Solubility behavior of mixtures containing refined soybean oil and low-toxic solvents at different temperatures

Author(s)

Homrich, Perci O. B. ; Mariutti, Lilian R. B. ; Bragagnolo, Neura ; Ceriani, Roberta

• Document type: Journal article
• Source: Fluid Phase Equilibria; v. 442, p. 87-95, JUN 25 2017.
• Web of Science Citations: 4

Abstract

Solubility behavior of refined soybean oil (RSO) plus seventeen low toxic solvents was determined experimentally, and was predicted using five versions of the UNIFAC method. Qualitative results obtained by cloud point detection at a temperature T of 278.15 K showed that eleven systems were completely miscible, two formed stable emulsions, and four resulted in biphasic mixtures. Mutual solubility at different temperatures of pseudobinary partially miscible systems (RSO plus solvent) was measured either by the cloud point method or by direct tie line quantification: RSO plus anhydrous ethanol, or acetic acid, or ethyl lactate, or dimethyl sulfoxide (DMSO). Liquid-liquid equilibrium data were satisfactorily correlated by the NRTL and UNIQUAC models, which were also used for determining the upper critical solution temperatures (UCST) by liquid-liquid flash calculations. Further, the predictive capacity of five versions of the UNIFAC method was verified and comparisons among them were achieved. (C) 2017 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 14/21252-0 - Equilibrium and production processes of biofuels and bioproducts
• Grantee: Antonio José de Almeida Meirelles
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 13/12735-5 - Vapor liquid equilibria and liquid liquid equilibria in the oil/fat and biodiesel industries: experimental data, modelling and simulation
• Grantee: Roberta Ceriani
• Support Opportunities: Program for Research on Bioenergy (BIOEN) - Regular Program Grants