Chemistry: molecular biology and microbiology – Micro-organism – tissue cell culture or enzyme using process... – Preparing oxygen-containing organic compound
Patent
1995-06-02
1998-01-27
Wityshyn, Michael G.
Chemistry: molecular biology and microbiology
Micro-organism, tissue cell culture or enzyme using process...
Preparing oxygen-containing organic compound
435144, C12P 740, C12P 748
Patent
active
057121311
ABSTRACT:
This invention provides an improved process of recovering organic acid from an impure process stream, such as a fermentation broth, by the addition of a strong acid or salt thereof to the impure process stream. The process provides for essentially one step purification without the waste disposal problems or large capital investment required by either the conventional lime/sulfuric or solvent extraction recovery processes. The recovery can be further improved by treating the mother liquor remaining after separation of the citric acid crystals to obtain an additional yield. The preferred strong acid is sulfuric acid and the preferred mother liquor treatment is passage through an ion exclusion resin column.
REFERENCES:
patent: 4994609 (1991-02-01), Baniel et al.
patent: 5032686 (1991-07-01), Duflot et al.
patent: 5034105 (1991-07-01), Berglund et al.
Dissertation "The Enhanced Crystallization of Dicarboxylic acids . . . ", Jutten, pp. 1-66, 1992.
Felman Steven W.
Patel Chetna
Patwardhan Bhalchandra H.
Solow David J.
Bayer Corporation
Coe Roger N.
Ware Deborah K.
Wityshyn Michael G.
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