Process for preparing ascorbic acid
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United States of America Patent
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Feb 21, 1995
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app pub date -
Dec 23, 1993
filing date -
Jun 12, 1989
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Abstract
Process for preparing pure ascorbic acid from 2-keto-L-gulonic acid or its sodium salt, by carrying out the following successive steps: esterification of 2-keto-L-gulonic acid or its sodium salt lactonization to sodium ascorbate optional separation of the sodium ascorbate displacement of the ascorbic acid from its salt separation of the sodium sulphate separation and purification of the ascorbic acid from its methanolic or aqueous-methanolic solution.
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