Abstract
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...
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
