Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

ABSTRACT

This work presents new data of activity coefficients at infinite dilution, c 1 of different organic solutes and water in the 1-(2-methoxyethyl)-1-methylpyrrolidinium trifluorotris(perfluoroethyl)phosphate ionic liquid. Values of c 1 were determined for 62 solutes, including alkanes, alkenes, alkynes, cycloalkanes, aromatic hydrocarbons, alcohols, thiophene, ethers, ketones, esters, 1-nitropropane, butanal, acetonitrile and water by inverse gas chromatography over the temperature range from (318.15 to 368.15) K. The basic thermodynamic functions, namely partial molar excess Gibbs energies, enthalpies and entropies at infinite dilution were calculated from the experimental values obtained over the temperature range. Additionally the gas liquid partition coefficients, K L were determined. Experi- mental values of gas liquid partition coefficients were used to determine the coefficients in the Abraham solvation parameter model (LFER). Results are compared to previously investigated ionic liquids with the same cations or anions. The selectivities and capacities at infinite dilution for alkanes/thiophene extrac- tion problems were calculated from experimental c 1 values to verify the possibility of investigated ionic liquid as an entrainer in liquid liquid extraction.