(19)

(11)

EP 1 789 521 A1

(12)

(43) Date of publication: 30.05.2007 Bulletin 2007/22 (21) Application number: 05756861.0 (22) Date of filing: 07.07.2005

(51) International Patent Classification (IPC):  C10M 163/00(2006.01) C10M 169/04(2006.01) C10M 167/00(2006.01) (86) International application number: PCT/EP2005/053241 (87) International publication number: WO 2006/005713 (19.01.2006 Gazette 2006/03)

(84) Designated Contracting States: DE ES FR GB IT (30) Priority: 09.07.2004 EP 04016206 (71) Applicant: Shell Internationale Research Maatschappij B.V. 2596 HR The Hague (NL)	(72) Inventors: BUSSE, Peter 21107 Hamburg (DE) LEONHARDT, Helmut 21107 Hamburg (DE) SANT, Peter Chester Cheshire CH2 4NU (GB) WILLARS, Malcolm, J. Chester Cheshire CH2 4NU (GB) (74) Representative: Zeestraten, Albertus W. J.  Shell International B.V. P.O. Box 384 NL-2501 CJ The Hague NL-2501 CJ The Hague (NL)