Experimental and theoretical study on infinite dilution activity coefficients of various solutes in ionic liquid 1-propyl-2,3-dimethylimidazolium bis(trifluoromethylsulfonyl)imide

Infinite Dilution Activity Coefficient Measurements for 1-Methyl-4-(1-methylethenyl)-cyclohexene as a Green Solvent for Separation

“… g Krummen and Gmehling h He et al i Möllmann and Gmehling j Interpolate; [4C 1 NCl]:[EG]: tetramethylammonium chloride + ethylene glycol; [4C 1 NCl] + [Hdiol]: tetramethylammonium chloride + 1,6 hexanediol; [4C 1 NCl] + [Gly]: tetramethylammonium chloride + glycerol; [BMIM]­[SCN]: 1-butyl-3-methylimidazolium thiocyanate; [C 6 H 13 OCH 2 MIM]­[NTf 2 ]: 1-hexyloxymethyl-3-methyl-imidazolium bis­(trifluoromethylsulfonyl)-imide; [C 5 C 1 Pip]­[NTf 2 ]: 1- n -alkyl-1-methylpiperidium bis­{(trifluoromethyl)­sulfonyl}­imide; [C 6 C 1 Pip]­[NTf 2 ]: 1- n -alkyl-1-methylpiperdinium bis­[(trifluoromethyl)­sulfonyl]­imides; [PMMIM]­[NTf 2 ]: 1-butyl-3-methylimidazolium bis­(trifluoromethylsulfonyl)­imide; NMP: N -methyl-2-pyrrolidone; and NFM: N -formylmorpholine. …”

Infinite Dilution Activity Coefficients and Gas–Liquid Partition Coefficients of Organic Compounds in Ionic Liquid 1-Butyl-2,3-dimethylimidazolium Thiocyanate: Measurements and LFER Calculations

“…In trialkyl-substituted imidazolium-based ILs with another methyl group on the 1,3-alkyl-substituted imidazole ring, not an acidic proton at the 2-position, the aromaticity of the ILs may change and different characteristics may emerge compared to the 1,3-substituted imidazolyl ILs, for example, the selectivity or the extractive capacity in the separation process may improve. − It is useful to measure the γ i ∞ data of various solutes in trialkyl-substituted imidazolyl ILs because the data are relatively few. Our group measured the thermodynamic properties of some ILs with trialkyl-substituted imidazolium rings. − ILs containing the imidazolium cation and thiocyanate anion [SCN – ] are attracting considerable attention for industrial applications due to low viscosity, low melting point, and good conductivity, especially the low values of viscosity . In comparison to the ILs containing fluorinated anions, which may cause environmental problems due to degradation and release of HF, the SCN-based ILs are considered for being really “green solvents”, which have been used in different areas such as CO 2 capture, design and optimization of the membrane technology, and inhibition of corrosion, and are considered a potentially effective extractant for the separation of aliphatic from aromatic hydrocarbons or in the desulfurization of model fuels. − We have measured the γ i ∞ of 32 solutes in the IL 1-propyl-2,3-dimethylimidazolium thiocyanate ([PMMIM]­[SCN]) .…”