ABSTRACT

Isothermal vapor liquid equilibria for the ternary system {ethyl tert-butyl ether (ETBE) + ethanol + trihexyltetradecylphosphonium chloride ([P666,14][Cl]) or trihexyltetradecylphosphonium bis(2,2,4-trimethylpentyl)phosphinate ([P666,14][TMPP])} have been determined at 313.15 K using headspace gas chromatography (HSGC). The addition of a small amount of ionic liquids (ILs) to the system ETBE + ethanol produced an important salting-out effect. The azeotrope disappeared by varying the mole fraction of ILs from 0.05 to 0.10. The experimental VLE data were correlated using the Wilson equation. In addition, excess molar volumes (VE) and deviations in molar refractivity ((R) data at 298.15 K are reported for the binary systems {ETBE + [P666,14][Cl]}, {ETBE + [P666,14][TMPP]} and {ethanol + [P666,14][TMPP]} by a digital vibrating tube densimeter and a precision digital refractometer. The VE and (R were well correlated according to the Redlich Kister equation.

Compounds

#	Formula	Name
1	C6H14O	2-ethoxy-2-methylpropane
2	C2H6O	ethanol
3	C32H68ClP	trihexyl(tetradecyl)phosphonium chloride
4	C48H102O2P2	trihexyltetradecylphosphonium bis(2,4,4-trimethylpentyl)phosphinate

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	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	1	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Standard Abbe refractometry	1
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	2	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Standard Abbe refractometry	1
POMD	3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	3	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Standard Abbe refractometry	1
POMD	4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	4	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Standard Abbe refractometry	1
POMD	2 1 3	Mole fraction - 3 ; Liquid Mole fraction - 2 ; Gas Mole fraction - 1 ; Gas	Pressure, kPa; Liquid Mole fraction - 1; Liquid	Temperature, K; Liquid	Liquid Gas	Chromatography Chromatography Chromatography	42
POMD	2 1 4	Mole fraction - 4 ; Liquid Mole fraction - 2 ; Gas Mole fraction - 1 ; Gas	Pressure, kPa; Liquid Mole fraction - 1; Liquid	Temperature, K; Liquid	Liquid Gas	Chromatography Chromatography Chromatography	41
POMD	1 3	Mass density, kg/m3 ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	11
POMD	1 3	Refractive index (Na D-line) ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Standard Abbe refractometry	11
POMD	1 4	Mass density, kg/m3 ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	11
POMD	1 4	Refractive index (Na D-line) ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Standard Abbe refractometry	11
POMD	2 4	Mass density, kg/m3 ; Liquid	Mole fraction - 2; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	11
POMD	2 4	Refractive index (Na D-line) ; Liquid	Mole fraction - 2; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Standard Abbe refractometry	11

Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Azeotrope breaking for the system ethyl tert-butyl ether (ETBE) + ethanol at 313.15 K and excess properties at 298.15 K for mixtures of ETBE and ethanol with phosphonium-based ionic liquids

Hwang, I.-C.[In-Chan], Kwon, R.-H.[Rak-Hyun], Park, S.-J.[So-Jin]

ABSTRACT