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Method for obtaining hydroxytyrosol extract, mixture of hydroxytyrosol and 3,4-dihydroxyphenylglycol extract, and hydroxytyrosyl acetate extract, from by-products of the olive tree, and the purification thereof

Authors: Fernández-Bolaños Guzmán, Juan; Rodríguez-Gutiérrez, Guillermo; Lama Muñoz, Antonio; Fernández-Bolaños Guzmán, José María; Maya, Inés; López López, Óscar; Marset Castro, Azucena;

Method for obtaining hydroxytyrosol extract, mixture of hydroxytyrosol and 3,4-dihydroxyphenylglycol extract, and hydroxytyrosyl acetate extract, from by-products of the olive tree, and the purification thereof

Abstract

[ES] Procedimiento para la obtencion de un extracto que comprende hidroxitirosol, bien como producto acetilado o como mezcla con 3,4 dihidroxifenilglicol y la purificación de todos ellos, que comprende al menos una cromatografía en columna de una fuente de hidroxitirosol como subproductos de la aceituna y del olivar, utilizando una mezcla de al menos dos resinas iónicas, preferentemente una resina aniónica con una resina catiónica. Preferentemente en una primera fase se obtiene una fuente líquida rica en fenoles como materia prima par ala extracción y purificación de compuestos fenólicos, una segunda fase permite obtener un extracto enriquecido en hidroxitirosol (HT), una mezcla hidroxitirosol con 3-4-dihidroxifenilglicol (DHFG) y se produce acetato de hidroxitirosilo, obteniendo en la tercera fase hidroxitirosol muy puro, el DHFG, su mezcla y acetato de HT. Cada fase comprende extracción, reacción, concentración, adsorción y desorción, utilizando mezclas de resinas de intercambio iónico, adsorción en resinas no iónicas y una fracción fenólica polimérica, membranas de ósmosis inversa y/o evaporadores.

[EN] The invention relates to a method for obtaining an extract comprising hydroxytyrosol, as an acetylated product or as a mixture with 3,4 dihydroxyphenylglycol and the purification thereof, comprising at least one column chromatography of a hydroxytyrosol source such as by-products of the olive and the olive tree, using a mixture of at least two ionic resins, preferably an anionic resin with a cationic resin. Preferably, in a first phase, a phenol-rich liquid is obtained as the raw material for the extraction and purification of phenolic compounds, a second phase enables a hydroxytyrosol (HT)-enriched extract and a hydroxytyrosol with 3-4-dihydroxyphenylglycol (DHFG) mixture to be obtained, and hydroxytyrosyl acetate is produced, and, in the third phase, highly pure hydroxytyrosol, DHFG, the mixture thereof and HT acetate are obtained. Each phase comprises extraction, reaction, concentration, adsorption and desorption, using mixtures of ion exchange resins, adsorption in non-ionic resins and a polymer phenolic fraction, membranes of reverse osmosis and evaporators.

Consejo Superior de Investigaciones Científicas (España), Universidad de Sevilla

A1 Solicitud de patente con informe sobre el estado de la técnica

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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