化工学报 ›› 2012, Vol. 63 ›› Issue (4): 1089-1094.DOI: 10.3969/j.issn.0438-1157.2012.04.015

• 催化、动力学与反应器 • 上一篇    下一篇

离子液体催化合成丁二酸二甲酯

赵地顺1,刘猛帅1,徐智策1,张娟1,张笛1,付江涛1,任培兵1,2   

  1. 1河北科技大学化学与制药工程学院,河北 石家庄 050018;2石家庄焦化集团有限责任公司,河北 石家庄 050031
  • 收稿日期:2011-08-27 修回日期:2012-01-13 出版日期:2012-04-05 发布日期:2012-04-05
  • 通讯作者: 赵地顺

Synthesis of dimethyl succinate catalyzed by ionic liquids

ZHAO Dishun1, LIU Mengshuai1, XU Zhice1, ZHANG Juan1, ZHANG Di1, FU Jiangtao1, REN Peibing1,2   

  1. 1School of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, Hebei, China;2Shijiazhuang Coking and Chemical Group Co., Ltd., Shijiazhuang 050031, Hebei, China
  • Received:2011-08-27 Revised:2012-01-13 Online:2012-04-05 Published:2012-04-05

关键词: 丁二酸二甲酯, 离子液体, 酯化反应, 催化剂, 反应机理

Abstract: Seven kinds of ionic liquids, N-methyl-imidazolium bisulfate([Hmim]HSO4),1-butyl-3-methyl imidazole phosphate([Bmim]H2PO4), 1-butyl-3-methyl imidazole bisulfate([Bmim]HSO4), 1-butyl-3-methyl imidazole tetrafluoroborate([Bmim]BF4), N-butyl-pyridine bisulfate([Bpy]HSO4), N-butyl-pyridine phosphate([Bpy]H2PO4), N-ethyl-pyridine bisulfate([Epy]HSO4), were designed and synthesized.The synthesis of dimethyl succinate catalyzed by ionic liquids was studied for the first time.It was shown that[Epy]HSO4 had the best catalytic performance, and optimal conditions for the synthesis of dimethyl succinate were obtained, succinic acid and methanol molar ratio 1∶3.0, amount of catalyst 5%(g/g)of succinic acid, reaction temperature 70℃ and reaction time 2 h.Under the optimal conditions, the yield of dimethyl succinate was up to 91.83%, esterification rate was 96.32%.The catalyst was recycled 7 times without substantial decrease in activity.Moreover, compared to conventional industrial catalysts, ionic liquid catalyst had the superiority of smaller catalyst dosage, less by-product, mild reaction conditions, high yield, and recycled catalyst usage.Finally, the mechanism of esterification catalyzed by ionic liquids was discussed.

Key words: dimethyl succinate, ionic liquid, esterification, catalyst, reaction mechanism

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