METHOD FOR BLEACHING PULP WITH CHLORINE DIOXIDE

摘要

A method of treating pulp with chlorine dioxide according to which clorine dioxide is mixed in the pulp and the mixture thus produced is fed into a treatment vessel (42) in which the chlorine dioxide treatment is carried out at a temperature of 40-90 ~C and at a pH of 1.5-6.5. The pulp is discharged from the treatment vessel in a closed space straight to a chlorine dioxide stage washer (44) ensuring that no detrimental amounts of residual dioxide remain in the pulp flowing to the washer.