(Vapour+liquid) equilibria, (VLE) excess molar enthalpies and infinite dilution activity coefficients of selected binary systems involving n-hexyl pyridinium bis(trifluoromethylsulphonyl)imide ionic liquid: Experimental and predictions using modified UNIFAC (Dortmund)

Determination of Activity Coefficients at Infinite Dilution of Solutes in N,N′-Di(2-ethylhexyl)isobutyramide Using Inverse Gas–Liquid Chromatography

“…The Supporting Information is available free of charge on the ACS Publications website at DOI: 10.1021/acs.jced.8b00635. H NMR spectra (Table S1 and Figure S1) and 13 C NMR spectra (Table S2 and Figure S2) for synthesis of D2EHIBA and computed vapor pressure, molar volume, and virial coefficients of solutes at column temperature T = (323.15 to 373.15) K (Table S3) (PDF)…”

“…The synthesis and characterization of N,N′-di(2ethylhexyl)isobutyramide (D2EHIBA) was carried out as described elsewhere. 18,19 1 H NMR and 13 C NMR spectra are provided for synthesis of D2EHIBA in the Supportin Information as Tables S1 and S2 and Figures S1 and S2. Its mass fraction purity was above 98.5%.…”

“…Spectroscopic and chromatographic methods are used to establish solvent strength and solvent selectivity, respectively. Inverse gas–liquid chromatography has become a widely accepted technique for measuring several thermodynamic properties, namely, activity coefficient at infinite dilution, Flory–Huggins interaction parameter, solubility parameter, partition coefficient, and diffusion coefficients of various solutes in solvents. − Activity coefficients at infinite dilution (γ 13 ∞ ) of solute in solvent provide basic information on the intermolecular interactions between solute and solvent at infinite dilution. − It is used for characterizing the behavior of liquid mixtures for estimation of mutual solubility, screening solvents for extraction, extractive distillation processes, and calculation of limiting separation factors. It can also be used to calculate basic thermodynamics functions, such as partial molar excess Gibbs energies, molar sorption enthalpies, and entropies over the relevant temperature range.…”

Isothermal Vapor–Liquid Equilibrium Data for the Toluene + Methanol + N-Butylpyridinium Bromide System

“…VLE data, some physical and chemical properties of several binary systems containing ionic liquid based on pyridinium-type cation, have recently been published . Phase transition and decomposition temperatures, heat capacities, and viscosities of pyridinium ionic liquids were earlier studied .…”

“…20,21 VLE data, some physical and chemical properties of several binary systems containing ionic liquid based on pyridiniumtype cation, have recently been published. 25 Phase transition and decomposition temperatures, heat capacities, and viscosities of pyridinium ionic liquids were earlier studied. 26 There is no information about VLE data for the system toluene + methanol + N-butylpyridinium bromide ([Bpy][Br]) in the literature.…”