发明授权
US07465563B2 Enzymatic process for the manufacture of L-ascorbic acid and D-erythorbic acid 失效
用于制造L-抗坏血酸和D-异抗坏血酸的酶法

Enzymatic process for the manufacture of L-ascorbic acid and D-erythorbic acid
摘要:
A process for producing L-ascorbic acid from 2-keto-L-gulonic acid or D-erythorbic acid from 2-keto-D-gluconic acid by contacting 2-keto-L-gulonic acid or 2-keto-D-gluconic acid, respectively, with an enzym having α-amylase activity in solution. The solvent for this reaction can be water, an aqueous alcohol, an organic solvent or a mixture thereof. In each case, the starting material can be in the form of the free acid, the sodium salt, or the calcium salt.
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