Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

ABSTRACT

The activity coefficients at infinite dilution, c1 13 and (gas + liquid) partition coefficients, KL for 61 solutes: alkanes, alkenes, alkynes, cycloalkanes, aromatic hydrocarbons, alcohols, thiophene, ethers, ketones, esters, butanal, nitrogen compounds and water in the ionic liquid 4-(3-hydroxy)-4-methylmorpholinium bis(trifluoromethylsulfonyl)-amide were determined by (gas + liquid) chromatography at the temperatures from (298.15 to 368.15) K. The 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 13 values obtained over the temperature range. The selectivities and capacities at infinite dilution for selected extraction problems (water/butanol, hexane/benzene, heptane/thiophene) were calculated from the c1 13 and compared to the literature values for other ionic liquids based on bis(trifluoromethylsulfonyl)-amide anion. The values of KL were used to determine the linear free energy relationship (LFER) system constants as a function of temperature. The density and viscosity of the investigated ionic liquid at temperatures from (298.15 to 368.15) K as well as other physicochemical properties: temperature of fusion and glass transition temperature were also measured.