Process for producing ascorbic acid derivative
AssigneeWako Pure Chemical Industries, Ltd.
InventorsAtsunori Sano, Kuniaki Okamoto, Jun Ebashi
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Abstract
Metal salts or substitutted or non-substituted ammonium salts of ascorbic acid derivatives can be produced in high yield by treating an acidic aqueous solution containing ascorbic acid-2-phosphate or ascorbic acid-2-sulfate with a porous adsorbent such as activated carbon, followed by treating the adsorbent with a basic aqueous solution containing e.g. a metal salt of an organic acid or substituted or non-substituted ammonium salt ion to elute the desired salt of ascorbic acid derivative.
Claims12
A process for producing a metal salt or substituted ammonium salt of ascorbic acid-2-phosphate, which comprises
- treating an acidic aqueous solution containing ascorbic acid-2-phosphate with a porous adsorbent to adsorb said ascorbic acid-2-phosphate,
- treating the adsorbent with a basic aqueous solution of an alkali metal, alkaline earth metal, aluminum or zinc salt of an organic acid, or substituted ammonium ions selected from the group consisting of cycloalkylammonium ions and cyclic ammonium ions to elute the corresponding metal salt or substituted ammonium salt of ascorbic acid-2-phosphate, and
- isolating said metal salt or substituted ammonium salt of ascorbic acid-2-phosphate.
A process for producing a metal salt or substituted ammonium salt of ascorbic acid-2-sulfate, which comprises
- treating an acidic aqueous solution containing ascorbic acid-2-sulfate with a porous adsorbent to adsorb said ascorbic acid-2-sulfate,
- treating the adsorbent with a basic aqueous solution containing metal ions or substituted or non-substituted ammonium ions to elute the corresponding metal salt or substituted or non-substituted ammonium salt of ascorbic acid-2-sulfate.
Dependencies are inferred from the claim text.