Invention Application
US20060149084A1 Method for extracting 2-ketone-l-gulonic acid from a polar, preferably aqueous solvent
审中-公开
从极性，优选水溶剂中提取2-酮-1-古洛糖酸的方法
- Patent Title: Method for extracting 2-ketone-l-gulonic acid from a polar, preferably aqueous solvent
- Patent Title (中): 从极性，优选水溶剂中提取2-酮-1-古洛糖酸的方法
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Application No.: US10539960Application Date: 2003-12-13
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Publication No.: US20060149084A1Publication Date: 2006-07-06
- Inventor: Thomas Domschke , Martin Merger , Petra Deckert , Friedrich Sauer
- Applicant: Thomas Domschke , Martin Merger , Petra Deckert , Friedrich Sauer
- Priority: DE10260085.6 20021219; DE10316268.2 20030408
- International Application: PCT/EP03/14192 WO 20031213
- Main IPC: C07D307/62
- IPC: C07D307/62 ; C07C51/245
Abstract:
The present invention relates to a process for extracting 2-keto-L-gulonic acid (KGA) from a polar, preferably aqueous, solvent, preferably from a solvent which comprises a mixture of ascorbic acid and 2-keto-L-gulonic acid, by means of liquid/liquid extraction using an extractant which comprises a tertiary amine and a polar organic diluent. The process of the invention preferably also comprises steps for back-extraction of the KGA and recycling of the extractant. The present invention likewise relates to a process for preparing ascorbic acid from KGA and isolating the prepared ascorbic acid.
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