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In search of sustainable alternatives for vegetable oils deacidification using oligomeric ionic liquid approach

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Author(s):
Ferreira, Marcela C. ; Toledo Hijo, Ariel A. C. ; Farias, Fabiane O. ; Batista, Eduardo A. C. ; Maximo, Guilherme J. ; Meirelles, Antonio J. A.
Total Authors: 6
Document type: Journal article
Source: Fluid Phase Equilibria; v. 555, p. 8-pg., 2022-04-01.
Abstract

Crude vegetable oils contain free fatty acids (FFAs) that can compromise the sensorial quality and oxidation stability, and thus, need to be removed by deacidification processes. However, conventional physical and chemical processes are related to neutral oil and nutraceutical loss, need of catalysts, and high energy consumption. The liquid-liquid extraction of these bioproducts using sustainable solvents, such as ionic liquids (ILs), seems to be interesting alternative over processes using bioethanol and organic solvents. In this work, the use of protic FA-based IL, such as diethanolammonium caprate ([H(2)EA][C10OO]) as solvent for deacidification of vegetable oils through the oligomeric IL approach was investigated. The liquid-liquid equilibria (LLE) data of systems containing [H(2)EA][C10OO], FA (palmitic, oleic and linoleic acids) and vegetable oil (palm olein, canola or soybean oils) were determined and modelled using NRTL model. IL presented good extraction efficiency of FFAs, presenting high distribution coefficient. Also, the NRTL model well described the LLE of such kind of systems. Moreover, solute-solvent affinity was evaluated by predictive COSMO model for a better comprehension of the results. Therefore, the results might indicate that protic FA-based ILs might have potential applicability as alternative solvents for deacidification of crude vegetable oils. (C) 2021 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 21/04178-5 - Use of ethanol associated with ionic liquids in the refining of vegetable oils, and in the production and modification of the physical properties of biodiesel
Grantee:Fabiane Oliveira Farias
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 16/08566-1 - Phase equilibrium thermodynamics for the improvement of physical properties of food bioproducts and their prediction in industrial and digestive processes
Grantee:Guilherme José Maximo
Support Opportunities: Regular Research Grants
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: 17/21607-1 - Use of ethanol associated with ionic liquids in vegetable oils refining and biodiesel physical properties production and modification
Grantee:Marcela Cravo Ferreira
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 19/18608-1 - Development and application of ionic liquids derived from bioactive and natural compounds as functional additives and nutraceuticals for the food industry
Grantee:Ariel Antonio Campos Toledo Hijo
Support Opportunities: Scholarships in Brazil - Post-Doctoral