(19)
(11) EP 3 169 843 A1

(12)

(43) Date of publication:
24.05.2017 Bulletin 2017/21

(21) Application number: 15822791.8

(22) Date of filing: 10.07.2015
(51) International Patent Classification (IPC): 
D21C 3/02(2006.01)
D21H 21/32(2006.01)
(86) International application number:
PCT/US2015/039958
(87) International publication number:
WO 2016/010854 (21.01.2016 Gazette 2016/03)
(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
Designated Extension States:
BA ME
Designated Validation States:
MA

(30) Priority: 14.07.2014 US 201414330958

(71) Applicant: Nalco Company
Naperville, IL 60563 (US)

(72) Inventors:
  • DUGGIRALA, Prasad Y.
    Naperville, Illinois 60564 (US)
  • SHEVCHENKO, Sergey M.
    Aurora, Illinois 60502 (US)

(74) Representative: Godemeyer Blum Lenze Patentanwälte Partnerschaft mbB - werkpatent 
An den Gärten 7
51491 Overath
51491 Overath (DE)

   


(54) METHOD AND CHEMICAL COMPOSITIONS TO IMPROVE EFFICIENCY OF CHEMICAL PULPING