(19)

(11)

EP 0 743 878 A1

(12)

(43) Date of publication: 27.11.1996 Bulletin 1996/48 (21) Application number: 95938493.0 (22) Date of filing: 28.11.1995

(51) International Patent Classification (IPC):  C07D 233/ 06( . ) C07B 61/ 00( . ) C07D 233/ 54( . ) B01J 31/ 02( . ) C07D 213/ 18( . ) (86) International application number: PCT/GB1995/002781 (87) International publication number: WO 1996/018459 (20.06.1996 Gazette 1996/28)

(84) Designated Contracting States: BE CH DE DK ES FR GB IT LI NL (30) Priority: 13.12.1994 GB 19940025105 (71) Applicant: BP Chemicals Limited London EC2M 7BA (GB)	(72) Inventor: ELLIS, Brian Middlesex TW16 7LN (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)