Patent ID: 6777212
Filing Date: 2004-08-17
Classification: C12P

Abstract:
A process for producing L-ascorbic acid, or a sodium, potassium or calcium salt thereof from 2-keto-L-gulonic acid, or a sodium, potassium or calcium salt of 2-keto-L-gulonic acid comprising:a. incubating in a solution a substrate comprising 2-keto-L-gulonic acid as a free acid or a sodium, potassium or calcium salt of 2-keto-L-gulonic acid, and a thermoacidophilic microorganism at about 30Â° C. to about 100Â° C. and at a pH from about 1 to about 6 to form L-ascorbic acid or a salt thereof; and b. isolating the L-ascorbic acid or salt thereof from the microorganism or the solution.