Patent ID: 6576446
Filing Date: 2003-06-10
Classification: C07H

Abstract:
A process for producing 2-O-&agr;-D-glucopyranosyl-L-ascorbic-acid, content product, which comprises the steps of:contacting a solution containing 2-O-&agr;-D-glucopyranosyl-L-ascorbic acid, L-ascorbic acid, and at least one saccharide, with an anion exchange resin packed in a column to adsorb said 2-O-&agr;-D-glucopyranosyl-L-ascorbic acid and said L-ascorbic acid on said anion exchange resin; washing said anion exchange resin with water to remove said saccharide(s) from said anion exchange resin; feeding to said column an aqueous solution, as an eluent, of an acid and/or a salt with a concentration of less than 0.5 N to fractionate a fraction rich in 2-O-&agr;-D-glucopyranosyl-L-ascorbic acid and a fraction rich in L-ascorbic acid; and collecting said fraction rich in 2-O-&agr;-D-glucopyranosyl-L-ascorbic acid.