Vapor Liquid Equilibria of Binary Mixtures of 1-Butyl-3-methylimidazolium Triflate (C4mimTfO) and Molecular Solvents: N-Alkyl Alcohols and Water

Marcus Stuckenholz, Emanuel A. Crespo, Lourdes F. Vega, Pedro J. Carvalho, João A.P. Coutinho, Wolffram Schröer, Johannes Kiefer, Bernd Rathke

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Abstract

Isobaric vapor liquid equilibria (VLE) of binary mixtures of the ionic liquid (IL) 1-butyl-3-methylimidazolium trifluoromethanesulfonate (C4mimTfO) with either water or short chained n-alkyl alcohols (methanol, ethanol, propan-1-ol, and butan-1-ol) are described in this study. Two different microebulliometers and a classical VLE apparatus were compared and the VLEs were determined in the composition range 0.4 ≤ x(solvent) ≤ 1 at three different pressure levels (p = 500 mbar, 700 mbar, and 1000 mbar). The experimental data were modeled using the soft-SAFT equation of state, which was able to accurately describe the nonideal behavior of these mixtures. The combined experimental-modeling results obtained contribute to establish the structure-property relationship between the C4mimTfO and n-alkyl alcohol molecules and to infer about its influence on the phase behavior of these solvents.

Original languageBritish English
Pages (from-to)6017-6032
Number of pages16
JournalJournal of Physical Chemistry B
Volume122
Issue number22
DOIs
StatePublished - 7 Jun 2018

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