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(11)

EP 1 392 434 A1

(12)

(43) Date of publication: 03.03.2004 Bulletin 2004/10 (21) Application number: 02731815.3 (22) Date of filing: 17.05.2002

(51) International Patent Classification (IPC)7: B01J 38/12, B01J 20/34, B01J 38/06, C07C 27/00, C07C 27/06 (86) International application number: PCT/US2002/015460 (87) International publication number: WO 2002/092227 (21.11.2002 Gazette 2002/47)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 17.05.2001 US 291924 P (71) Applicant: ConocoPhilips Company Houston, TX 77079 (US)	(72) Inventors: WRIGHT, Harold, A. Ponca City, OK 74601 (US) RAJE, Ajoy Stillwater, OK 74074 (US) ESPINOZA, Rafael, L. Ponca City, OK 74604 (US) (74) Representative: Towler, Philip Dean  Frank B. Dehn & Co.,European Patent Attorneys,179 Queen Victoria Street London EC4V 4EL London EC4V 4EL (GB)