ABSTRACT

Measurements of osmotic coefficients of BMimMSO4 (1-butyl-3-methylimidazolium methylsulfate) and MMimMSO4 (1,3-dimethylimidazolium methylsulfate) with ethanol, 1-propanol, and 2-propanol at T = 323.15 K are reported in this work. Vapour pressure and activity values for the binary systems studied are obtained from experimental results. The osmotic coefficients are correlated using the extended Pitzer model modified by Archer and the modified NRTL (MNRTL) model. The standard deviations obtained with both models are lower than 0.013 and 0.060, respectively. The parameters obtained with the extended Pitzer model of Archer are used to calculate the mean molal activity coefficients and the excess Gibbs free energy of the binary mixtures.

Compounds

#	Formula	Name
1	C6H12N2O4S	1,3-dimethylimidazolium methylsulfate
2	C9H18N2O4S	1-butyl-3-methylimidazolium methyl sulfate
3	C3H8O	propan-1-ol
4	C3H8O	propan-2-ol
5	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	4 2	Osmotic coefficient ; Liquid	Molality, mol/kg - 2; Liquid	Temperature, K; Liquid	Liquid Gas	vapour pressure osmometer	15
POMD	5 1	Osmotic coefficient ; Liquid	Molality, mol/kg - 1; Liquid	Temperature, K; Liquid	Liquid Gas	vapour pressure osmometer	18
POMD	3 1	Osmotic coefficient ; Liquid	Molality, mol/kg - 1; Liquid	Temperature, K; Liquid	Liquid Gas	vapour pressure osmometer	16
POMD	4 1	Osmotic coefficient ; Liquid	Molality, mol/kg - 1; Liquid	Temperature, K; Liquid	Liquid Gas	vapour pressure osmometer	15
POMD	5 2	Osmotic coefficient ; Liquid	Molality, mol/kg - 2; Liquid	Temperature, K; Liquid	Liquid Gas	vapour pressure osmometer	15
POMD	3 2	Osmotic coefficient ; Liquid	Molality, mol/kg - 2; Liquid	Temperature, K; Liquid	Liquid Gas	vapour pressure osmometer	12

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Osmotic coefficients of binary mixtures of 1-butyl-3-methylimidazolium methylsulfate and 1,3-dimethylimidazolium methylsulfate with alcohols at T = 323.15 K

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

ABSTRACT