ABSTRACT

Osmotic coefficients of the binary solutions of two room-temperature ionic liquids (1-butyl-3-methylimidazolium chloride and bromide) in methanol and ethanol have been measured at T = 298.15 K by the isopiestic method. The experimental osmotic coefficient data have been correlated using a forth-order polynomial in terms of (molality)^0.5, with both, ion interaction model of Pitzer and electrolyte non-random two liquid (e-NRTL) model of Chen. The values of vapor pressures of above-mentioned solutions have been calculated from the osmotic coefficients. The model parameters fitted to the experimental osmotic coefficients have been used for prediction of the mean ionic activity coefficients of those ionic liquids in methanol and ethanol.

Compounds

#	Formula	Name
1	CH4O	methanol
2	C8H15ClN2	1-butyl-3-methylimidazolium chloride
3	C8H15BrN2	1-butyl-3-methylimidazolium bromide
4	C2H6O	ethanol

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	Osmotic coefficient ; Liquid	Molality, mol/kg - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	ISOPIE	23
POMD	1 2	Vapor or sublimation pressure, kPa ; Liquid	Molality, mol/kg - 2; Liquid	Temperature, K; Liquid	Liquid Gas	Derived from isopiestic experiments	23
POMD	1 3	Osmotic coefficient ; Liquid	Molality, mol/kg - 3; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	ISOPIE	23
POMD	1 3	Vapor or sublimation pressure, kPa ; Liquid	Molality, mol/kg - 3; Liquid	Temperature, K; Liquid	Liquid Gas	Derived from isopiestic experiments	23
POMD	4 2	Osmotic coefficient ; Liquid	Molality, mol/kg - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	ISOPIE	27
POMD	4 2	Vapor or sublimation pressure, kPa ; Liquid	Molality, mol/kg - 2; Liquid	Temperature, K; Liquid	Liquid Gas	Derived from isopiestic experiments	27
POMD	4 3	Osmotic coefficient ; Liquid	Molality, mol/kg - 3; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	ISOPIE	27
POMD	4 3	Vapor or sublimation pressure, kPa ; Liquid	Molality, mol/kg - 3; Liquid	Temperature, K; Liquid	Liquid Gas	Derived from isopiestic experiments	27

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Osmotic and activity coefficients in the binary solutions of 1-butyl-3-methylimidazolium chloride and bromide in methanol or ethanol at T = 298.15 K from isopiestic measurements

Sardroodi, J. J.[Jaber Jahanbin], Azamat, J.[Jafar], Atabay, M.[Maryam]

ABSTRACT