(19)

(11)

EP 1 664 247 A1

(12)

(43) Date of publication: 07.06.2006 Bulletin 2006/23 (21) Application number: 04766686.2 (22) Date of filing: 02.09.2004

(51) International Patent Classification (IPC):  C10L 1/04(1968.09) C10L 1/08(1968.09) (86) International application number: PCT/EP2004/052014 (87) International publication number: WO 2005/021688 (10.03.2005 Gazette 2005/10)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR (30) Priority: 03.09.2003 EP 03255506 (71) Applicant: SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V. 2596 HR Den Haag (NL)	(72) Inventors: MILLINGTON, Christopher Russell Chester Cheshire CH2 4NU (GB) STEPHENSON, Trevor Chester Cheshire CH2 4NU (GB)