ABSTRACT

In this work, solubility of salicylic acid (S.A.) in aqueous solutions was determined, associated with other compounds like salts. Isothermal and isobaric solid liquid equilibrium (SLE) data of five systems containing salicylic acid + water + salt (NaCl, KCl, NaBr, Na2SO4 and K2SO4) have been measured at 92.50 kPa and between 293.5 and 313.3 K by using an equilibrium still. The association of the acid in liquid phase has been considered, and its nonideality was accounted for using rational models. The experimental ternary data have been correlated by two equations or rational models. The predicted results of solubility for the systems studied over a range of temperatures indicated that both modified equations tested can fairly be used to predict solid-liquid equilibrium for aqueous solutions containing salts at temperatures studied.

Compounds

#	Formula	Name
1	C7H6O3	2-hydroxybenzoic acid
2	ClNa	sodium chloride
3	ClK	potassium chloride
4	BrNa	sodium bromide
5	K2O4S	potassium sulfate
6	H2O	water
7	Na2O4S	sodium sulfate

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 6	Molality, mol/kg ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	titration by NaOH	2
POMD	1 2 6	Molality, mol/kg - 1 ; Liquid	Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 2; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	titration by NaOH	9
POMD	1 3 6	Molality, mol/kg - 1 ; Liquid	Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 3; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	titration by NaOH	9
POMD	1 4 6	Molality, mol/kg - 1 ; Liquid	Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 4; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	titration by NaOH	9
POMD	1 6 5	Molality, mol/kg - 1 ; Liquid	Temperature, K; Liquid Solvent: Molality, mol/kg - 5; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	titration by NaOH	9
POMD	1 6 7	Molality, mol/kg - 1 ; Liquid	Temperature, K; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 7; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	titration by NaOH	9

Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Solubility of salicylic acid in water + salt (NaCl, KCl, NaBr, Na2SO4 and K2SO4) at 293.5 to 313.3 K

Pires, R. F.[Ricardo F.], Franco, Jr., M. R. ,. J.[Moilton R. , Jr.]

ABSTRACT