Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

Activity coefficients at infinite dilution ci yen of solutes such as alkanes, alkenes, and alkylbenzenes as well as of the linear and branched C1-C6 alcohols, esters, and aldehydes in the ionic liquids trimethyl-butylammonium bis(trifluoromethylsulfonyl) imide [Me3BuN][NTf2] have been determined by gas chromatography using the ionic liquids as stationary phase. The measurements were carried out at different temperatures between 302 K and 393 K. From the temperature dependence of the limiting activity coefficients, partial molar excess enthalpies at infinite dilution Hi E,yen of the solutes in the ionic liquids have been derived. Vapor-liquid equilibria (VLE) of binary mixtures containing methanol, ethanol, and propan-1-ol in [Me3BuN][NTf2] were studied by using a static method. VLE measurements were carried out covering the whole concentration range at four different temperatures between 298.15 K and 313.15 K. Activity coefficients ci of solutes in the ionic liquid and their osmotic coefficients ?i in the [Me3BuN][NTf2] have been determined from the VLE data and are described formally by using the NRTL equation. ci yen and Hi E,yen for methanol, ethanol, and propan-1-ol in [Me3BuN][NTf2] are derived from the both the GC and the static method.