ABSTRACT

(Liquid + liquid) equilibrium (LLE) data for the ternary system (water + butyric acid + isoamyl alcohol) have been determined experimentally at T = (298.15, 308.15 and 318.15) K. Complete phase diagrams were obtained by determining solubility and the tieline data. Tie-line compositions were correlated by Othmer Tobias method. The UNIFAC method was used to predict the phase equilibrium in the system using the interaction parameters determined from experimental data between groups CH3, CH2 , CH, COOH, OH and H2O. It is found that UNIFAC group interaction parameters used for LLE could not provide a good prediction. Distribution coefficients and separation factors were evaluated for the immiscibility region.

Compounds

#	Formula	Name
1	H2O	water
2	C4H8O2	butanoic acid
3	C5H12O	3-methylbutan-1-ol

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	Normal boiling temperature, K ; Liquid			Liquid Gas	OTHER:UFactor:8:sMethod:Fisher boiling point apparatus	1
POMD	1	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Standard Abbe refractometry	1
POMD	1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	VIBTUB:UFactor:4	1
POMD	2	Normal boiling temperature, K ; Liquid			Liquid Gas	Fisher boiling point apparatus	1
POMD	2	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	3	Normal boiling temperature, K ; Liquid			Liquid Gas	Fisher boiling point apparatus	1
POMD	3	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	2 3 1	Mass fraction - 1 ; Liquid mixture 2 Mass fraction - 2 ; Liquid mixture 1 Mass fraction - 1 ; Liquid mixture 1	Temperature, K; Liquid mixture 1 Mass fraction - 2; Liquid mixture 2	Pressure, kPa; Liquid mixture 1	Liquid mixture 2 Liquid mixture 1	CHROM:UFactor:8 CHROM:UFactor:8 CHROM:UFactor:8	21

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

(Liquid + liquid) equilibria of (water + butyric acid + isoamyl alcohol) ternary system

Bilgin, M.[Mehmet], Kirbaslar, S. I., Ozcan, O.[Onder], Dramur, U.[Umur]

ABSTRACT