(19)

(11)

EP 0 846 093 A1

(12)

(43) Date of publication: 10.06.1998 Bulletin 1998/24 (21) Application number: 96918757.0 (22) Date of filing: 17.06.1996

(51) International Patent Classification (IPC):  B01J 21/ 16( . ) C07C 43/ 11( . ) C07C 41/ 03( . ) C07C 43/ 13( . ) (86) International application number: PCT/GB1996/001462 (87) International publication number: WO 1997/000842 (09.01.1997 Gazette 1997/03)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 22.06.1995 GB 19950012727 (71) Applicant: BP Chemicals Limited London EC2M 7BA (GB)	(72) Inventors: ATKINS, Martin, Philip Middlesex TW15 2QU (GB) DEPEGE, Corinne, Laurence F-63000 Clermont-Ferrand (FR) FORANO, Claude, René, Marcel F-63670 La Roche Blanche (FR) (74) Representative: Krishnan, Suryanarayana Kalyana, et al  c/o The British Petroleum Company plc Patents Division Chertsey Road Sunbury-on-Thames Middlesex TW16 7LN Sunbury-on-Thames Middlesex TW16 7LN (GB)