ABSTRACT

The solubility of stearic acid was measured in ethanol, 2-propanol, heptane, hexane, acetone, and trichloroethylene and in the azeotropic mixtures of the solvents (ethanol-heptane; hexane-ethanol; ethanol-trichloroethylene; acetone-heptane; heptane-2-propanol; acetone-hexane; hexane-2-propanol; 2-propanol-trichloroethylene), by the phase disappearance method, from (290 to 325) K. The stearic acid-pure solvent experimental data were correlated with the Van Laar, Wilson, NRTL, and UNIQUAC equations and the solubility of stearic acid in azeotropic mixtures with the NIBS/Redlich-Kister equation. The UNIFAC solubility prediction improved when the correction for the existence of stearic acid dimers was applied except for systems with trichloroethylene and 2-propanol. The solubility of stearic acid increased in azeotropic mixtures regarding pure solvents except for the heptane-acetone and hexane-acetone mixtures.

Compounds

#	Formula	Name
1	C18H36O2	octadecanoic acid
2	C3H6O	acetone
3	C2H6O	ethanol
4	C7H16	heptane
5	C6H14	hexane
6	C3H8O	propan-2-ol
7	C2HCl3	trichloroethene

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	VISOBS	13
POMD	1 3	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	VISOBS	13
POMD	1 4	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	VISOBS	13
POMD	1 5	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	VISOBS	13
POMD	1 6	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	VISOBS	13
POMD	1 7	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	VISOBS	12
POMD	1 3 4	Mole fraction - 1 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Solvent: Mole fraction - 3; Liquid	Liquid Crystal - 1	visual observation	12
POMD	1 3 5	Mole fraction - 1 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Solvent: Mole fraction - 5; Liquid	Liquid Crystal - 1	visual observation	12
POMD	1 3 7	Mole fraction - 1 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Solvent: Mole fraction - 3; Liquid	Liquid Crystal - 1	visual observation	12
POMD	1 2 4	Mole fraction - 1 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Solvent: Mole fraction - 2; Liquid	Liquid Crystal - 1	visual observation	12
POMD	1 6 4	Mole fraction - 1 ; Liquid	Temperature, K; Liquid	Solvent: Mole fraction - 4; Liquid Pressure, kPa; Liquid	Liquid Crystal - 1	visual observation	12
POMD	1 2 5	Mole fraction - 1 ; Liquid	Temperature, K; Liquid	Solvent: Mole fraction - 2; Liquid Pressure, kPa; Liquid	Liquid Crystal - 1	visual observation	12
POMD	1 6 5	Mole fraction - 1 ; Liquid	Temperature, K; Liquid	Solvent: Mole fraction - 5; Liquid Pressure, kPa; Liquid	Liquid Crystal - 1	visual observation	12
POMD	1 6 7	Mole fraction - 1 ; Liquid	Temperature, K; Liquid	Solvent: Mole fraction - 6; Liquid Pressure, kPa; Liquid	Liquid Crystal - 1	visual observation	11

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

Solubilities of Stearic Acid in Organic Solvents and in Azeotropic Solvent Mixtures

Calvo, B.[Beatriz], Cepeda, E. A.[Emilio A.]

ABSTRACT