(19)
(11) EP 1 278 909 A1

(12)

(43) Date of publication:
29.01.2003 Bulletin 2003/05

(21) Application number: 01925600.7

(22) Date of filing: 04.04.2001
(51) International Patent Classification (IPC)7: D21C 9/10
(86) International application number:
PCT/FI0100/326
(87) International publication number:
WO 0107/5220 (11.10.2001 Gazette 2001/41)
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 05.04.2000 FI 20000801

(71) Applicants:
  • AGA AB
    181 81 Lidingö (SE)
  • Stora Enso Oyj
    00160 Helsinki (FI)

(72) Inventors:
  • JOKINEN, Petri, Juhana
    FIN-00810 Helsinki (FI)
  • KAHALA, Jarmo, Tapio
    FIN-02600 Espoo (FI)
  • SONNI, Hannu, Sakari
    FIN-55100 Imatra (FI)

(74) Representative: Hjelt, Pia Dorrit Helene et al
Borenius & Co Oy AbTallberginkatu 2 A
00180 Helsinki
00180 Helsinki (FI)

   


(54) A METHOD FOR CONTROLLING THE DELIGNIFICATION AND BLEACHING OF A PULP SUSPENSION