(19)

(11)

EP 0 580 587 A1

(12)

(43) Date of publication: 02.02.1994 Bulletin 1994/05 (21) Application number: 92903743.0 (22) Date of filing: 18.12.1991

(51) International Patent Classification (IPC):  C10L 1/ 14( . ) C10L 1/ 222( . ) C10L 1/ 24( . ) C10L 10/ 08( . ) C10M 133/ 16( . ) C10M 135/ 18( . ) C10L 1/ 18( . ) C10L 1/ 30( . ) C10N 40/ 26( . ) C10L 1/ 22( . ) C10L 1/ 224( . ) C10L 1/ 26( . ) C10M 133/ 06( . ) C10M 135/ 12( . ) C10M 169/ 04( . ) C10L 1/ 20( . ) C10N 30/ 00( . ) F02B 75/ 02( . ) (86) International application number: PCT/US1991/009599 (87) International publication number: WO 1992/012224 (23.07.1992 Gazette 1992/19)

(84) Designated Contracting States: GB IT (30) Priority: 27.12.1990 US 19900634984 27.12.1990 US 19900634835 27.12.1990 US 19900634836 (71) Applicant: EXXON RESEARCH AND ENGINEERING COMPANY Florham Park, New Jersey 07932-0390 (US)	(72) Inventors: HABEEB, Jacob, Joseph Westfield, NJ 07090 (US) MAY, Christopher, John Sarnia, Ontario N7S 4A7 (US) (74) Representative: Fletcher Watts, Susan J., et al  ESSO Engineering (Europe) Limited, Patents and Licences, Mailpoint 72, Esso House, Ermyn Way Leatherhead, Surrey KT22 8XE Leatherhead, Surrey KT22 8XE (GB)