ABSTRACT

Using a laser monitoring observation technique, solubilities of o-nitro-benzoic acid, p-hydro-benzoic acid, p-methyl-benzoic acid and m-methylbenzoic acid in water have been measured in the temperature range 290.15 323.15 K. The experimental data are regressed with theWilson equation and the eH equation. The experimental results show that solubilities of these compounds in the range of 10.4 10.5 mole fraction in water, increase significantly with temperature. Except for o-nitro-benzoic acid, the solubility data are described adequately with the Wilson equation. The eH equation gives good agreement with all experimental data. The results indicate that the molecular structure and interactions affect the solubilities significantly.

Compounds

#	Formula	Name
1	C7H5NO4	2-nitrobenzoic acid
2	H2O	water
3	C7H6O3	4-hydroxybenzoic acid
4	C8H8O2	4-methylbenzoic acid
5	C8H8O2	3-methylbenzoic acid
6	C7H6O2	benzoic acid
7	C7H5NO4	3-nitrobenzoic 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 2	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	laser monitoring observation technique	19
POMD	3 2	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 3; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 3	laser monitoring observation technique	16
POMD	4 2	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 4; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 4	laser monitoring observation technique	11
POMD	5 2	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 5; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 5	laser monitoring observation technique	19
POMD	6 2	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 6; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 6	laser monitoring observation technique	13
POMD	7 2	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 7; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 7	laser monitoring observation technique	16

Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

The effect of temperature on the solubility of benzoic acid derivatives in water

Qing-Zhu, J.[Jia], Pei-Sheng, M.[Ma], Huan, Z.[Zhou], Shu-Qian, X.[Xia], Qiang, W.[Wang], Yan, Q.[Qiao]

ABSTRACT