(19)

(11)

EP 0 794 834 A1

(12)

(43) Date of publication: 17.09.1997 Bulletin 1997/38 (21) Application number: 95941058.0 (22) Date of filing: 27.11.1995

(51) International Patent Classification (IPC):  B01J 35/ 04( . ) B01J 37/ 02( . ) C01B 3/ 40( . ) B01J 35/ 06( . ) C01B 3/ 38( . ) (86) International application number: PCT/EP1995/004713 (87) International publication number: WO 1996/016737 (06.06.1996 Gazette 1996/26)

(84) Designated Contracting States: GB NL (30) Priority: 28.11.1994 EP 19940203453 (71) Applicant: SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V. 2596 HR Den Haag (NL)	(72) Inventors: KUMAR, Krishnankutty, Nair, Padma NL-1031 CM Amsterdam (NL) LEDNOR, Peter, William NL-1031 CM Amsterdam (NL) SEARCY-ROBERTS, Katherine NL-1031 CM Amsterdam (NL) VAN DER ZWET, Gerardus, Petrus NL-1031 CM Amsterdam (NL) SCHOONEBEEK, Ronald, Jan NL-1031 CM Amsterdam (NL) LANGE, Jean-Paul NL-1031 CM Amsterdam (NL)