ABSTRACT

The vapor pressure osmometry technique (VPO) was used in this study to determine the osmotic and activity coefficients of several mixtures which contain 1-propanol and an equimolar mixture of two ionic liquids at T = 323.15 K. The equimolar mixture of ionic liquids is formed by 1-alkyl-3-methylimidazolium and/or 1-alkyl-3-methylpyridinium-based ionic liquids with bis(trifluoromethylsulfonyl)imide as anion. A comparison between the results obtained in this work and those for mixtures with the same alcohol and the corresponding pure ionic liquids forming the equimolar mixture was carried out so the effect that mixing two ionic liquids can have on the osmotic and activity coefficients and vapor depression of the solvent can be analyzed. The Pitzer model for mixed electrolytes has been applied to represent the experimental data, and the standard relative deviations obtained between the calculated and experimental osmotic coefficients were found to be less than 0.075.

Compounds

#	Formula	Name
1	C8H11F6N3O4S2	1-ethyl-3-methylimidazolium bis((trifluoromethyl)sulfonyl)imide
2	C10H15F6N3O4S2	1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide
3	C12H19F6N3O4S2	1-hexyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide
4	C10H12F6N2O4S2	1-ethyl-3-methylpyridinium bis((trifluoromethyl)sulfonyl)amide
5	C12H16F6N2O4S2	1-butyl-3-methylpyridinium 1,1,1-trifluoro-N-[(trifluoromethyl)sulfonyl]methanesulfonamide
6	C3H8O	propan-1-ol

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	6 1 3	(Relative) activity - 6 ; Liquid	Molality, mol/kg - 1; Liquid Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vapor Pressure Osmometer	11
POMD	6 1 2	(Relative) activity - 6 ; Liquid	Molality, mol/kg - 1; Liquid Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vapor Pressure Osmometer	12
POMD	6 5 4	(Relative) activity - 6 ; Liquid	Molality, mol/kg - 5; Liquid Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vapor Pressure Osmometer	10
POMD	6 3 4	(Relative) activity - 6 ; Liquid	Molality, mol/kg - 3; Liquid Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vapor Pressure Osmometer	10

Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Activity and Osmotic Coefficients of Binary Mixtures of NTf2 Ionic Liquids with a Primary Alcohol

Calvar, N.[Noelia], Dominguez, A.[Angeles], Macedo, E. A.[Eugenia A]

ABSTRACT