EP 1575968 A1 20050921 - METHOD FOR EXTRACTING 2-KETONE-L-GULONIC ACID FROM A POLAR, PREFERABLY AQUEOUS SOLVENT
Title (en)
METHOD FOR EXTRACTING 2-KETONE-L-GULONIC ACID FROM A POLAR, PREFERABLY AQUEOUS SOLVENT
Title (de)
VERFAHREN ZUM EXTRAHIEREN VON 2-KETO-L-GULONSÄURE (KGS) AUS EINEM POLAREN, VORZUGSWEISE WÄSSRIGEN LÖSUNGSMITTEL
Title (fr)
PROCEDE POUR EXTRAIRE DE L'ACIDE 2-CETO-L-GULONIQUE A PARTIR D'UN SOLVANT POLAIRE, DE PREFERENCE AQUEUX
Publication
Application
Priority
- DE 10260085 A 20021219
- DE 10316268 A 20030408
- EP 0314192 W 20031213
Abstract (en)
[origin: WO2004056841A1] The invention relates to a method for extracting 2-ketone-L-gulonic acids from a polar, preferably aqueous solvent, preferably from a solvent which contains a mixture of ascorbic acid and 2-ketone-L-gulonic acid, by means of liquid-liquid extraction with the aid of an extraction agent which contains a tertiary amine and a polar organic diluent. Preferably, the inventive method also comprises steps for retro-extracting the 2-ketone-L-gulonic acid and for returning the extraction agent. The invention also relates to a method for producing ascorbic acid from 2-ketone-L-gulonic acid and for isolating the thus produced ascorbic acid.
IPC 1-7
IPC 8 full level
C07H 1/06 (2006.01); C07H 7/027 (2006.01)
CPC (source: EP US)
C07H 1/06 (2013.01 - EP US); C07H 7/027 (2013.01 - EP US)
Citation (search report)
See references of WO 2004056841A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2004056841 A1 20040708; AU 2003290036 A1 20040714; CA 2510026 A1 20040708; EP 1575968 A1 20050921; JP 2006516148 A 20060622; US 2006149084 A1 20060706
DOCDB simple family (application)
EP 0314192 W 20031213; AU 2003290036 A 20031213; CA 2510026 A 20031213; EP 03782392 A 20031213; JP 2005502539 A 20031213; US 53996005 A 20050617