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
- 专利标题: Enzymatic process for the manufacture of L-ascorbic acid and D-erythorbic acid
- 专利标题(中): 用于制造L-抗坏血酸和D-异抗坏血酸的酶法
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申请号: US10494886申请日: 2002-10-31
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公开(公告)号: US07465563B2公开(公告)日: 2008-12-16
- 发明人: Tatsuo Hoshino , Tatsuya Kiyasu , Masako Shinjoh
- 申请人: Tatsuo Hoshino , Tatsuya Kiyasu , Masako Shinjoh
- 申请人地址: NL TE Heerlen
- 专利权人: DSM IP Assets B.V.
- 当前专利权人: DSM IP Assets B.V.
- 当前专利权人地址: NL TE Heerlen
- 代理机构: Bryan Cave LLP
- 优先权: EP01126768 20011109
- 国际申请: PCT/EP02/12157 WO 20021031
- 国际公布: WO03/040381 WO 20030515
- 主分类号: C12P17/04
- IPC分类号: C12P17/04 ; C07D305/12
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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