ABSTRACT

Solid-liquid equilibria for three organic binary mixtures of benzoic acid (1) + heptanedioic acid (2) (eutectic temperature TE = 350.20 K, eutectic composition x1E=0.498), benzoic acid (1) + 3-methylpentanedioic acid (3) (TE = 340.03 K, x1E = 0.427), and benzoic acid (1) + 2,3-dimethylbutanedioic acid (4) (TE = 352.71 K, x1E = 0.462) were measured using differential scanning calorimetry (DSC). We observe simple eutectic behaviors for all three binary mixtures. The experimental results were further correlated using the Wilson and non-random two-liquid (NRTL) activity coefficient models. The optimally fitted binary interaction parameters are reported and satisfactory correlation results are depicted.

Compounds

#	Formula	Name
1	C7H6O2	benzoic acid
2	C7H12O4	1,7-heptanedioic acid
3	C6H10O4	3-methylpentanedioic acid
4	C6H10O4	2,3-dimethyl-1,4-butanedioic acid

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	Molar enthalpy of transition or fusion, kJ/mol ; Crystal			Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	1	Normal melting temperature, K ; Crystal			Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	2	Molar enthalpy of transition or fusion, kJ/mol ; Crystal			Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	2	Normal melting temperature, K ; Crystal			Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	3	Molar enthalpy of transition or fusion, kJ/mol ; Crystal			Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	3	Normal melting temperature, K ; Crystal			Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	4	Molar enthalpy of transition or fusion, kJ/mol ; Crystal			Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	4	Normal melting temperature, K ; Crystal			Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	1 2	Eutectic temperature, K ; Crystal - 1			Crystal - 1 Crystal - 2 Liquid Air at 1 atmosphere	DTA	1
POMD	1 2	Eutectic composition: mole fraction - 1 ; Crystal - 1			Crystal - 1 Crystal - 2 Liquid Air at 1 atmosphere	Derived from phase diagram analysis	1
POMD	1 2	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 2	DTA:UFactor:4	10
POMD	1 2	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	DTA:UFactor:4	9
POMD	1 3	Eutectic temperature, K ; Crystal - 1			Crystal - 1 Crystal - 3 Liquid Air at 1 atmosphere	DTA	1
POMD	1 3	Eutectic composition: mole fraction - 1 ; Crystal - 1			Crystal - 1 Crystal - 3 Liquid Air at 1 atmosphere	Derived from phase diagram analysis	1
POMD	1 3	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 3	DTA:UFactor:4	7
POMD	1 3	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	DTA:UFactor:4	12
POMD	1 4	Eutectic temperature, K ; Crystal - 1			Crystal - 1 Crystal - 4 Liquid Air at 1 atmosphere	DTA	1
POMD	1 4	Eutectic composition: mole fraction - 1 ; Crystal - 1			Crystal - 1 Crystal - 4 Liquid Air at 1 atmosphere	Derived from phase diagram analysis	1
POMD	1 4	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 4	DTA:UFactor:4	8
POMD	1 4	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	DTA:UFactor:4	10

Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Solid-Liquid Equilibria for Three Binary Mixtures of Benzoic acid with Heptanedioic acid, 3-mthylpentanedioic acid, and 2,3-dimethylbutanedioic aci

Wang, T.-C.[Tzu-Chi], Deng, K.-C.[Kai-Chung]

ABSTRACT