Invention Grant
US07696360B2 Method for the separation of ascorbic acid from a polar solvent containing ascorbic acid and 2-keto-L-gulonic acid
失效
从含抗坏血酸和2-酮-L-古洛糖酸的极性溶剂中分离抗坏血酸的方法
- Patent Title: Method for the separation of ascorbic acid from a polar solvent containing ascorbic acid and 2-keto-L-gulonic acid
- Patent Title (中): 从含抗坏血酸和2-酮-L-古洛糖酸的极性溶剂中分离抗坏血酸的方法
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Application No.: US10515625Application Date: 2003-07-07
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Publication No.: US07696360B2Publication Date: 2010-04-13
- Inventor: Gerd Kaibel , Martin Merger , Thomas Domschke , Petra Deckert , Friedrich Sauer
- Applicant: Gerd Kaibel , Martin Merger , Thomas Domschke , Petra Deckert , Friedrich Sauer
- Applicant Address: DE Ludwigshafen
- Assignee: BASF Aktiengesellschaft
- Current Assignee: BASF Aktiengesellschaft
- Current Assignee Address: DE Ludwigshafen
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
- Priority: DE10231890 20020712
- International Application: PCT/EP03/07256 WO 20030707
- International Announcement: WO2004/007474 WO 20040122
- Main IPC: C07D307/62
- IPC: C07D307/62
Abstract:
The invention relates to a method for the separation of ascorbic acid from a mixture containing ascorbic acid and 2-keto-L-gulonic acid in a polar, preferably aqueous solvent, by means of liquid/liquid extraction using an amide. The method preferably also comprises steps for the back-extraction of the ascorbic acid, recycling of the extraction solvent and/or the back extraction solvent and for isolation of the ascorbic acid from the back extraction solvent. The invention further relates to a method for the production of ascorbic acid from KGA and isolation of the ascorbic acid so produced.
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