文献类型：会议论文

英文题名：PRE-BLEACHING STUDY OF CHINA FIR CHEMITHERMOMECHANICAL PULPS

作者：Shen, Kuizhong[1] Fang, Guigan[1] Gao, Guilin[1]

第一作者：沈葵忠

通信作者：Shen, KZ[1]

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Nanjing 210042, Jiangsu, Peoples R China

会议论文集：International Mechanical Pulping Conference 2011

会议日期：JUN 26-29, 2011

会议地点：Xian, PEOPLES R CHINA

语种：英文

外文关键词：China fir; mechanical pulp; hydrogen peroxide bleaching; pre-bleaching; recycling of residual hydrogen peroxide

年份：2011

摘要：The CTMP pulp of China fir, Cunninghamia lanceolata, was difficulty to be brightened to high brightness at an economical cost. The promising bleaching sequences, the combination of a pre-bleaching stage and a main bleaching stag, namely the pre-bleaching process, can promise us a better brightness increase comparing to the post-bleaching process, the combination of a main bleaching stage and a post-bleaching stage. By using single hydrogen peroxide bleaching, the fir CTMP pulp can be brightened to just a brightness of 77.8 %ISO at the H2O2 application of 10%. Using the pre-bleaching process, a final brightness of 80.4 %ISO can be obtained at the total H2O2 application of 8%, not only getting a more brightness increase of 2.6% ISO but also saving 2% H2O2 charge on b.d. pulp. The recycling use of the bleach filtrates in the pre-bleaching stage exerts positive effects in raising pulp brightness and saving chemical costs as well.