(19)

(11)

EP 1 365 990 A2

(12)

(88) Date of publication A3: 28.11.2002 (43) Date of publication: 03.12.2003 Bulletin 2003/49 (21) Application number: 02718175.9 (22) Date of filing: 04.03.2002

(51) International Patent Classification (IPC)7: C01B 3/38 (86) International application number: PCT/EP0202/367 (87) International publication number: WO 0207/0402 (12.09.2002 Gazette 2002/37)

(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: 05.03.2001 US 273354 P 05.03.2001 US 273353 P (71) Applicant: SHELL INTERNATIONALE RESEARCHMAATSCHAPPIJ B.V. 2596 HR Den Haag (NL)	(72) Inventors: MATZAKOS, Andreas, Nikolaos Missouri City, TX 77459 (US) MIKUS, Thomas Houston, TX 77077 (US) WARD, John, Michael Katy, TX 77450 (US) WELLINGTON, Scott, Lee Bellaire, TX 77401 (US)