CHLORINE DIOXIDE BLEACHING OF NaOH-AQ WHEAT STRAW PULP

The influences of chlorine dioxide bleaching of NaOH-AQ wheat straw pulp were studied in this paper. The results showed that the optimal conditions were as follows: chlorine dioxide dosage 1.0%,initial pH 4.0, pulp consistency 8% and 70℃ for 150 minutes. Furthermore, some ways of rebuild the conventional CEH bleaching sequence were put forward, such as CED, DED, DCED, and we draw a conclusion that CED, DCED has higher bleaching efficiency than the CEH bleaching process.