化工学报 ›› 2013, Vol. 64 ›› Issue (6): 2086-2091.DOI: 10.3969/j.issn.0438-1157.2013.06.026

• 催化、动力学与反应器 • 上一篇    下一篇

磺酸功能化离子液体催化甘油与甲醇醚化反应

董超琦, 耿艳楼, 安华良, 赵新强, 王延吉   

  1. 河北工业大学绿色化工和高效节能河北省重点实验室,天津 300130
  • 收稿日期:2012-09-21 修回日期:2013-01-05 出版日期:2013-06-05 发布日期:2013-06-05
  • 通讯作者: 赵新强
  • 作者简介:董超琦(1986—),男,硕士研究生。
  • 基金资助:

    国家自然科学基金项目(21076059)。

Etherification of glycerol with methanol catalyzed by SO3H-functioned ionic liquids

DONG Chaoqi, GENG Yanlou, AN Hualiang, ZHAO Xinqiang, WANG Yanji   

  1. Heibei Provincial Key Laboratory of Green Chemical Technology and Efficient Energy Saving, Hebei University of Technology, Tianjin 300130, China
  • Received:2012-09-21 Revised:2013-01-05 Online:2013-06-05 Published:2013-06-05
  • Supported by:

    supported by the National Natural Science Foundation of China(21076059).

摘要: 考察了[HSO3-bmim]CF3SO3、[HSO3-bmim]P-TSA、[HSO3-bmim]HSO4和[HSO3-bmim]H2PO4四种磺酸功能化离子液体对甘油与甲醇醚化反应的影响。结果表明,离子液体的催化性能与其酸强度相关联,[HSO3-bmim]CF3SO3离子液体的酸强度最强,其催化性能也最好。以[HSO3-bmim]CF3SO3为催化剂,在w([HSO3-bmim]CF3SO3)/w(甘油)=0.5:1(质量比)、n(甲醇)/n(甘油)=8:1(摩尔比)、反应温度190℃、反应时间8 h时,甘油的转化率为84.5%,单甲基甘油醚的选择性为41.4%,二甲基甘油醚和三甲基甘油醚的联合选择性为34.1%。在此基础上,提出了离子液体[HSO3-bmim]CF3SO3催化甘油与甲醇醚化反应的反应机理。

关键词: 甘油, 甲醇, 醚化反应, 离子液体, 二甲基甘油醚, 三甲基甘油醚

Abstract: The catalytic performance of some SO3H-functionalized ionic liquids ([HSO3-bmim]CF3SO3,[HSO3-bmim]P-TSA,[HSO3-bmim]HSO4 and [HSO3-bmim]H2PO4) in the etherification of glycerol with methanol was evaluated,and the results showed that the catalytic performance of the ionic liquids correlated well with their acid strength.[HSO3-bmim]CF3SO3 had the highest acid strength and showed the best catalytic performance.Under the suitable reaction conditions of mass ratio of [HSO3-bmim]CF3SO3 to glycerol 0.5:1, molar ratio of methanol to glycerol 8:1, reaction temperature 190℃ and reaction time 8 h, conversion of glycerol was 84.5%, selectivity to methyl glycerol ethers and total selectivity to both dimethyl glycerol ethers and trimethyl glycerol ethers were 41.4% and 34.1%, respectively.In addition, the reaction mechanism for etherification of glycerol with methanol in the presence of[HSO3-bmim]CF3SO3 was proposed.

Key words: glycerol, methanol, etherification, ionic liquid, dimethyl glycerol ethers, trimethyl glycerol ethers

中图分类号: