Vapor−liquid equilibria of binary mixtures containing high-boiling solutes methoxy-benzene, (hydroxymethyl)-benzene, 1,2-ethanediol, and 1,4-butanediol and ionic liquid [EMIM][NTf 2 ] were studied by using the transpiration method. VLE measurements were carried out over the whole concentration range at different temperatures between 298 K and 363 K. Activity coefficients γ i of these solvents in the ionic liquid have been determined from these data and are described formally by using the NRTL equation. In addition, vapor pressures of pure solutes methoxy-benzene, (hydroxymethyl)-benzene, 1,2-ethanediol, and 1,4-butanediol have been measured as a function of temperature, and their enthalpies of vaporization have been obtained.
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Vasiltsova et al. (2004) studied this question.
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