发明授权
- 专利标题: Production of L-ascorbic acid
- 专利标题(中): 生产L-抗坏血酸
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申请号: US2513申请日: 1993-01-08
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公开(公告)号: US5902885A公开(公告)日: 1999-05-11
- 发明人: Kunio Takanohashi , Mitsutaka Tanaka , Toru Yamano
- 申请人: Kunio Takanohashi , Mitsutaka Tanaka , Toru Yamano
- 申请人地址: JPX
- 专利权人: Takeda Chemical Industries, Ltd.
- 当前专利权人: Takeda Chemical Industries, Ltd.
- 当前专利权人地址: JPX
- 优先权: JPX62-142504 19870608
- 主分类号: C07D307/62
- IPC分类号: C07D307/62
摘要:
L-ascorbic acid is produced by allowing an acid to act on 2-keto-L-gulonic acid in a mixture solvent of an inert organic solvent and an aliphatic ketone in the presence of water and a surfactant.The method produces L-ascorbic acid in a high yield 90% or more and is an industrially advantageous method.