Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

ABSTRACT

This work is continuation of our systematic study of activity coefficients at infinite dilution, c1 of different organic solutes and water in the ionic liquids. New data of c1 were determined for 62 solutes, including alkanes, alkenes, alkynes, cycloalkanes, aromatic hydrocarbons, alcohols, thiophene, ethers, ketones, esters, 1-nitropropane, butanal, acetonitrile, and water in the ionic liquid 1-(2-methoxyethyl)-1-methylpiperidinium trifluorotris(perfluoroethyl)phosphate by inverse gas chromatography at the temperature range from (318.15 to 368.15) K. The basic thermodynamic functions, namely partial molar excess Gibbs free energies, DGE;1 1 , enthalpies, DHE;1 1 and entropies, DSE;1 1 at infinite dilution were calculated from the experimental c1 values obtained over the temperature range. Additionally the gas liquid partition coefficients, KL were determined. Results are compared to previously investigated ionic liquids with the same cations or anions. Values of the selectivity and capacity at infinite dilution for heptane/benzene, heptane/ thiophene, and heptane/methanol extraction problems were calculated from experimental c1 values to verify the possibility of investigated ionic liquid as an entrainer in liquid liquid extraction.