ABSTRACT

The (vapor + liquid), (liquid + liquid) and (vapor + liquid + liquid) equilibria of the ternary system (water + 1-butanol + p-xylene) have been determined. (Water + 1-butanol + p-xylene) is a type 2 heterogeneous ternary system with partially miscible (water + 1-butanol) and (water + p-xylene) pairs. By contrast, (1-butanol + p-xylene) is totally miscible under atmospheric conditions. This paper examines the (vapor + liquid) equilibrium in both heterogeneous and homogeneous regions at 101.3 kPa of pressure. (Liquid + liquid) equilibrium data at T = 313.15 K have also been determined, and for comparison, the obtained experimental data have been calculated by means of several thermodynamic models: UNIQUAC, UNIFAC and NRTL. Some discrepancies were found between the (vapor + liquid + liquid) correlations; however, the models reproduced the (liquid + liquid) equilibrium data well. The obtained data reveal a ternary heterogeneous azeotrope with mole fraction composition: 0.686 water, 0.146 1-butanol and 0.168 p-xylene.

Compounds

#	Formula	Name
1	H2O	water
2	C4H10O	butan-1-ol
3	C8H10	1,4-dimethylbenzene

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 1	Mole fraction - 2 ; Liquid mixture 1 Mole fraction - 2 ; Liquid mixture 2 Mole fraction - 1 ; Liquid mixture 2	Mole fraction - 1; Liquid mixture 1	Temperature, K; Liquid mixture 2 Pressure, kPa; Liquid mixture 2	Liquid mixture 1 Liquid mixture 2	Chromatography Chromatography Chromatography	11
POMD	2 3 1	Mole fraction - 2 ; Liquid Mole fraction - 2 ; Gas Mole fraction - 1 ; Gas	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Gas	Chromatography Chromatography Chromatography	54
POMD	2 3 1	Mole fraction - 1 ; Liquid mixture 2 Mole fraction - 2 ; Liquid mixture 2 Mole fraction - 1 ; Liquid mixture 1 Mole fraction - 2 ; Liquid mixture 1 Mole fraction - 2 ; Gas Mole fraction - 1 ; Gas	Temperature, K; Liquid mixture 1	Pressure, kPa; Liquid mixture 1	Liquid mixture 2 Liquid mixture 1 Gas	Chromatography Chromatography Chromatography Chromatography Chromatography Chromatography	21
POMD	2 1	Mole fraction - 2 ; Liquid mixture 2	Temperature, K; Liquid mixture 1	Pressure, kPa; Liquid mixture 1	Liquid mixture 2 Liquid mixture 1	Chromatography	2
POMD	2 1	Mole fraction - 2 ; Liquid mixture 1	Temperature, K; Liquid mixture 1	Pressure, kPa; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2	Chromatography	2
POMD	2 1	Boiling temperature at pressure P, K ; Liquid	Mole fraction - 2; Liquid	Pressure, kPa; Liquid	Liquid Gas	Ebulliometric method (Recirculating still)	2
POMD	2 1	Mole fraction - 2 ; Gas	Mole fraction - 2; Liquid	Pressure, kPa; Liquid	Gas Liquid	Chromatography	2
POMD	3 1	Mole fraction - 1 ; Liquid mixture 1	Temperature, K; Liquid mixture 1	Pressure, kPa; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2	Chromatography	2
POMD	3 1	Boiling temperature at pressure P, K ; Liquid	Pressure, kPa; Liquid Mole fraction - 1; Liquid		Liquid Gas	Ebulliometric method (Recirculating still)	1
POMD	3 1	Mole fraction - 1 ; Gas	Pressure, kPa; Liquid Mole fraction - 1; Liquid		Gas Liquid	Chromatography	1

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Isothermal (liquid + liquid) equilibrium data at T = 313.15 K and isobaric (vapor + liquid + liquid) equilibrium data at 101.3 kPa for the ternary system (water + 1-butanol + p-xylene)

Gomis, V.[Vicente], Font, A.[Alicia], Saquete, M. D.[Maria Dolores], Garcia-Cano, J.[Jorge]

ABSTRACT