ABSTRACT

Liquid-liquid extraction is the most common method for separation of aromatics from their mixtures with n-alkanes hydrocarbons. An ionic liquid (IL), 4-methyl-N-butylpyridinium tetrafluoroborate [(mebupy)(BF4)], was evaluated as solvent for this separation. Liquid equilibria (LLE) for 2 ternary systems comprising tetradecane, or hexadecane + propylbenzene + [(mebupy)(BF4)] were measured over a temperature range of 313 333 K and atmospheric pressure. The reliability of the experimental data was evaluated using the Othmer-Tobias correlation. The effect of temperature, n-alkane chain length and solvent to feed ratio upon solubility, selectivity, and distribution coefficient were investigated experimentally. In addition, the experimental results were regressed to estimate the interaction parameters between each of the 3 pairs of components for the UNIQUAC and the NRTL models as a function of temperature. Both models satisfactorily correlate the experimental data, however the UNIQUAC fit was slightly better than that obtained with the NRTL model.

Compounds

#	Formula	Name
1	C9H12	propylbenzene
2	C14H30	tetradecane
3	C16H34	hexadecane
4	C10H16BF4N	1-butyl-4-methylpyridinium tetrafluoroborate

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 4	Mole fraction - 1 ; Liquid mixture 2 Mole fraction - 1 ; Liquid mixture 1 Mole fraction - 2 ; Liquid mixture 2 Mole fraction - 2 ; Liquid mixture 1	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid mixture 2 Liquid mixture 1 Liquid	Chromatography Chromatography Chromatography Chromatography	30
POMD	1 3 4	Mole fraction - 1 ; Liquid mixture 2 Mole fraction - 1 ; Liquid mixture 1 Mole fraction - 3 ; Liquid mixture 2 Mole fraction - 3 ; Liquid mixture 1	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid mixture 2 Liquid mixture 1 Liquid	Chromatography Chromatography Chromatography Chromatography	30

Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Separation of propylbenzene and n-alkanes from their mixtures using 4-methyl-N-butylpyridinium tetrafluoroborate as an ionic solvent at several temperatures

Alkhaldi, K. H. A. E.[Khalid H. A. E.], Al-Tuwaim, M. S.[Mohammad S.], Fandary, M. S.[Mohamed S.], Al-Jimaz, A. S.[Adel S.]

ABSTRACT