C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 51/48 (2006.01) C07C 62/32 (2006.01)
Patent
CA 2286801
A novel process for the production of the natural antioxidant, carnosic acid, by extracting it from rosemary leaves with an aqueous solution of a lower alkyl alcohol in the presence of a water soluble acid is described. The extraction of the carnosic acid is very selective, i.e. very few other chemicals such as pro-oxidants from the plant are extracted. Furthermore, a method for the stabilization of the extracted acid from decomposition and a method of preparing the acid in high concentration are described.
L'invention concerne un nouveau procédé qui permet de produire un antioxydant naturel, l'acide carnosique, en l'extrayant des feuilles de romarin au moyen d'une solution aqueuse d'un alkylalcool inférieur en présence d'un acide soluble dans l'eau. L'extraction de l'acide carnosique est très sélective, c'est-à-dire que très peu d'autres substances chimiques telles que des pro-oxydants sont extraites de la plante. L'invention concerne également un procédé permettant de stabiliser l'acide extrait afin de le protéger de la décomposition, ainsi qu'un procédé permettant de préparer ledit acide à des concentrations élevées.
Ben-Yosef Gil
Garbar Arkady
Lycored Natural Products Industries Ltd.
Smart & Biggar
LandOfFree
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