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(11)

EP 2 908 927 A1

(12)

(43) Date of publication: 26.08.2015 Bulletin 2015/35 (21) Application number: 13848441.5 (22) Date of filing: 18.10.2013

(51) International Patent Classification (IPC):  B01D 53/14(2006.01) B01D 53/48(2006.01) B01D 53/64(2006.01) B01D 53/78(2006.01) (86) International application number: PCT/US2013/065701 (87) International publication number: WO 2014/066175 (01.05.2014 Gazette 2014/18)

(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 (30) Priority: 22.10.2012 US 201213657484 (71) Applicant: Nalco Company Naperville, IL 60563 (US)

(72) Inventors: KEISER, Bruce A. Plainfiled, Illinois 60585 (US) SHAH, Jietendra Naperville, Illinois 60564 (US) MEIER, John V. Chicago, Illinois 60614 (US) DORNER, Robert W. Naperville, Illinois 60540 (US) YUAN, Jianwei Aurora, Illinois 60503 (US) STILES, Rebecca L. Naperville, Illinois 60540 (US) CARLSON, Wayne Batavia, Illinois 60510 (US) MLAMBO, Darlington Naperville, Illinois 60563 (US) (74) Representative: Godemeyer Blum Lenze Patentanwälte Partnerschaft mbB - werkpatent  An den Gärten 7 51491 Overath 51491 Overath (DE)