Liquid-liquid equilibria for systems composed of refined soybean oil, free fatty acids, ethanol, and water at different temperatures

Author(s)

Chiyoda, Cristina ^[1] ; Peixoto, Elaine C. D. ^[2] ; Meirelles, Antonio J. A. ^[2] ; Rodrigues, Christianne E. C. ^[1]

Affiliation

^[1] Univ Sao Paulo, LES, Dept Food Engn ZEA FZEA, Pirassununga, SP - Brazil

^[2] Univ Estadual Campinas, EXTRAE, Dept Food Engn DEA FEA, Campinas, SP - Brazil

• Document type: Journal article
• Source: Fluid Phase Equilibria; v. 299, n. 1, p. 141-147, DEC 15 2010.
• Web of Science Citations: 19

Abstract

Soybean oil can be deacidified by liquid-liquid extraction with ethanol. In the present paper, the liquid-liquid equilibria of systems composed of refined soybean oil, commercial linoleic acid, ethanol and water were investigated at 298.2 K. The experimental data set obtained from the present study (at 298.2 K) and the results of Mohsen-Nia et al. {[}1] (at 303.2 K) and Rodrigues et al. {[}2] (at 323.2 K) were correlated by applying the non-random two liquid (NRTL) model. The results of the present study indicated that the mutual solubility of the compounds decreased with an increase in the water content of the solvent and a decrease in the temperature of the solution. Among variables, the water content of the solvent had the strongest effect on the solubility of the components. The maximum deviation and average variance between the experimental and calculated compositions were 1.60% and 0.89%, indicating that the model could accurately predict the behavior of the compounds at different temperatures and degrees of hydration. (C) 2010 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 06/00565-4 - Alcoholic extraction of vegetable oils: study of the solid-liquid equilibrium and the stage of the recovery of the solvent
• Grantee: Christianne Elisabete da Costa Rodrigues
• Support Opportunities: Regular Research Grants
• FAPESP's process: 08/07326-0 - Deterpenation of lemon and bergamot peel oils: Experimental Data and Modeling of Liquid-liquid Equilibria
• Grantee: Cristina Chiyoda Koshima
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 09/17855-3 - Solid-liquid equilibrium, kinetic of minor compounds extraction, and design of extractors in the vegetable oils extraction with ethanol
• Grantee: Christianne Elisabete da Costa Rodrigues
• Support Opportunities: Regular Research Grants
• FAPESP's process: 05/53095-2 - Phase equilibrium and separation processes of fatty and aqueous food solutions
• Grantee: Antonio José de Almeida Meirelles
• Support Opportunities: Research Projects - Thematic Grants