Ammonium fumarate → L-Aspartic Acid

Participants

Reaction Steps

A batch type process wherein the catalyst compositions are stirred in from 0.1 to 5.0 molar (preferably 0.5 to 2.0 molar) solutions of ammonium fumarate in water at 5.0 to 10.0 pH (preferably 7.5 to 9.5 pH) for periods of 1.0 to 100 hours (preferably 8 to 48 hours) at temperatures below 60° C. (preferably 20° to 45° C.). Broadly from 0.05 to 50 g of immobilized cells, preferably from 1.0 to 15 g, are used per 1.0 mole of starting ammonium fumarate. After the conversion, the catalyst compositions may be removed by filtration or the equivalent for reuse in converting fresh batches of fumarate solutions. The product solutions are obtained in a form suitable for conventional processing to isolate the L-aspartic acid (acidification, precipitation, filtration, washing, recrystallization, drying).

Provenance & Evidence