ABSTRACT

The present work was focused on the study of two imidazolium-based ionic liquids (ILs) as solvents in liquid liquid extraction of ethanol from aqueous mixtures. With this aim, the experimental liquid liquid equilibria (LLE) data of water (1) + ethanol (2) + 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfo nyl)imide ([emim][Tf2N]) (3) and water (1) + ethanol (2) + 1-hexyl-3-methylimidazolium bis(trifluorome thylsulfonyl)imide ([hmim][Tf2N]) (4) systems were obtained at different temperatures: 283.2, 303.2, and 323.2 K, in order to check the influence of temperature. The results were correlated by nonrandom two-liquid (NRTL) and universal quasichemical (UNIQUAC) models with good concordance in both cases. Finally, the ability of the two ILs to act as solvents was studied by evaluating the coefficient distribution and the selectivity of ternary systems and compared with another IL from the literature.

Compounds

#	Formula	Name
1	H2O	water
2	C2H6O	ethanol
3	C8H11F6N3O4S2	1-ethyl-3-methylimidazolium bis((trifluoromethyl)sulfonyl)imide
4	C12H19F6N3O4S2	1-hexyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide

Datasets

The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type	Compound-#	Property	Variable	Constraint	Phase	Method	#Points
POMD	1 2 3	Mole fraction - 2 ; Liquid mixture 2 Mole fraction - 2 ; Liquid mixture 1 Mole fraction - 1 ; Liquid mixture 1	Temperature, K; Liquid mixture 1 Mole fraction - 1; Liquid mixture 2	Pressure, kPa; Liquid mixture 2	Liquid mixture 2 Liquid mixture 1	Chromatography Chromatography Chromatography	21
POMD	1 2 4	Mole fraction - 2 ; Liquid mixture 2 Mole fraction - 2 ; Liquid mixture 1 Mole fraction - 1 ; Liquid mixture 1	Temperature, K; Liquid mixture 1 Mole fraction - 1; Liquid mixture 2	Pressure, kPa; Liquid mixture 2	Liquid mixture 2 Liquid mixture 1	Chromatography Chromatography Chromatography	24
POMD	1 3	Mole fraction - 1 ; Liquid mixture 2	Temperature, K; Liquid mixture 1	Pressure, kPa; Liquid mixture 2	Liquid mixture 2 Liquid mixture 1	Chromatography	3
POMD	1 3	Mole fraction - 1 ; Liquid mixture 1	Temperature, K; Liquid mixture 1	Pressure, kPa; Liquid mixture 2	Liquid mixture 1 Liquid mixture 2	Chromatography	3
POMD	1 4	Mole fraction - 1 ; Liquid mixture 1	Temperature, K; Liquid mixture 1	Pressure, kPa; Liquid mixture 2	Liquid mixture 1 Liquid mixture 2	Chromatography	3

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Study of liquid-liquid extraction of ethanol + water azeotropic mixtures using two imidazolium-based ionic liquids

Chafer, Amparo, de la Torre, Javier, Loras, Sonia, Monton, Juan B.

ABSTRACT