ABSTRACT

Liquid liquid equilibrium data for the system consisting of toluene, n-heptane, and monocationic and dicationic ionic liquids were obtained at 303.15 K and atmospheric pressure. Monocationic ionic liquids 1-butyl-3-methylimidazolium hydrogen sulphate ([BMIM][HSO4]) and 3-methylimidazolium hydrogen sulphate ([HMIM][HSO4]) were used. Dicationic ionic liquids bis-(3-methyl-1-imidazole)-propylene hydrogen sulphate ([C3(MIM)2][(HSO4)2]) and bis-(3-methyl-1-imidazole)-hexylene hydrogen sulphate ([C6(MIM)2][(HSO4)2]) were used. The values of the partition coefficient and the selectivity were evaluated. The experimental data obtained were correlated using the non random two liquid (NRTL) model. The relatively high value of selectivity, in comparison with the conventional solvent sulpholane, suggests that the studied monocationic and dicationic ionic liquids can be used as alternative solvents for the separation of aromatics from aliphatics.

Compounds

#	Formula	Name
1	C7H8	toluene
2	C7H16	heptane
3	C4H8N2O4S	1-methylimidazolium hydrogen sulfate
4	C8H16N2O4S	1-butyl-3-methylimidazolium hydrogen sulfate
5	C11H24N4O8S2	1H-Imidazolium, 3,3'-(1,3-propanediyl)bis[4,5-dihydro-1-methyl-, sulfate (1:2)
6	C14H26N4O8S2	1H-imidazolium, 3,3'-(1,6-hexanediyl)bis[1-methyl-, sulfate (1:2)

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	Constraint	Phase	Method	#Points
POMD	1 2 3	Mole fraction - 1 ; Liquid mixture 2 Mole fraction - 2 ; Liquid mixture 2 Mole fraction - 1 ; Liquid mixture 1 Mole fraction - 2 ; Liquid mixture 1	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid mixture 2 Liquid mixture 1 Liquid	Chromatography Chromatography Chromatography Chromatography	12
POMD	1 2 4	Mole fraction - 1 ; Liquid mixture 2 Mole fraction - 2 ; Liquid mixture 2 Mole fraction - 1 ; Liquid mixture 1 Mole fraction - 2 ; Liquid mixture 1	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid mixture 2 Liquid mixture 1 Liquid	Chromatography Chromatography Chromatography Chromatography	12
POMD	1 2 5	Mole fraction - 1 ; Liquid mixture 2 Mole fraction - 2 ; Liquid mixture 2 Mole fraction - 1 ; Liquid mixture 1 Mole fraction - 2 ; Liquid mixture 1	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid mixture 2 Liquid mixture 1 Liquid	Chromatography Chromatography Chromatography Chromatography	12
POMD	1 2 6	Mole fraction - 1 ; Liquid mixture 2 Mole fraction - 2 ; Liquid mixture 2 Mole fraction - 1 ; Liquid mixture 1 Mole fraction - 2 ; Liquid mixture 1	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid mixture 2 Liquid mixture 1 Liquid	Chromatography Chromatography Chromatography Chromatography	12

Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Separation of toluene from n-heptane using monocationic and dicationic ionic liquids

Dukhande, V. A.[Vibhuti A.], Choksi, T. S.[Tej S.], Sabnis, S. U.[Sanket U.], Patwardhan, A. W.[Ashwin W.], Patwardhan, A. V.[Anand V.]

ABSTRACT