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Isobaric Vapor−Liquid Equilibrium for Ethyl Acetate + Ethanol + 1-Ethyl-3-methylimidazolium Tetrafluoroborate^†

Qunsheng Li, Jiguo Zhang, Zhigang Lei*, Jiujuan Zhu and Fengying Xing

State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Box 35, Beijing, 100029, China

J. Chem. Eng. Data, 2009, 54 (2), pp 193–197

Publication Date (Web): August 5, 2008

* To whom correspondence should be addressed. Tel.: +86 10 64433695. E-mail: leizhg@mail.buct.edu.cn., †

Part of the special issue “Robin H. Stokes Festschrift”.

This article is part of the

Robin H. Stokes Festschrift

special issue.

Abstract

Isobaric vapor−liquid equilibrium (VLE) data for ethyl acetate (1) + ethanol (2) containing ionic liquid (IL) 1-ethyl-3-methylimidazolium tetrafluoroborate ([EMIM]⁺[BF₄]⁻) (3) at atmospheric pressure (101.32 kPa) were measured with a modified Othmer still. It was observed that the VLE data containing the IL were obviously different from that of the IL-free system. The IL investigated showed a notable salting-out effect, which enhanced the relative volatility of ethyl acetate to ethanol and gave rise to the elimination of the azeotropic point at a specific IL mole fraction. It was found that the salting-out effect followed the order of x₃ = 0.30 > x₃ = 0.20 > x₃ = 0.07. The measured ternary data were correlated using the NRTL model.

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History

Published In Issue February 12, 2009
Article ASAPAugust 05, 2008
Received: March 12, 2008
Accepted: June 27, 2008

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Article

Isobaric Vapor−Liquid Equilibrium for Ethyl Acetate + Ethanol + 1-Ethyl-3-methylimidazolium Tetrafluoroborate^†