Bleachability of Pinus Kesiya Diethanolamine Pulp

Pinus kesiya was cooked by diethanolamine and kraft pulping respectively. And two kinds of pulp were bleached by H2O2 and ClO2 single stage and multi-stage bleaching. Then, their bleachability was compared. The results show that pinus kesiya diethanolamine pulp is difficult to achieve higher brightness only by H2O2 or ClO2 single stage bleaching, and its brightness could exceed 80%ISO by OD0ED1 multi-stage bleaching. For diethanolamine pulp, compared with H2O2, ClO2 bleaching effect is more obvious. And the increase of diethanolamine pulp brightness is less favorable than kraft pulp under these same conditions.