Process for producing high 2-O-.alpha.-D-glucopyranosyl-L-ascorbic acid
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United States of America Patent
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Jun 10, 2003
Grant Date -
Dec 13, 2001
app pub date -
Jun 8, 2001
filing date -
Jun 8, 2000
priority date (Note) -
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Abstract
Disclosed is a process for producing a high .alpha.G-AA content product, which comprises the steps of: contacting a solution as a material solution, containing .alpha.G-AA, L-ascorbic acid, and a saccharide(s), with an anion exchange resin packed in a column to adsorb the .alpha.G-AA and L-ascorbic acid on the anion exchanger; washing the anion exchanger with water to remove the saccharide(s) therefrom; feeding to the 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-.alpha.-D-glucopyranosyl-L-ascorbic acid and a fraction rich in L-ascorbic acid; and collecting the former fraction.
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