US EPA

3546061 

Journal Article 

Solubilities of stearic acid in organic solvents and in azeotropic solvent mixtures 

Calvo, B; Cepeda, EA 

2008 

Yes 

Journal of Chemical and Engineering Data
ISSN: 0021-9568
EISSN: 1520-5134 

AMER CHEMICAL SOC 

WASHINGTON 

53 

3 

628-633 

English 

10.1021/je7006567 

WOS:000254008900003 

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.