A kinetic study of the lipase-catalyzed ethanolysis of two short-chain triradylglycerols: Alkylglycerols vs. triacylglycerols

• Published in: Journal of Molecular Catalysis B: Enzymatic
• Main Authors: Vázquez, Luis Nuñez, Fernández, Óscar, Blanco, Rosa María, Señoráns Rodríguez, Francisco Javier, Reglero, Guillermo, Torres, Carlos F.
• Other Authors: UAM. Departamento de Química Física Aplicada
• Format: Article in Journal/Newspaper
• Language: English
• Published: Elsevier B.V 2014
• Subjects: Alkylglycerols; Butyric; Kinetics model; Candida antarctica; Ethanolysis; Lipase; Química; Antarc*; Antarctica
• Online Access: http://hdl.handle.net/10486/660725; https://doi.org/10.1016/j.molcatb.2010.02.010

This is the author’s version of a work that was accepted for publication in Journal of Molecular Catalysis B: Enzymatic. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Molecular Catalysis B: Enzymatic, 64, (2010) DOI 10.1016/j.molcatb.2010.02.010 Lipase-catalyzed ethanolysis of two short-chain triradylglycerols, namely tributyrin and 2,3-dibutyroil- 1-O-alkylglycerols, have been studied. Much faster rate of reaction for the ethanolysis of tributyrin than that of 2,3-dibutyroil-1-O-alkylglycerols was attained. A kinetic model for the rate of release of ethyl butyrate and for the inactivation of the lipase has been also studied. The parameter corresponding to the release of ethyl butyrate was one order of magnitude higher for ethanolysis of tributyrin than the corresponding of 2,3-dibutyroil-1-O-alkylglycerols. On the contrary, the stability of Novozym 435 during ethanolysis of 2,3-dibutyroil-1-O-alkylglycerols was higher than the corresponding of tributyrin. At the reaction conditions under study, both ethanolysis reactions take place with high selectivity and yield monoesterified alkylglycerols and sn-2 monobutyrin as the main acylglycerols in the reaction mixtures. This work was supported by the projects AGL2006-02031/ALI and AGL2008-05655 by Ministerio de Ciencia (Spain) and also by Comunidad Autonoma de Madrid (ALIBIRD, project number S-505/AGR-0153) and Consolider-Ingenio FUN-C-FOOD (CSD2007- 00063).