Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

ABSTRACT

Activity coefficients at infinite dilution, 13, for 32 organic compounds: alkanes, alk-1-enes, alk-1-ynes, cycloalkanes, aromatic hydrocarbons, alcohols, thiophene, tetrahydrofuran, tert-butyl methyl ether and water in the ionic liquid 1-butyl-1-methylpyrrolidinium trifluoromethanesulfonate [BMPYR][CF3SO3] were determined by gas.liquid chromatography at the temperatures ranging from 298.15 to 368.15 K. The partial molar excess enthalpies at infinite dilution HE, 1 were calculated from the experimental 13 values obtained over the temperature range. The selectivities for the n-hexane/benzene, cyclohexane/benzene, n-hexane/thiophene, cyclohexane/thiophene, benzene/thiophene and hexen-1- ene/n-hexane separation problems were calculated from the 13 and compared to the literature values for other ionic liquids, NMP and sulfolane.