CIESC Journal ›› 2014, Vol. 65 ›› Issue (2): 561-569.DOI: 10.3969/j.issn.0438-1157.2014.02.028

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Synthesis of succinic acid diisopropyl ester catalyzed by Lewis acid ionic liquids

ZHAO Dishun, GE Jingjing, ZHAI Jianhua, ZHANG Juan, LIU Mengshuai, LI Junpan   

  1. School of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, Hebei, China
  • Received:2013-04-27 Revised:2013-08-16 Online:2014-02-05 Published:2014-02-05
  • Supported by:

    supported by the National Natural Science Foundation of China (20576026, 21106032).

Lewis酸性离子液体催化合成丁二酸二异丙酯

赵地顺, 葛京京, 翟建华, 张娟, 刘猛帅, 李俊盼   

  1. 河北科技大学化学与制药工程学院, 河北 石家庄 050018
  • 通讯作者: 赵地顺(1945- ),男,教授。
  • 基金资助:

    国家自然科学基金项目(20576026,21106032)。

Abstract: Nine kinds of different Lewis acid ionic liquids were synthesized by two-step process and their structures were characterized with 1H NMR and FT-IR. Lewis acid ionic liquids prepared were used to catalyze the esterification reaction of succinic acid and isopropyl alcohol. With the increase of dosage of halide, the ionic liquids showed stronger acidity. [Bmim]Br-Fe2Cl6 had the best catalytic performance, and optimal conditions for the synthesis of succinic acid diisopropyl ester were obtained as follows, amount of catalyst 10.0%(g/g)of succinic acid, reaction temperature 100℃ and reaction time 4 h, succinic acid and isopropyl alcohol ratio 1:5. Under the optimal conditions, the yield of succinic acid diisopropyl ester was up to 88.9%, esterification rate was 92.7%.The catalyst was recycled 6 times, and the yield of succinic acid diisopropyl ester only decreased by 1.7%.

Key words: ionic liquid, Lewis acid, esterification, diisopropyl succinate, catalyst

摘要: 采用两步法制备了9种不同的Lewis酸性离子液体,采用1H NMR、FT-IR对离子液体的结构进行了表征,并系统地考察了其对丁二酸和异丙醇酯化反应的催化性能。结果表明,离子液体随着卤化物用量增加表现出更强的酸性。其中[Bmim]Br-Fe2Cl6催化合成丁二酸二异丙酯效果良好,催化剂用量为丁二酸质量的10.0%,反应温度100℃,反应时间4 h,酸醇摩尔比为1:5,丁二酸二异丙酯收率为88.9%,酯化率达92.7%。离子液体重复使用6次后,产品收率下降1.7%。

关键词: 离子液体, Lewis酸, 酯化, 丁二酸二异丙酯, 催化剂

CLC Number: