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(11)

EP 3 221 437 A1

(12)

(43) Date of publication: 27.09.2017 Bulletin 2017/39 (21) Application number: 15861846.2 (22) Date of filing: 21.10.2015

(51) International Patent Classification (IPC):  C11D 1/66(2006.01) C11D 3/16(2006.01) C11D 1/72(2006.01) (86) International application number: PCT/US2015/056570 (87) International publication number: WO 2016/081132 (26.05.2016 Gazette 2016/21)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: MA (30) Priority: 17.11.2014 GB 201420331 (71) Applicant: Ecolab USA Inc. St. Paul, MN 55102 (US)	(72) Inventor: DURRSCHMIDT, Thomas J. 40724 Hilden (DE) (74) Representative: HGF Limited  Delta House 50 West Nile Street Glasgow G1 2NP 50 West Nile Street Glasgow G1 2NP (GB)