(19)

(11)

EP 1 817 396 A1

(12)

(43) Date of publication: 15.08.2007 Bulletin 2007/33 (21) Application number: 05826443.3 (22) Date of filing: 12.12.2005

(51) International Patent Classification (IPC):  C10M 141/06(2006.01) (86) International application number: PCT/EP2005/056673 (87) International publication number: WO 2006/061437 (15.06.2006 Gazette 2006/24)

(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: 10.12.2004 EP 04257692 (71) Applicant: Shell Internationale Research Maatschappij B.V. 2596 HR The Hague (NL)	(72) Inventors: FUJITSU, Takashi Aikawa-cho, Aiko-gun, Kanagawa (JP) NAGATOMI, Eiji Aikawa-cho, Aiko-gun, Kanagawa (JP) GRIFFITHS, Joanna Chester Cheshire CH2 4NU (GB) TAYLOR, Robert Ian Chester Cheshire CH2 4NU (GB) (74) Representative: Zeestraten, Albertus W. J. et al Shell International B.V., Intellectual Property Services, P.O. Box 384 2501 CJ The Hague 2501 CJ The Hague (NL)