(19)

(11)

EP 1 765 963 A1

(12)

(43) Date of publication: 28.03.2007 Bulletin 2007/13 (21) Application number: 05773833.8 (22) Date of filing: 07.07.2005

(51) International Patent Classification (IPC):  C10M 169/04(2006.01) C10M 133/12(2006.01) C10M 129/76(2006.01) C10M 163/00(2006.01) C10M 129/10(2006.01) C10M 159/18(2006.01) (86) International application number: PCT/EP2005/053238 (87) International publication number: WO 2006/005711 (19.01.2006 Gazette 2006/03)

(84) Designated Contracting States: DE ES FR GB IT (30) Priority: 08.07.2004 EP 04254094 (71) Applicant: Shell Internationale Research Maatschappij B.V. 2596 HR The Hague (NL)	(72) Inventors: SANT, Peter Chester Cheshire CH2 4NU (GB) WAKEM, Mark Philip 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)