Process for the production and purification of succinic acid

Details Process for the production and purification of succinic acid Process for the production and purification of succinic acid

C - Chemistry, Metallurgy

12

P

195/131, 195/67,

C12P 7/46 (2006.01) C07C 51/02 (2006.01) C07C 51/42 (2006.01)

Patent

CA 1334583

A process for producing and purifying succinic acid comprises growing a succinate salt-producing micro- organism on an inexpensive substrate containing carbohydrate, other nutrients, sodium ions and tryptophan under a CO2 partial pressure until most of the carbohydrate is converted to succinate. The fermentation broth is then electrodialyzed to recover and concentrate the succinate salt in an aqueous stream which is subjected to water-splitting electrodialysis to form base and a succinic acid product. The resulting succinic acid product is treated first with a strongly acidic ion exchanger in the acid form to remove any sodium or other cations and then treated with a weakly basic ion exchanger in the free base form to remove any sulfate ions or sulfuric acid and to obtain a highly purified succinic acid product.

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