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
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
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DOI：
10.1021/acs.iecr.5b01325
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发表时间：
2015-08
影响因子：
4.2
通讯作者：
Yingjie Xu;Tingting Li;C. Peng;Honglai Liu
中科院分区：
文献类型：
--
作者：
Yingjie Xu;Tingting Li;C. Peng;Honglai Liu
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 ac...
