(19)

(11)

EP 2 041 255 A1

(12)

(43) Date of publication: 01.04.2009 Bulletin 2009/14 (21) Application number: 06787100.4 (22) Date of filing: 14.07.2006

(51) International Patent Classification (IPC):  C11D 3/02(2006.01) C11D 3/06(2006.01) C11D 3/33(2006.01) C11D 3/32(2006.01) C11D 3/10(2006.01) C11D 3/30(2006.01) C11D 3/37(2006.01) C11D 17/00(2006.01) (86) International application number: PCT/US2006/027149 (87) International publication number: WO 2008/008063 (17.01.2008 Gazette 2008/03)

(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 Designated Extension States: AL BA HR MK RS (71) Applicant: ECOLAB INC. St. Paul MN 55102-2233 (US)	(72) Inventors: RIGLEY, Karen O. Greensboro, NC 27410 (US) THEKKEKANDAM, Joseph Siler City, NC 27344 (US) (74) Representative: Polypatent  Postfach 11 07 51482 Overath 51482 Overath (DE)