STUDY ON THE ISOCONCENTRATION PEROXIDE BLEACHING FOR POPLAR CTMP
Maintaining constant chemical concentration(Isoconcentration,IC)is an effective method to improve peroxide bleaching efficiency for chemi-thermomechanical pulp(CTMP).In this paper,the mechanism of the IC bleaching was investigated.The concentrations of H2O2 and total alkali in the IC bleaching were monitored and compared with that in the control bleaching methods.In addition,the blank experiments without pulp were carried out to explore the effects of bleaching additives on H2O2 decomposition.The results showed that the concentrations of H2O2 and the total alkali at the early and later stage in the IC bleaching were relatively low and high,respectively,thus the undesired decomposition of H2O2 was inhibited,and the brightness was improved.Moreover,the stabilizer played an important role in inhibiting the undesired H2O2 decomposition.These can explain why the high bleaching efficiency was achieved in the IC bleaching.Our findings were valuable for the production of chemi-mechanical pulp.
Xianqi Sun Qingxi Hou
Tianjin Key Laboratory of Pulp & Paper,Tianjin University of Science & Technology,Tianjin 300457,China
国际会议
第五届制浆造纸新技术国际研讨会(ISETPP)暨第三届国际造纸与环境学术大会(IPEC)
广州
英文
1-5
2016-11-07（万方平台首次上网日期，不代表论文的发表时间）