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US 5,912,363 AGranted
Method for extraction of proanthocyanidins from plant material
AssigneeInterhealth Nutraceuticals, Inc.
InventorsKarim Nafisi-Movaghar, Thomas T. Svanoe, William A. Seroy
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Abstract
A method for the extraction of proanthocyanidins from plant material is disclosed. The method involves heating an aqueous mixture of solid plant material, optionally under increased pressure and reduced oxygen; various separation, filtration and adsorption steps, and the elution of adsorbed proanthocyanidins with polar solvent. Optionally, the polar solvent can be reconstituted and recycled into the elution phase of the method, resulting in decreased solvent consumption.
Claims9
A method for the extraction of proanthocyanidins from plant material comprising:
- (a) providing an aqueous mixture of solid plant material containing proanthocyanidins;
- (b) heating the mixture to produce an aqueous solution containing extracted proanthocyanidins;
- (c) separating said aqueous solution from the residual solid material;
- (d) filtrating said aqueous solution to remove larger molecular weight polymers and particulates to produce a permeate containing extracted proanthocyanidins;
- (e) separating the extracted proanthocyanidins from the permeate solution by contacting the permeate with an adsorbent material which is capable of releasably retaining the extracted proanthocyanidins;
- (f) eluting the proanthocyanidins retained on said absorbent material with a polar solvent;
- and
- (g) concentrating the eluted proanthocyanidins to produce a concentrated proanthocyanidin extract and a second permeate liquid.
5 more elements
Dependencies are inferred from the claim text.