(19)
(11) EP 1 702 100 A2

(12)

(88) Date of publication A3:
03.11.2005

(43) Date of publication:
20.09.2006 Bulletin 2006/38

(21) Application number: 04805208.8

(22) Date of filing: 31.12.2004
(51) International Patent Classification (IPC): 
D21C 1/04(2006.01)
(86) International application number:
PCT/FI2004/000813
(87) International publication number:
WO 2005/064074 (14.07.2005 Gazette 2005/28)
(84) Designated Contracting States:
SE

(30) Priority: 31.12.2003 FI 20031937

(71) Applicant: Kemira Oyj
00180 Helsinki (FI)

(72) Inventors:
  • KOTONEN, Petteri
    FIN-53300 LAPPEENRANTA (FI)
  • VÄKIPARTA, Toni
    FIN-53810 LAPPEENRANTA (FI)
  • JÄKÄRÄ, Jukka
    FIN-33450 SIIVIKKALA (FI)
  • SVEDMAN, Mikael
    FIN-65100 VAASA (FI)

(74) Representative: Svensson, Johan Henrik et al
Berggren Oy Ab, P.O. Box 16
00101 Helsinki
00101 Helsinki (FI)

   


(54) PROCESS FOR REMOVING INTERFERING SUBSTANCES IN THE PRODUCTION OF MECHANICAL PULP AND PROCESS FOR PRODUCING MECHANICAL PULP