002,124(21):5962~5963.
[8]张香平,白银鸽,闫瑞一,等.离子液体萃取分离有机物研究进展[J].化工进展,2016,35(6):1587~1605.
[9]赵地顺,刘猛帅,徐智策,等.离子液体催化合成酯研究进展[J].化工进展,2011,30(10):2287~2293.
[10]Muhammad N,Elsheikh Y A,Mutalib M I A,et al.An overview of the role of ionic liquids in biodiesel reactions[J].Journal of Industrial&Engineering Chemistry,2015,21(1):1~10.
[11]李金娜,韩相恩,张立著,等.磺酸基功能化离子液体中水杨酸系列酯的合成研究[J].化工新型材料,2011,39(10):63~65.
[12]刘仕伟,于世涛,刘福胜,等.酸功能化离子液体磺烷基咪唑对甲苯磺酸盐催化合成松香甲酯的研究[J].林产化学与工业,2007,27(10):11~14.