ABSTRACT

(Liquid + liquid) equilibrium (LLE) data for the {water + carboxylic acid + dibasic esters mixture (dimethyladipate + dimethyl glutarate)} system were determined experimentally at T = 298.2 K for each acid. In this work, we studied formic acid, acetic acid and propionic acid. All the phase diagrams were obtained by determining solubility curve and tie-line data. The reliability of the experimental tie-line data was confirmed by using the Othmer Tobias correlation. The UNIFAC and modified UNIFAC models were used to predict the phase equilibrium in the system determined from experimental data using the interaction parameters between CH2, CH3, HCOOH, COOH, CH3COO, and H2O functional groups. Distribution coefficients and separation factors were evaluated for the immiscibility region.

Compounds

#	Formula	Name
1	CH2O2	formic acid
2	C2H4O2	acetic acid
3	C3H6O2	propanoic acid
4	H2O	water
5	C8H14O4	dimethyl 1,6-hexanedioate
6	C7H12O4	dimethyl pentanedioate

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	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	1	Boiling temperature at pressure P, K ; Liquid	Pressure, kPa; Liquid	Liquid Gas	Distillation	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	2	Boiling temperature at pressure P, K ; Liquid	Pressure, kPa; Liquid	Liquid Gas	Distillation	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	3	Boiling temperature at pressure P, K ; Liquid	Pressure, kPa; Liquid	Liquid Gas	Distillation	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	4	Boiling temperature at pressure P, K ; Liquid	Pressure, kPa; Liquid	Liquid Gas	Distillation	1
POMD	5 6	Mass density, kg/m3 ; Liquid	Mass fraction - 5; Liquid Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Vibrating tube method	1
POMD	5 6	Refractive index (Na D-line) ; Liquid	Mass fraction - 5; Liquid Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	1
POMD	5 6	Boiling temperature at pressure P, K ; Liquid	Mass fraction - 5; Liquid Pressure, kPa; Liquid	Liquid Gas	Closed cell (Static) method	1

Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

(Liquid + liquid) equilibria of the (water + carboxylic acid + dibasic esters mixture (DBE-2)) ternary systems

Ince, E.[Erol], Asci, Y. S.[Yavuz Selim]

ABSTRACT