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

ABSTRACT

The activity coefficients at infinite dilution, A13 , for hydrocarbon solutes and some alcohols in the ionic liquid trihexyltetradecylphosphonium bis(trifluoromethylsulfonyl)imide [3C6C14P][Tf2N] have been determined by gas-liquid chromatography at temperatures T ) (303.15, 308.15, 313.15, and 318.15) K. The selectivity values have been calculated at T ) 308.15 K, and the results indicate that the ionic liquid [3C6C14P][Tf2N] should not be considered as a solvent for separation of alkanes and aromatics. The partial molar excess enthalpy values at infinite dilution centsH1 E , determined in this work, together with the values A13 have been discussed in terms of intermolecular interactions and compared to results of related systems obtained from the literature.