Patent ID: 6635758
Filing Date: 2003-10-21
Classification: C07H

Abstract:
A process of extracting glycosides from a plant, comprising the steps of:(a) grinding the plant and mixing with water to form an extractive solution; (b) adding about 5 wt %Ëœ30 wt % of salt and about 5 wt %Ëœ30 wt % of a polyol comprising a copolymer of ethylene oxide and propylene oxide, to the extractive solution and then mixing thoroughly to form an aqueous layer and a polyol layer of the copolymer of ethylene oxide and propylene oxide; (c) removing the aqueous layer and concentrating the aqueous layer to be a solid; (d) washing the solid with a solvent, and producing a filtrate and collecting the filtrate after filtration; and (e) concentrating the filtrate to obtain a final product rich in glycosides.