Patent ID: 6576275
Filing Date: 2003-06-10
Classification: A23G,A23L,A61K,A61Q,C07D

Abstract:
A process for isolating polyphenolic antioxidants from purine containing plant material, comprising:(a) extracting the plant material with a hydroxylic extracting liquid at a temperature below 50Â° C., wherein the hydroxylic extracting liquid comprises water and/or a lower alcohol; (b) selectively adsorbing the extract obtained in step (a) on a solid adsorbent which has a polyphenol to purine adsorption selectivity ratio of at least 5 to 1, respectively; (c) desorbing adsorbed material obtained in step (b) with a hydroxylic desorbing liquid at a temperature between 50 and 110Â° C., thereby isolating the polyphenolic antioxidants.