ABSTRACT

Several methylsulfate and chloride anion-based ionic liquids, such as 1-alkyl-3-methyl imidazolium methyl sulfate, CnMIM CH3SO4 (n = 1, 2, and 4), 1-benzyl-3-methyl imidazolium methylsulfate, BzMIM CH3SO4, 1-benzyl, or hexyl-3-methyl imidazolium chloride, XMIM Cl (X = Bz and Hx), and methylpyridinium methylsulfate, Mpy CH3SO4, with sodium carbonate, Na2CO3, as phase forming salt, have been investigated and discussed for their potential use in separations based on aqueous two-phase systems (ATPS). Phase diagrams have been experimentally ascertained at T = 298.15 K, and Merchuck equation and a variation of this model have been used for correlating the binodal data. The alkyl chain length in the cation and the type of anion and cation have been explored and discussed due to their decisive influence in the ATPS behavior. The consistence of tie-line data was ascertained by applying the Othmer-Tobias and Bancroft equations.

Compounds

#	Formula	Name
1	C9H18N2O4S	1-butyl-3-methylimidazolium methyl sulfate
2	C7H14N2O4S	1-ethyl-3-methylimidazolium methylsulfate
3	C11H13ClN2	1-benzyl-3-methyl-1H-imidazolium chloride
4	C10H19ClN2	1-hexyl-3-methylimidazolium chloride
5	C7H11NO4S	1-methylpyridinium methylsulfate
6	CNa2O3	sodium carbonate
7	H2O	water
8	C12H16N2O4S	1-benzyl-3-methyl-1H-imidazolium methyl sulfate
9	C6H12N2O4S	1,3-dimethylimidazolium methylsulfate

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 7 8	Mass fraction - 6 ; Liquid mixture 1	Mass fraction - 8; Liquid mixture 1	Pressure, kPa; Liquid mixture 1 Temperature, K; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2	Titration method	45
POMD	6 7 8	Mass fraction - 6 ; Liquid mixture 2 Mass fraction - 6 ; Liquid mixture 1 Mass fraction - 8 ; Liquid mixture 1	Mass fraction - 8; Liquid mixture 2	Temperature, K; Liquid mixture 2 Pressure, kPa; Liquid mixture 2	Liquid mixture 2 Liquid mixture 1	Titration method Titration method Titration method	4
POMD	6 7 9	Mass fraction - 6 ; Liquid mixture 1	Mass fraction - 9; Liquid mixture 1	Pressure, kPa; Liquid mixture 1 Temperature, K; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2	Titration method	26
POMD	6 7 9	Mass fraction - 6 ; Liquid mixture 1 Mass fraction - 9 ; Liquid mixture 2 Mass fraction - 6 ; Liquid mixture 2	Mass fraction - 9; Liquid mixture 1	Temperature, K; Liquid mixture 2 Pressure, kPa; Liquid mixture 2	Liquid mixture 1 Liquid mixture 2	Titration method Titration method Titration method	3
POMD	6 7 1	Mass fraction - 6 ; Liquid mixture 1	Mass fraction - 1; Liquid mixture 1	Pressure, kPa; Liquid mixture 1 Temperature, K; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2	Titration method	26
POMD	6 7 1	Mass fraction - 6 ; Liquid mixture 1 Mass fraction - 1 ; Liquid mixture 2 Mass fraction - 6 ; Liquid mixture 2	Mass fraction - 1; Liquid mixture 1	Temperature, K; Liquid mixture 2 Pressure, kPa; Liquid mixture 2	Liquid mixture 1 Liquid mixture 2	Titration method Titration method Titration method	3
POMD	6 7 2	Mass fraction - 6 ; Liquid mixture 1	Mass fraction - 2; Liquid mixture 1	Pressure, kPa; Liquid mixture 1 Temperature, K; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2	Titration method	26
POMD	6 7 2	Mass fraction - 6 ; Liquid mixture 1 Mass fraction - 2 ; Liquid mixture 2 Mass fraction - 6 ; Liquid mixture 2	Mass fraction - 2; Liquid mixture 1	Temperature, K; Liquid mixture 2 Pressure, kPa; Liquid mixture 2	Liquid mixture 1 Liquid mixture 2	Titration method Titration method Titration method	3
POMD	6 7 3	Mass fraction - 6 ; Liquid mixture 1	Mass fraction - 3; Liquid mixture 1	Pressure, kPa; Liquid mixture 1 Temperature, K; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2	Titration method	18
POMD	6 7 3	Mass fraction - 6 ; Liquid mixture 1 Mass fraction - 3 ; Liquid mixture 2 Mass fraction - 6 ; Liquid mixture 2	Mass fraction - 3; Liquid mixture 1	Temperature, K; Liquid mixture 2 Pressure, kPa; Liquid mixture 2	Liquid mixture 1 Liquid mixture 2	Titration method Titration method Titration method	3
POMD	6 7 4	Mass fraction - 6 ; Liquid mixture 1	Mass fraction - 4; Liquid mixture 1	Pressure, kPa; Liquid mixture 1 Temperature, K; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2	Titration method	38
POMD	6 7 4	Mass fraction - 6 ; Liquid mixture 1 Mass fraction - 4 ; Liquid mixture 2 Mass fraction - 6 ; Liquid mixture 2	Mass fraction - 4; Liquid mixture 1	Temperature, K; Liquid mixture 2 Pressure, kPa; Liquid mixture 2	Liquid mixture 1 Liquid mixture 2	Titration method Titration method Titration method	3
POMD	6 7 5	Mass fraction - 6 ; Liquid mixture 1	Mass fraction - 5; Liquid mixture 1	Pressure, kPa; Liquid mixture 1 Temperature, K; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2	Titration method	26
POMD	6 7 5	Mass fraction - 6 ; Liquid mixture 1 Mass fraction - 5 ; Liquid mixture 2 Mass fraction - 6 ; Liquid mixture 2	Mass fraction - 5; Liquid mixture 1	Temperature, K; Liquid mixture 2 Pressure, kPa; Liquid mixture 2	Liquid mixture 1 Liquid mixture 2	Titration method Titration method Titration method	3

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Sodium carbonate as phase promoter in aqueous solutions of imidazolium and pyridinium ionic liquids

Deive, F. J.[Francisco J.], Rivas, M. A.[Miguel A.], Rodriguez, A.[Ana]

ABSTRACT