One-step synthesis of vitamin-C (L-ascorbic acid)

Details One-step synthesis of vitamin-C (L-ascorbic acid) One-step synthesis of vitamin-C (L-ascorbic acid)

1999-03-15

1999-12-07

Owens, Amelia

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D30762

Patent

active

059986344

ABSTRACT:
A method is provided for producing L-ascorbic acid (Vitamin-C) in a single process step. Starting material, particularly a mixture of compounds from the group consisting of glucose, sorbitol, sorbose, and 2-keto-L-gulonic acid, is catalytically oxidized in aqueous solution by hypochlorous acid. L-ascorbic acid then can be separated from the aqueous solution, and the unconverted reactants recycled for greater conversion. The reaction occurs in the aqueous state at ambient temperature near a pH of 5.5 when an optimum amount of hydrous cobalt-oxide is present in the solution.

REFERENCES:
patent: 4491668 (1985-01-01), Ikawa et al.
patent: 5391770 (1995-02-01), Le Fur et al.
patent: 5744618 (1998-04-01), Fechtel et al.

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