Abstract
Activity coefficients at infinite dilution of 46 solutes such as alkanes, alkenes, alkylbenzenes, linear and branched C1−C6 alcohols, esters, aldehydes, cyclohexanone oxime, and e-caprolactam in the ionic liquid (IL) 1-ethyl-3-methylimidazolium ethyl sulfate or [EMIM][EtSO4] have been determined by gas chromatography using the IL as the stationary phase. The measurements were carried out at different temperatures between (302 and 396) K. From the temperature dependence of the limiting activity coefficients, partial molar excess enthalpies at infinite dilution of the solutes in the ILs have been derived. Vapor−liquid equilibria (VLE) of binary mixtures containing water with [EMIM][EtSO4] were studied using the transpiration method. VLE measurements were carried out over the broad concentration range at temperatures between (302.9 and 322.9) K. Activity coefficients γi of water in the [EMIM][EtSO4] have been determined from the VLE data and are described formally by using the NRTL equation. Furthermore, act...
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