(19)

(11)

EP 2 201 170 A1

(12)

(43) Date of publication: 30.06.2010 Bulletin 2010/26 (21) Application number: 08839424.2 (22) Date of filing: 15.10.2008

(51) International Patent Classification (IPC):  D21C 3/00(2006.01) D21B 1/12(2006.01) D21C 3/02(2006.01) D21C 9/08(2006.01) (86) International application number: PCT/FI2008/050574 (87) International publication number: WO 2009/050336 (23.04.2009 Gazette 2009/17)

(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 Designated Extension States: AL BA MK RS (30) Priority: 17.10.2007 FI 20075729 (71) Applicant: Kemira OYJ 00180 Helsinki (FI)	(72) Inventors: PRANOVICH, Andrey FI-20540 Turku (FI) HOLMBOM, Bjarne FI-20540 Turku (FI) KONN, Jonas FI-20520 Turku (FI) (74) Representative: Määttä, Jukka Tapani  Berggren Oy Ab Kirkkokatu 9 90100 Oulu 90100 Oulu (FI)