(19)

(11)

EP 0 759 897 A1

(12)

(43) Date of publication: 05.03.1997 Bulletin 1997/10 (21) Application number: 96904956.0 (22) Date of filing: 04.03.1996

(51) International Patent Classification (IPC):  B01J 31/ 08( . ) C07C 41/ 54( . ) C07C 41/ 58( . ) C07B 61/ 00( . ) C07C 41/ 56( . ) C07C 43/ 315( . ) (86) International application number: PCT/GB1996/000513 (87) International publication number: WO 1996/028409 (19.09.1996 Gazette 1996/42)

(84) Designated Contracting States: BE DE FR GB IT NL (30) Priority: 10.03.1995 GB 19950004913 (71) Applicant: BP Chemicals Limited London EC2M 7BA (GB)	(72) Inventors: BREW, Stephen, Alexander Hull HU3 2UE (GB) FROOM, Simon, Frederick, Thomas Nr Goole, Humberside DN14 9DR (GB) HODGE, Stephen, Robert Beverley, North Humberside HU17 0DF (GB) (74) Representative: Krishnan, Suryanarayana Kalyana  BP INTERNATIONAL LIMITED Patents & Agreements Division Chertsey Road Sunbury-on-Thames Middlesex TW16 7LN Sunbury-on-Thames Middlesex TW16 7LN (GB)