杉木CTMP过氧化物-TAED活化体系的漂白性能

Bleaching of China Fir CTMP Pulp with Peroxides Activated by TAED

以速生杉木CTMP为原料进行了H2O2、过碳酸钠（PC）和过硼酸钠（PB）与TAED组成的活化体系漂白性能的研究。过氧化物-TAED活化体系漂白反应可以在短时间内完成，适宜的漂白温度55～70℃、漂白时间60min；当过氧化物用量6％～8％时，浆料白度增值可达27％～29％；此漂白体系可使漂后浆料抗张指数、撕裂指数和耐破指数分别提高48％～74％、19％～32％和37％～54％。

Bleaching of CTMP Pulp which was produced from China fir , Cunninghamia lanceolata respectively with hydrogen peroxide , Sodium perborate and sodium percabonate activated by TAED was investigated in this paper. Compared with the peroxide bleaching without TAED, the bleaching with peroxide-TAED system can be carried out at lower temperature （55 -70℃ ） and shorter time （60 min）. TAED dosage was optimized and the suitable mole ratio of TAED to H2O2 is 0. 1. The CTMP pulp with initial brightness of 43.8% can obtain a brightness gain of 29.3% by bleaching with H2O2-TAED system under the following conditions： 70℃, 60min, the mole ratio of TAED to H2O2 0.1, 6% H2O2 dosage on oven dry pulp. Similarly a brightness gain of 27.6% ISO and 27.4% ISO can be obtained respectively by bleaching with sodium perborate-TAED and sodium percarbonate-TAED bleaching system at a dosage level of 8% of the peroxides on oven dry pulp calculated as H2O2.