(19)

(11)

EP 1 379 608 A2

(12)

(88) Date of publication A3: 13.02.2003 (43) Date of publication: 14.01.2004 Bulletin 2004/03 (21) Application number: 02735255.8 (22) Date of filing: 11.04.2002

(51) International Patent Classification (IPC)7: C10G 11/18, B04C 5/14, B04C 5/18 (86) International application number: PCT/EP2002/004144 (87) International publication number: WO 2002/085527 (31.10.2002 Gazette 2002/44)

(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: 20.04.2001 US 285359 P (71) Applicant: SHELL INTERNATIONALE RESEARCHMAATSCHAPPIJ B.V. 2596 HR Den Haag (NL)	(72) Inventors: CHEN, Ye-Mon Sugar Land, TX 77479 (US) DEWITZ, Thomas, Shawn Bellaire, TX 77401 (US) DIRKSE, Hendricus, Arien Nl-1031 Cm Amsterdam (NL) DRIES, Hubertus, Wilhelmus, Albertus NL-1031 CM Amsterdam (NL) SANBORN, Richard, Addison Houston, TX 77024 (US)