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(11)

EP 1 051 463 A1

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(43) Date of publication: 15.11.2000 Bulletin 2000/46 (21) Application number: 98919702.5 (22) Date of filing: 09.01.1998

(51) International Patent Classification (IPC)7: C10L 1/22, C10L 1/26 (86) International application number: PCT/US9800/264 (87) International publication number: WO 9935/216 (15.07.1999 Gazette 1999/28)

(84) Designated Contracting States: BE DE FR GB IT NL (71) Applicant: ExxonMobil Research and Engineering Company (Delaware Corp) Florham Park, New Jersey 07932-0390 (US)	(72) Inventors: WISOTSKY, Max, J. Highland Park, NJ 08904 (US) BELTZER, Morton Westfield, NJ 07090 (US) ASHCRAFT, Thomas, L., Jr. Leander, TX 78641 (US) BERLOWITZ, Paul, J. Glen Gardner. NJ 08826 (US) (74) Representative: Somers, Harold Arnold  ESSO Engineering (Europe) Ltd.Patents & LicencesMailpoint 12Esso HouseErmyn Way Leatherhead,Surrey KT22 8XE Leatherhead,Surrey KT22 8XE (GB)