EP 1001952 A2 20000524 - PROCESS FOR PREPARING L-ASCORBIC ACID
Title (en)
PROCESS FOR PREPARING L-ASCORBIC ACID
Title (de)
VERFAHREN ZUR HERSTELLUNG VON L-ASCORBINSÄURE
Title (fr)
PROCEDE DE PREPARATION D'ACIDE L-ASCORBIQUE
Publication
Application
Priority
- DE 19734086 A 19970807
- EP 9804649 W 19980724
Abstract (en)
[origin: DE19734086C1] A process is disclosed for preparing L-ascorbic acid by reaction of 2-keto-L-gulonic acid with concentrated mineral acid at temperatures of between 40 and 80 DEG C.
IPC 1-7
IPC 8 full level
C07D 307/62 (2006.01)
CPC (source: EP KR)
C07D 307/62 (2013.01 - EP KR)
Citation (search report)
See references of WO 9907691A2
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI LU NL PT SE
DOCDB simple family (publication)
DE 19734086 C1 19980813; AR 010938 A1 20000712; AU 9156298 A 19990301; BR 9811855 A 20000815; CA 2299364 A1 19990218; CN 1265655 A 20000906; CO 4770883 A1 19990430; EP 1001952 A2 20000524; ID 25547 A 20001012; JP 2001512722 A 20010828; KR 20010022595 A 20010326; WO 9907691 A2 19990218; WO 9907691 A3 19990408
DOCDB simple family (application)
DE 19734086 A 19970807; AR P980103913 A 19980807; AU 9156298 A 19980724; BR 9811855 A 19980724; CA 2299364 A 19980724; CN 98807955 A 19980724; CO 98045322 A 19980806; EP 9804649 W 19980724; EP 98943779 A 19980724; ID 20000174 A 19980724; JP 2000506195 A 19980724; KR 20007001187 A 20000203