KINETICS OF CHLORINE DIOXIDE DELIGNIFICATION

The transformation function, developed for oxygen delignification of k raft pulps, can be also used to characterize chlorine dioxide delignif ication. The transformation function can be applied to different types of kraft pulp treated under well-mixed conditions at different pulp s tock consistencies. Simulations of the obtained transformation functio ns show clearly the effect of stock consistency on the delignification rate. At low temperature there are marked differences in delignificat ion rate between high and low consistencies. However these differences diminish when the temperature is increased to about 100 degrees C.