Process for isolating phenolic compounds

Details Process for isolating phenolic compounds Process for isolating phenolic compounds

A - Human Necessities

61

K

A61K 31/353 (2006.01) C07D 311/24 (2006.01) C07D 311/30 (2006.01) C07D 311/32 (2006.01) C07D 311/36 (2006.01) C07D 311/38 (2006.01)

Patent

CA 2454636

The invention provides compositions and methods for isolating phenolic compounds, particularly isoflavones, from aqueous extracts of plant materials that contain such compounds. The process comprising: (a) providing an aqueous plant extract at a first pH less than 10, the aqueous plant extract comprising a plurality of phenolic compounds; (b) extracting the aqueous plant extract with a first organic solvent to yield a first organic extract; (c) extracting the first organic extract with an aqueous phase of pH greater than 10 to yield a phenol rich aqueous phase; (d) adjusting the pH of the phenol rich aqueous phase to a pH of less than 9; and (e) isolating the phenolic compounds from the phenol rich aqueous phase.

L'invention concerne des compositions et des procédés permettant d'isoler les composés phénoliques, en particulier les isoflavones, à partir d'extraits aqueux de plantes qui les renferment. Le procédé comprend les étapes suivantes: (a) présentation d'un extrait de plante, à un premier pH inférieur à 10, cet extrait comprenant une pluralité de composés phénoliques; (b) extraction de l'extrait de plante aqueux avec un premier solvant organique, donnant un premier extrait organique; (c) extraction du premier extrait organique, avec une phase aqueuse au pH supérieur à 10, donnant une phase aqueuse riche en phénol; (d) ajustement du pH de cette phase pour faire descendre le pH en dessous de 9; et (e) isolation des composés phénoliques à partir de cette même phase.

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