(19)

(11)

EP 0 958 047 A1

(12)

(43) Date of publication: 24.11.1999 Bulletin 1999/47 (21) Application number: 97934533.0 (22) Date of filing: 22.07.1997

(51) International Patent Classification (IPC):  B01J 29/ 16( . ) C10G 49/ 06( . ) B01J 23/ 656( . ) C10G 49/ 08( . ) (86) International application number: PCT/EP1997/004013 (87) International publication number: WO 1998/004345 (05.02.1998 Gazette 1998/05)

(84) Designated Contracting States: BE CH DE DK ES FI FR GB IT LI NL SE (71) Applicant: SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V. 2596 HR Den Haag (NL)	(72) Inventors: BARRE, Guy F-76530 Grand Couronne (FR) GRANDVALLET MAHTOUT, Taous F-76530 Grand Couronne (FR) LEBIGRE, Sylvie, Claude F-76530 Grand Couronne (FR) (74) Representative: Zeestraten, Albertus Wilhelmus Joannes, et al  Shell International B.V., Intellectual Property Services, P.O. Box 384 2501 CJ The Hague 2501 CJ The Hague (NL)