(19)

(11)

EP 1 934 313 A1

(12)

(43) Date of publication: 25.06.2008 Bulletin 2008/26 (21) Application number: 06808945.7 (22) Date of filing: 18.09.2006

(51) International Patent Classification (IPC):  C10L 1/14(2006.01) C10L 10/18(2006.01) C10L 10/06(2006.01) (86) International application number: PCT/IB2006/002762 (87) International publication number: WO 2007/042887 (19.04.2007 Gazette 2007/16)

(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: 12.10.2005 US 248540 (71) Applicant: Nalco Company Sugar Land, TX 77478 (US)	(72) Inventors: SAWHNEY, Kailash, N. Sugar Land, TX 77478 (US) HEO, Richard, W. Houston, TX 77030 (US) (74) Representative: Maggs, Michael Norman et al Kilburn & Strode 20 Red Lion Street London WC1R 4PJ London WC1R 4PJ (GB)