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(11)

EP 1 971 676 A1

(12)

(43) Date of publication: 24.09.2008 Bulletin 2008/39 (21) Application number: 05825278.4 (22) Date of filing: 18.01.2006

(51) International Patent Classification (IPC):  C11D 7/24(2006.01) C10G 75/04(2006.01) C11D 11/00(2006.01) C11D 3/18(2006.01) (86) International application number: PCT/EP2005/056899 (87) International publication number: WO 2007/082550 (26.07.2007 Gazette 2007/30)

(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 (71) Applicant: Shell Internationale Research Maatschappij B.V. 2596 HR Den Haag (NL)

(72) Inventors: KAIJA, Steven, Paul Port Moody, British Columbia V3H 4T1 (CA) LACRAMPE, Marc, Rene, Charles St. Albert, Alberta T8N 6T3 (CA) PERRIN, Daryl, Alban Calgary, Alberta T2L 1Y8 (CA) POWER, William, James Calgary, Alberta T2L 1Y8 (CA) (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)