Process for producing of citric acid and monovalent citrate salt

Details Process for producing of citric acid and monovalent citrate salt Process for producing of citric acid and monovalent citrate salt

1995-08-30

1996-07-02

Lilling, Herbert J.

Chemistry: molecular biology and microbiology

Micro-organism, tissue cell culture or enzyme using process...

Preparing oxygen-containing organic compound

435136, 435800, 435917, C12P 748

Patent

active

055321488

ABSTRACT:
A short process is disclosed for the production of citric acid in high yield and purity. Conidia of Aspergillus niger are cultured in an aqueous solution of decationized glucose syrup in a fermentation medium whose manganese(II) concentration is 2.5 to less than 20 parts per billion and whose pH value is about 1.5 to about 3.0. The fermentation medium is maintained for about 4-7 days to form citric acid and mycelia pellets in an aqueous product broth. That broth is filtered and then electrodialyzed to form a citric acid-containing aqueous broth. That broth is decolorized and ion-exchanged to remove color and inorganic ions and form an aqueous citric acid solution in which citric acid constitutes at least 98 percent of the organic acid present.

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