STUDY ON THE ELEMENTAL CHLORINE FREE BLEACHING OF BAMBOO KRAFT PULP

编号 zgly0000332947

文献类型 期刊论文

文献题名 STUDY ON THE ELEMENTAL CHLORINE FREE BLEACHING OF BAMBOO KRAFT PULP

学科分类 220.5570;林产化学加工学

作者 ChengrongQin  HuaiyuZhan  BingyunLi  JiriBasta  ThomasGreschiri 

作者单位 StateKeyLabofPulpandPaperEngineering 

母体文献 天津科技大学学报 

年卷期 2004,19(A02)

页码 281-284

年份 2004 

分类号 TS745 

关键词 竹牛皮纸纸浆  螯合作用  过氧化氢漂白  DQP  污染 

文摘内容 The influential factors of DQP bleaching, chlorine dioxide bleaching, chelation and hydrogen peroxide bleaching, of bamboo kraft pulp were studied. The pH value in D stage, dosage of EDTA in Q stage and charge of MgSO4 in P stage were optimized. The results indicated that good results of chlorine dioxide bleaching were obtained under the conditions of C1O2 2.0% ,pH 4, and the highest final brightness (86.4% ISO) and the lowest final Kappa number(1.37) were attained when the charge of EDTA in Q stage was 0.4%, charge of MgSO4 in P stage was 0.2%, and the other conditions of P stage : pulp consistency 10%, H2O2 charge 2.5%, Na)H charge 1.4%, temperature 90℃ and time 120 min. A comparison of bleaching results, pulp strength and effluent characteristics of bamboo kraft pulp between DQP and CEH sequences was done. The results indicated that bamboo kraft pulp could be bleached to brightness of above 83% ISO by both DQP andCEH sequences. Compared with CEH bleached pulp, DQP bleached pulp had slightly lower brightness, better brightness stability, higher pulp viscosity, better strength properties and lower pollution loads。