Invention Grant
- Patent Title: Process for the preparation of ascorbic acid
- Patent Title (中): 抗坏血酸的制备方法
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Application No.: US766276Application Date: 1996-12-13
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Publication No.: US5744618APublication Date: 1998-04-28
- Inventor: Ulrich Fechtel , Karlheinz Wembacher
- Applicant: Ulrich Fechtel , Karlheinz Wembacher
- Applicant Address: DEX Darmstadt
- Assignee: Merck Patent Gesellschaft Mit Beschrankter Haftung
- Current Assignee: Merck Patent Gesellschaft Mit Beschrankter Haftung
- Current Assignee Address: DEX Darmstadt
- Priority: DEX19547073.7 19951216
- Main IPC: C07D307/62
- IPC: C07D307/62
Abstract:
A process for the preparation of L-ascorbic acid by reacting 2-keto-L-gulonic acid with aqueous mineral acid in a solvent mixture containing an inert organic solvent, an aliphatic ketone and also an acid chloride.
Public/Granted literature
- US5224142A Rotary-anode type X-ray tube Public/Granted day:1993-06-29
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