文献类型：期刊文献

英文题名：Influence of C2-H of Imidazolium-Based Ionic Liquids on the Interaction and Vapor-Liquid Equilibrium of Ethyl Acetate + Ethanol System: [Bmim]BF4 vs [Bmmim]BF4

作者：Xu, Yingjie[1,2]; Li, Tingting[2]; Peng, Changjun[2]; Liu, Honglai[2]

机构：[1] Department of Chemistry, Shaoxing University, Shaoxing, 312000, China; [2] State Key Laboratory of Chemical Engineering, Department of Chemistry, East China University of Science and Technology, Shanghai, 200237, China

年份：2015

卷号：54

期号：36

起止页码：9038

外文期刊名：Industrial and Engineering Chemistry Research

收录：EI(收录号：20153801292001)

语种：英文

外文关键词：Hydrogen bonds - Ionic liquids - Phase equilibria

摘要：The effect of C2-H of alkylimidazolium tetrafluoroborate ionic liquids on the interaction and vapor-liquid equilibrium (VLE) of the ethyl acetate + ethanol mixture was studied using spectroscopy and the COSMO-RS method. Concentration-dependent 1H NMR chemical shifts of ethyl acetate + ethanol + [Bmim]BF4 or [Bmmim]BF4 (xIL = 0.1 and 0.3) systems show that the interaction between [Bmim]BF4 and ethanol is much stronger than that between [Bmmim]BF4 and ethanol. Moreover, the experimental and predicted VLE demonstrate that the improvement of relative volatility of ethyl acetate to ethanol by [Bmim]BF4 is better than that by [Bmmim]BF4. Also, σ-profile obtained from COSMO-RS method indicates that the hydrogen bonding donator ability of [Bmim]+ is greater than that of [Bmmim]+. Therefore, it can be deduced that the acidic C2-H plays an important role in the interaction differentiation of the ionic liquids and their effect on the VLE of the ethyl acetate + ethanol system, resulting from the interaction of the acidic C2-H with the ethanol that is much stronger than with the ethyl acetate. ? 2015 American Chemical Society.