EP 0940498 B1 20060517 - Method for treatment of pulp
Title (en)
Method for treatment of pulp
Title (de)
Verfahren zur Zellstoffbehandlung
Title (fr)
Procédé pour le traitement de pâte à papier
Publication
Application
Priority
FI 980519 A 19980306
Abstract (en)
[origin: EP0940498A1] The present invention relates to a method for treatment of pulp in an alkaline pulping process of chemical pulp. The pulp is treated in a chlorine dioxide stage comprising successive preferably a chlorine dioxide step and an acid treatment step at a pH of 2 - 5 and a temperature of over 80 DEG C. The conditions in the chlorine dioxide step are such that the hexenuronic acid groups in the pulp do not react with chlorine dioxide.
IPC 8 full level
CPC (source: EP US)
D21C 9/1026 (2013.01 - EP US); D21C 9/14 (2013.01 - EP US)
Designated contracting state (EPC)
DE ES FR PT SE
DOCDB simple family (publication)
EP 0940498 A1 19990908; EP 0940498 B1 20060517; CA 2264423 A1 19990906; CA 2264423 C 20030128; DE 69931295 D1 20060622; ES 2263236 T3 20061201; FI 119383 B 20081031; FI 980519 A0 19980306; FI 980519 A 19990907; PT 940498 E 20060929; US 2002056533 A1 20020516
DOCDB simple family (application)
EP 99103920 A 19990305; CA 2264423 A 19990305; DE 69931295 T 19990305; ES 99103920 T 19990305; FI 980519 A 19980306; PT 99103920 T 19990305; US 26291299 A 19990305