Method of obtaining a natural hydroxytyrosol-rich...

C - Chemistry – Metallurgy – 07 – C

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C07C 39/11 (2006.01) A23L 1/30 (2006.01) A61K 8/34 (2006.01) A61K 31/05 (2006.01) A61Q 19/02 (2006.01) C07C 37/00 (2006.01) C07C 37/68 (2006.01)

Patent

CA 2617002

The present invention relates to a process of obtaining a natural, bioactive concentrate, rich on hydroxytyrosol, from olive tree residues and subproducts using clean technologies. These technologies comprise supercritical fluid extraction, nanofiltration and reverse osmosis which are used individually or in an integrated mode. The natural extract comprises a minimum concentration of 15% (mass fraction) in hydroxytirosol and a maximum concentration of 98% (mass fraction) in this compound. The hydroxytyrosol-rich concentrate exhibits anti-oxidant, anti-microbial, anti-inflammatory and anti-carcinogenic activities, which are superior to the activities observed for isolated hydroxytyrosol in equivalent concentration. The hydroxytyrosol-rich concentrate can be prepared in the form of solid particles, as an aqueous solution, in an emulsion or as lipidic based nanoparticles. Industrial application comprises the food, pharmaceutical and cosmetics industries.

La présente invention concerne un procédé permettant d'obtenir un concentré bioactif naturel riche en hydroxytyrosol à partir de résidus et de sous-produits d'olivier utilisant des technologies propres. Ces technologies comprennent l'extraction de fluide supercritique, la nanofiltration et l'osmose inverse qui sont utilisées individuellement ou conjointement. L'extrait naturel comprend une concentration minimum de 15 % (fraction en masse) d'hydroxytyrosol et une concentration maximum de 98 % (fraction en masse) de ce composé. Le concentré riche en hydroxytyrosol présente des effets antioxydants, antimicrobiens, anti-inflammatoires et anticarcinogènes qui sont supérieurs aux effets observés de l'hydroxytyrosol isolé pour une concentration équivalente. Le concentré riche en hydroxytyrosol peut être préparé sous la forme de particules solides, sous la forme d'une solution aqueuse, dans une émulsion ou comme nanoparticules à base lipidique. Cette invention, à l'échelle industrielle, peut être appliquée dans les industries alimentaires, pharmaceutiques et cosmétiques.

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