(19)

(11)

EP 1 838 819 A1

(12)

(43) Date of publication: 03.10.2007 Bulletin 2007/40 (21) Application number: 06718533.0 (22) Date of filing: 17.01.2006

(51) International Patent Classification (IPC):  C10L 1/02(2006.01) (86) International application number: PCT/US2006/001472 (87) International publication number: WO 2006/081089 (03.08.2006 Gazette 2006/31)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR (30) Priority: 25.01.2005 US 646741 P (71) Applicant: BP Corporation North America Inc. Warrenville, Illinois 60555 (US)	(72) Inventor: WOLF, Leslie, R. Naperville, Illinois 60564 (US) (74) Representative: Hamer, Christopher K. et al Mathys & Squire 120 Holborn London EC1N 2SQ London EC1N 2SQ (GB)