ABSTRACT

Solubility and tie line data for the (water + butyric acid + n-heptane) and (water + butyric acid + toluene) ternary systems were determined at T = (298.2, 308.2, and 318.2) K and atmospheric pressure. Solubility data were obtained by the cloud-point titration method. The concentration of each phase was determined by acidimetric titration, the Karl-Fischer technique, and refractive index measurements. The experimental tie-line data were correlated using the UNIQUAC and NRTL thermodynamic models. The reliability of the experimental data was determined through the Othmer Tobias and Hand plots. Distribution coefficients and separation factors were evaluated for each system over the immiscibility regions.

Compounds

#	Formula	Name
1	C4H8O2	butanoic acid
2	C7H16	heptane
3	C7H8	toluene
4	H2O	water

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	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	Vibrating tube method	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	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	4	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	1 2 4	Mass fraction - 1 ; Liquid	Temperature, K; Liquid Mass fraction - 4; Liquid	Pressure, kPa; Liquid	Liquid Liquid - 1	Phase equilibration	87
POMD	1 2 4	Mass fraction - 4 ; Liquid mixture 2 Mass fraction - 1 ; Liquid mixture 1 Mass fraction - 4 ; Liquid mixture 1	Temperature, K; Liquid mixture 1 Mass fraction - 1; Liquid mixture 2	Pressure, kPa; Liquid mixture 1	Liquid mixture 2 Liquid mixture 1	Phase equilibration Phase equilibration Phase equilibration	18
POMD	1 3 4	Mass fraction - 1 ; Liquid	Temperature, K; Liquid Mass fraction - 4; Liquid	Pressure, kPa; Liquid	Liquid Liquid - 1	Phase equilibration	84
POMD	1 3 4	Mass fraction - 4 ; Liquid mixture 2 Mass fraction - 1 ; Liquid mixture 1 Mass fraction - 4 ; Liquid mixture 1	Temperature, K; Liquid mixture 1 Mass fraction - 1; Liquid mixture 2	Pressure, kPa; Liquid mixture 1	Liquid mixture 2 Liquid mixture 1	Phase equilibration Phase equilibration Phase equilibration	18

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

(Liquid + liquid) equilibria of aqueous solutions of butyric acid with n-heptane and toluene at T = (298.2, 308.2, and 318.2) K

Gilani, H. G., Gilani, A. G., Janbaz, M.

ABSTRACT