Abstract
Unbleached softwood kraft pulp (SWKP) and hardwood kraft pulp(HWKP) were biobleached with partially purified manganese peroxidase(MnP). Though a remarkable brightness increase of SWKP was not obtained by a single MnP treatment, repeated MnP treatment combined with alkaline extraction gave a significant delignification and brightening of SWKP. Total effective chlorine required to obtain a pulp of 85% ISO brightness by chemical bleaching after the repeated MnP treatment was reduced 51.4%, 66.2%, and 69.0% for normal-lignin-content SWKP, low-lignin-content SWKP, and HWKP, respectively, compared to conventional bleaching process without introducing MnP treatment.
| Original language | English |
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| Pages | 26-1/26 |
| Publication status | Published - 1997 |
| Externally published | Yes |
| Event | Proceedings of the 1997 9th International Symposium on Wood and Piping Chemistry, ISWPC. Part 1 (of 2) - Montreal, Can Duration: Jun 9 1997 → Jun 12 1997 |
Other
| Other | Proceedings of the 1997 9th International Symposium on Wood and Piping Chemistry, ISWPC. Part 1 (of 2) |
|---|---|
| City | Montreal, Can |
| Period | 6/9/97 → 6/12/97 |
All Science Journal Classification (ASJC) codes
- General Chemical Engineering