Accelerated Dedgradation of Cellulose in the Presence of Lignin During Ozone Bleaching, 1996 International Pulp Bleaching Conference Proceedings
Kengo Magara (1) , Tsutomu Ikeda (2) ,Yoichi Tomimura (l) , and Shuji Hosoya (1,2)
1 Forestry and Forest Products Research Institute
2 Institute of Agricultural and Forest Engineering, University of Tsukuba
Some lignin-carbohydrate model systems were investigated to elucidate the effect of lignin on cellulose degradation during ozone bleaching of kraft pulps. In the presence of lignin model compounds with free phenolic hydroxyl groups, cellobiose degradation was accelerated until the lignin model compounds were consumed by the reaction with ozone. On the other hand, in the presence of lignin model compounds with etherified phenolic hydroxyl groups, restrained degradation of cellobiose was observed. From these results, we conclude that some active oxygen species formed from the reaction of ozone and lignin model compounds with phenolic hydroxyl groups accelerate the degradation of cellobiose during the ozonation in water.
Accelerated Dedgradation of Cellulose in the Presence of Lignin During Ozone Bleaching, 1996 Inter