ABSTRACT

Ternary equilibrium data for the mixtures of {water + phosphoric acid + organic solvent (cyclohexane, methylcyclohexane, and toluene)} were determined at T = (308.2 and 318.2) K and atmospheric pressure. Solubility data were determined by the cloud-point titration method. In order to obtain the tie-line data, 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 models. The reliability of the experimental data was determined through the Othmer-Tobias and Hand plots. Distribution coefficients and separation factors were evaluated over the immiscibility regions. The Katritzky LSER model was applied to correlate distribution coefficients and separation factors in these ternary systems.

Compounds

#	Formula	Name
1	H3O4P	phosphoric acid
2	C6H12	cyclohexane
3	C7H14	methylcyclohexane
4	C7H8	toluene
5	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	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	2	Relative permittivity at zero frequency ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Parallel plate capacitor	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	3	Relative permittivity at zero frequency ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Parallel plate capacitor	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	4	Relative permittivity at zero frequency ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Parallel plate capacitor	1
POMD	5	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Standard Abbe refractometry	1
POMD	5	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	2 5	Mass fraction - 5 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Liquid - 2	Titration method	2
POMD	3 5	Mass fraction - 5 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid Liquid - 3	Titration method	1
POMD	4 5	Mass fraction - 5 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid Liquid - 4	Titration method	1
POMD	2 1 5	Mass fraction - 1 ; Liquid	Temperature, K; Liquid Mass fraction - 5; Liquid	Pressure, kPa; Liquid	Liquid Liquid - 2	Titration method	32
POMD	2 1 5	Mass fraction - 2 ; Liquid mixture 1 Mass fraction - 5 ; Liquid mixture 2 Mass fraction - 1 ; Liquid mixture 2	Temperature, K; Liquid mixture 1 Mass fraction - 1; Liquid mixture 1	Pressure, kPa; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2	Index of refraction calibration data Index of refraction calibration data Index of refraction calibration data	10
POMD	3 1 5	Mass fraction - 1 ; Liquid	Temperature, K; Liquid Mass fraction - 5; Liquid	Pressure, kPa; Liquid	Liquid Liquid - 3	Titration method	32
POMD	3 1 5	Mass fraction - 3 ; Liquid mixture 1 Mass fraction - 5 ; Liquid mixture 2 Mass fraction - 1 ; Liquid mixture 2	Temperature, K; Liquid mixture 1 Mass fraction - 1; Liquid mixture 1	Pressure, kPa; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2	Index of refraction calibration data Index of refraction calibration data Index of refraction calibration data	10
POMD	4 1 5	Mass fraction - 1 ; Liquid	Temperature, K; Liquid Mass fraction - 5; Liquid	Pressure, kPa; Liquid	Liquid Liquid - 4	Titration method	32
POMD	4 1 5	Mass fraction - 4 ; Liquid mixture 1 Mass fraction - 5 ; Liquid mixture 2 Mass fraction - 1 ; Liquid mixture 2	Temperature, K; Liquid mixture 1 Mass fraction - 1; Liquid mixture 1	Pressure, kPa; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2	Index of refraction calibration data Index of refraction calibration data Index of refraction calibration data	11

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

(Liquid + liquid) equilibrium data of (water + phosphoric acid + solvents) systems at T = (308.2 and 318.2) K

Gilani, H. G., Gilani, A. G., Shekarsaraee, S., Uslu, H.

ABSTRACT