PEROXYACID ENHANCED OXYGEN DELIGNIFICATION OF KRAFT PULP

编号 zgly0000332855

文献类型 期刊论文

文献题名 PEROXYACID ENHANCED OXYGEN DELIGNIFICATION OF KRAFT PULP

学科分类 220.5570;林产化学加工学

作者 JianZhao  XuezhiLi  ShulanShi  HuirenHu 

作者单位 StateKeyLaboratoryofMicrobialTechnology 

母体文献 天津科技大学学报 

年卷期 2004,19(A01)

页码 173-178

年份 2004 

分类号 TS74 

关键词 氧化去木质素作用  牛皮纸浆  预处理  桉树  过氧酸 

文摘内容 Effect of peroxyacid (a mixture ofperoxymonosulfuric acid and peroxyacetic acid)pretreatment on oxygen delignification of kraft pulpfrom eucalyptus was studied, and the conditions ofpretreatment (e.g. DTPA charge, peroxyacid charge,pretreatment time, pretreatment temperature and pHvalue) were optimized. The results show thatperoxyacid pretreatment prior to oxygendelignification could enhance oxygen delignificationof kraft pulp, and result in selective delignificationand increased delignified-pulp brightness. Theoptimum conditions of peroxyacid pretreatment wereas follows: peroxyacid charge 3% (onperoxymonosulfuric acid), 60~C, 30min, 12% pulpconsistency, pH5.0. Pretreatment with 0.5%DTPAwas essential before peroxyacid pretreatment. Underthe optimum conditions, the degree of delignificationand brightness of final pulp were increased by 12.4%(from 44.9% to 57.3%) and 4.9%(ISO, from 54.0%to 58.9%) respectively while maintaining a similarviscosity of final pulps compared to single oxygendelignification。