EP 1463720 A1 20041006 - SYSTEMS AND METHODS FOR GENERATION OF ASCORBIC ACID WITH REDUCED COLOR
Title (en)
SYSTEMS AND METHODS FOR GENERATION OF ASCORBIC ACID WITH REDUCED COLOR
Title (de)
SYSTEME UND VERFAHREN ZUR HERSTELLUNG VON ASCORBINSÄURE MIT GERINGERER FÄRBUNG
Title (fr)
SYSTEMES ET PROCEDES DE GENERATION D'UN ACIDE ASCORBIQUE A COULEUR REDUITE
Publication
Application
Priority
- US 0232259 W 20021009
- US 32788401 P 20011009
Abstract (en)
[origin: WO03031427A1] The present invention describes the synthesis of ascorbic acid with reduced color. The present invention employs palladium catalysts for the synthesis of ascorbic acid from 2-keto-gulonic acid or derivatives of 2-keto-gulonic acid. The palladium catalyst may include an inert support such as, but not limited to, carbon or barium sulfate. Unlike other palladium catalysts, the catalyst of the present invention is active under aqueous conditions suitable for ascorbic acid synthesis. Also described are systems for the conversion of 2-keto-gulonic acid or derivatives of 2-keto-gulonic acid to ascorbic acid in the presence of a solid palladium catalyst and ascorbic acid of reduced color made by the methods of the present invention.
IPC 1-7
IPC 8 full level
B01J 23/44 (2006.01); C07B 61/00 (2006.01); C07D 307/62 (2006.01)
CPC (source: EP)
C07D 307/62 (2013.01); Y02P 20/582 (2015.11)
Citation (search report)
See references of WO 03031427A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
DOCDB simple family (publication)
WO 03031427 A1 20030417; CN 1266141 C 20060726; CN 1568319 A 20050119; EP 1463720 A1 20041006; JP 2005523881 A 20050811
DOCDB simple family (application)
US 0232259 W 20021009; CN 02820023 A 20021009; EP 02800980 A 20021009; JP 2003534410 A 20021009