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Enzymatic Interesterification of Extra Virgin Olive Oil with a Fully Hydrogenated Fat: Characterization of the Reaction and Its Products

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Journal of the American Oil Chemists' Society

Abstract

The lipase-catalyzed interesterification of extra virgin olive oil (EVOO) and fully hydrogenated palm oil (FHPO) was studied in a batch reactor operating at 75 °C. The compositions of the semi-solid fat products depend on the reaction conditions and the initial ratio of EVOO to FHPO. The dependence of the quasi-equilibrium product TAG profile on the reaction time was determined for initial weight ratios of EVOO to FHPO from 80:20 to 20:80. Lipozyme TL IM, Lipozyme RM IM and Novozym 435 were employed as biocatalysts. The interesterification reaction was optimized with respect to the type and loading of biocatalyst. Equilibrium was approached in the shortest time with Novozym 435 (80% conversion in 4 h). The chemical, physical, and functional properties of the products were characterized. Appropriate choices of the reaction conditions and the initial ratio of EVOO to FHPO lead to TAG with melting profiles and solid fat contents similar to those of commercial products. Differences were observed in the solid fat contents, melting profiles, and oxidative stabilities of the various interesterified products and also between the indicated properties of each category of product and the corresponding physical blend of the precursor reagents.

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Acknowledgments

This work was supported by the Spanish fCICYT (Project number AGL2003-08157-C02-01 and MAT2007-6662-C02-02). We very much appreciate the technical help of R. Sedano and R. De Frutos of the Spanish Servicio Interdepartamental de Investigación (SIDI) of Universidad Autonoma de Madrid in Spain. We thank Andrea Cisneros (Food Science Department, UW-Madison) for carrying out the DSC scans and Juan Romero (Center for Dairy Research, UW-Madison) for the SFC measurements.

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Correspondence to Cristina Otero.

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Criado, M., Hernández-Martín, E., López-Hernández, A. et al. Enzymatic Interesterification of Extra Virgin Olive Oil with a Fully Hydrogenated Fat: Characterization of the Reaction and Its Products. J Amer Oil Chem Soc 84, 717–726 (2007). https://doi.org/10.1007/s11746-007-1104-y

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  • DOI: https://doi.org/10.1007/s11746-007-1104-y

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