(19)
(11) EP 1 463 720 A1

(12)

(43) Date of publication:
06.10.2004 Bulletin 2004/41

(21) Application number: 02800980.1

(22) Date of filing: 09.10.2002
(51) International Patent Classification (IPC)7C07D 307/62
(86) International application number:
PCT/US2002/032259
(87) International publication number:
WO 2003/031427 (17.04.2003 Gazette 2003/16)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 09.10.2001 US 327884 P

(71) Applicant: EASTMAN CHEMICAL COMPANY
Kingsport, TN 37660 (US)

(72) Inventor:
  • ZOELLER, Joseph, R.
    Kingsport, TN 37660-2367 (US)

(74) Representative: Jones Day 
Rechtsanwälte, Attorneys-at-Law, PatentanwältePrinzregentenstrasse 11
80538 München
80538 München (DE)

   


(54) SYSTEMS AND METHODS FOR GENERATION OF ASCORBIC ACID WITH REDUCED COLOR