(19)

(11)

EP 0 408 664 A1

(12)

(43) Date of publication: 23.01.1991 Bulletin 1991/04 (21) Application number: 89905341.0 (22) Date of filing: 31.03.1989

(51) International Patent Classification (IPC):  B01J 29/ 04( . ) B01J 29/ 84( . ) C01B 25/ 36( . ) C01B 33/ 40( . ) C01B 37/ 06( . ) C01B 39/ 06( . ) C07B 61/ 00( . ) C10G 11/ 05( . ) B01J 29/ 83( . ) B01J 29/ 85( . ) C01B 25/ 45( . ) C01B 37/ 04( . ) C01B 37/ 08( . ) C01B 39/ 54( . ) C07C 5/ 22( . ) C10G 45/ 64( . ) (86) International application number: PCT/US1989/001353 (87) International publication number: WO 1989/009748 (19.10.1989 Gazette 1989/25)

(84) Designated Contracting States: BE DE FR GB IT NL SE (30) Priority: 08.04.1988 US 19880179173 08.04.1988 US 19880179331 08.04.1988 US 19880179343 (71) Applicant: MOBIL OIL CORPORATION New York New York 10017 (US)	(72) Inventors: CHANG, Clarence, Dayton Princeton, NJ 08540 (US) LUTNER, John, Dennis Hamilton Square, NJ 08690 (US) (74) Representative: Colmer, Stephen Gary, et al  Mobil Services Company Limited Patent Department Mobil House 50-60 Victoria Street London SW1E 6QB London SW1E 6QB (GB)