Partitioning of Carboxylic Acid Between Oil and Water Phases. Experimental, Correlation and Prediction

ALEJANDRINA CAMPANELLA; BEATRIZ A. MANDAGARÁN; ENRIQUE A. CAMPANELLA

JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY (JAOCS)

Springer - AOCS

Año: 2009 vol. 86 p. 513 - 519

0003-021X

Partition coefficients for carboxylic acids (A), namely acetic and formic acids, between oil and water were measured, correlated and predicted. The experiments were conducted by equilibrating the systems, soybean oil (SO)-H2O-A and fatty acid methyl ester (FAME)-H2O-A, at 40 ºC employing different compositions. The partition coefficients were correlated using the UNIQUAC model and, also, predicted by calculating the activity coefficients of the carboxylic acid in the two phases using a  group contribution method, the UNIFAC equation. Agreement of experimental partition coefficients values with those estimated by UNIFAC are fair. Other experimental data from literature were also correlated and discussed.