(19)

(11)

EP 2 593 534 A2

(12)

(88) Date of publication A3: 10.05.2012 (43) Date of publication: 22.05.2013 Bulletin 2013/21 (21) Application number: 11807421.0 (22) Date of filing: 13.07.2011

(51) International Patent Classification (IPC):  C10G 29/20(2006.01) C07C 7/152(2006.01) (86) International application number: PCT/US2011/043780 (87) International publication number: WO 2012/009391 (19.01.2012 Gazette 2012/03)

(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 (30) Priority: 14.07.2010 US 835805 (71) Applicant: Nalco Company Naperville, IL 60563-1198 (US)	(72) Inventors: COMPTON, Dennis R. Sugar Land Texas 77478 (US) STRICKLAND, J. Byron Bellaire Texas 77401 (US) (74) Representative: Polypatent  An den Gärten 7 51491 Overath 51491 Overath (DE)