Method of purifying L-ascorbic acid

Details Method of purifying L-ascorbic acid Method of purifying L-ascorbic acid

1986-07-01

1988-10-18

Milestone, Norma S.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D30762

Patent

active

047789026

ABSTRACT:
A method of purifying L-ascorbic acid which comprises: bringing an acidic aqueous solution of L-ascorbic acid which contains a cationic surfactant into contact with active carbon activated by chemicals.
The method is in particular useful for removing a cationic surfactant from a reaction mixture of diacetone-2-keto-L-gulonic acid or 2-keto-L-gulonic acid with a mineral acid in the presence of an inert solvent and a cationic surfactant, to produce L-ascorbic acid.

REFERENCES:
patent: 4233202 (1980-11-01), Berger et al.
Ikuo Abe et al, Chemical Abstracts 85:51333y.
M. Takashio et al, Chemical Abstracts 90:56246k.
M. Layard et al, Chemical Abstracts 103:110485q; Journal de Chimie Physique (1985), vol. 82(4), pp. 415-419.
English Translation of Japan 53/98,955.

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