(19)

(11)

EP 2 366 013 A1

(12)

(43) Date of publication: 21.09.2011 Bulletin 2011/38 (21) Application number: 08878537.3 (22) Date of filing: 04.12.2008

(51) International Patent Classification (IPC):  C11D 3/386(2006.01) C11D 7/42(2006.01) (86) International application number: PCT/IB2008/055108 (87) International publication number: WO 2010/064086 (10.06.2010 Gazette 2010/23)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR (71) Applicant: Ecolab INC. St. Paul, MN 55102 (US)	(72) Inventors: FORTH, Peter 40217 Düsseldorf (DE) MERZ, Thomas 40723 Hilden (DE) (74) Representative: Polypatent  Braunsberger Feld 29 51429 Bergisch Gladbach 51429 Bergisch Gladbach (DE)