(19)

(11)

EP 0 190 307 A1

(12)

(43) Date of publication: 13.08.1986 Bulletin 1986/33 (21) Application number: 85904130.0 (22) Date of filing: 23.08.1985

(51) International Patent Classification (IPC):  B01J 21/ 18( . ) B01J 23/ 75( . ) B01J 35/ 10( . ) B01J 23/ 74( . ) B01J 23/ 89( . ) C07C 1/ 04( . ) (86) International application number: PCT/GB1985/000378 (87) International publication number: WO 1986/001499 (13.03.1986 Gazette 1986/06)

(84) Designated Contracting States: BE DE FR GB IT NL (30) Priority: 25.08.1984 GB 19840021646 (71) Applicant: The British Petroleum Company p.l.c. London EC2Y 9BU (GB)	(72) Inventors: FOSTER, Alan, Ivor Ashford Middlesex TW15 2LU (GB) JOYNER, Richard, William Lightwater Surrey GU18 5XL (GB) McCARROLL, John, James Camberley Surrey GU15 1DT (GB) PARTINGTON, Stephen, Roy Ashtead Surrey KT21 1NS (GB) SPIERS, Ranald, Gordon, Lyon New York, NY 10023 (US) TENNISON, Stephen, Robert New Haw, Weybridge Surrey KT15 3HR (GB)