ABSTRACT

This work reports the results of a study on the use of the two ionic liquids as an extraction solvent in the separation of the azeotropic mixture of hexane with ethyl acetate. Experimental densities, speeds of sound, and refractive indices of the binary mixtures of ethyl acetate + hexane or + 1-hexyl-3-methylimidazolium hexafluorophosphate (HMIM PF6) were determined from (293.15 to 303.15) K, since they are necessary to determine liquid-liquid equilibria. Excess molar volumes, changes of refractive index on mixing, and deviations in isentropic compressibility for the above systems were calculated. Liquid-liquid equilibria (LLE) were determined for the ternary systems hexane + ethyl acetate + HMIM PF6 or 1-octyl-3- methylimidazolium hexafluorophosphate (OMIM PF6) at 298.15 K and atmospheric pressure. The values of selectivity and distribution ratio were derived from the tie-line data. Experimental liquid-liquid equilibria data were correlated with the NRTL and UNIQUAC equations. These equations were verified to accurately correlate the experimental data.

Compounds

#	Formula	Name
1	C12H23F6N2P	1-octyl-3-methylimidazolium hexafluorophosphate
2	C6H14	hexane
3	C4H8O2	ethyl acetate
4	C10H19F6N2P	1-hexyl-3-methylimidazolium hexafluorophosphate

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	2 3	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Mole fraction - 2; Liquid	Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	39
POMD	2 3	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Mole fraction - 2; Liquid	Pressure, kPa; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	39
POMD	2 3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mole fraction - 2; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	39
POMD	3 4	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Mole fraction - 4; Liquid	Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	39
POMD	3 4	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Mole fraction - 4; Liquid	Pressure, kPa; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	39
POMD	3 4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mole fraction - 4; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	39
POMD	2 3 4	Mole fraction - 2 ; Liquid mixture 2 Mole fraction - 3 ; Liquid mixture 1 Mole fraction - 2 ; Liquid mixture 1	Mole fraction - 3; Liquid mixture 2	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 1	Liquid mixture 2 Liquid mixture 1	Density calibration data Density calibration data Density calibration data	13
POMD	2 3 1	Mole fraction - 2 ; Liquid mixture 2 Mole fraction - 3 ; Liquid mixture 1 Mole fraction - 2 ; Liquid mixture 1	Mole fraction - 3; Liquid mixture 2	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 1	Liquid mixture 2 Liquid mixture 1	Density calibration data Density calibration data Density calibration data	13

Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Phase Equilibria of the Azeotropic Mixture Hexane + Ethyl Acetate with Ionic Liquids at 298.15 K

Pereiro, A. B.[Ana B.], Rodriguez, A.[Ana]

ABSTRACT