2SiO₃ in hydrogen peroxide bleaching process were compared. The results showed that when the dosage of NaOH was 3%， the dosage of H₂O₂ was 5%， and the bleaching time was 60 min， the optimal dosage of bleaching stabilizer （LS-8838， SB-005， KML） was 0.3%， pulp concentration was 25%， and bleaching temperature was 80 ℃. The bleaching effect with dosage of Na₂SiO₃ of 1.5% could be achieved by adding three bleaching stabilizers with dosage of 0.3%， and the brightness was 75.4%， 76.4% and 74.4%， respectively. The amount of residual H₂O₂ was 62.5%， 135.4% and 87.5%， and the tensile strength of the paper made from it was increased by 14.3%， 18.6% and 0.6%， respectively. Among them， the slurry treated by SB-005 had the best brightness and strength， but its silicon content was higher and the scaling phenomenon was more serious. The bleaching effect （amount of residual H₂O₂， whiteness， and intensity） of LS-8838 and phosphorus-containing silica-free KML was also better than that of Na₂SiO₃， among which LS-8838 had the best bleaching effect and no scaling phenomenon， and could be used as a substitute for sodium silicate.]]> 2024/7/22 18:26:07 CHENG Ming,TENG Bubin,JI Wenhu,CHENG Yun,ZHANG Hongjie,ZHANG Xue,HOU Leilei,CHEN Linghua,CHEN Xuemei 10true 2024/5/30 14:33:38 LIU Jian’an,GE Ge,WANG Huanhuan,FAN Huiming 9true 2024/5/30 14:33:39 ZHANG Yong,LI Xiaorui 8true 2024/4/22 15:39:18 GAO Xinyu,TIAN Xiuzhi,CHEN Ting,LI Mingqin,BAI Haozhe,JIANG Xue 7true 2024/4/22 15:39:19 MA Pu,YANG Yunyan,MA Yuqin,XU Fang,WU Wenda,GUO Lifang,HUANG Jun 6true 2024/4/22 15:39:21 WANG Kuijiang,ZHOU Hongliang,ZHA Wangmin,YANG Lei,LIANG Conghui,CHEN Wenjie 5true 2024/4/11 18:55:29 LIU Qian,FEI Guiqiang,YANG Chenrong,XIE Pan 4true 2024/2/29 11:22:34 LI Xiaofeng,LIU Yang,MA Dongsheng,ZHANG Xiumei 3true 2O₂） stabilizer was prepared by using maleic acid-acrylic acid copolymer （MA-AA） as the main stabilizer and compounded with chelating co-stabilizer. The stability of the composite stabilizer for H₂O₂ bleaching was studied by measuring the chelating ability of metal ions， the decomposition rate of H₂O₂ and the H₂O₂ bleaching experiment of chemi-mechanical pulp， and the performance of the composite stabilizer was compared with that of the imported stabilizer. The results showed that the chelating capacity of Fe³⁺， M^g2+， Mn²⁺， Ca²⁺of the new H₂O₂ stabilizer reached 262.3， 105.2， 141.4， 160.3 mg/g， respectively. Under the condition of simulating the different metal ion contents in the water of four regions in China， the new H₂O₂ stabilizer could effectively inhibit the decomposition of H₂O₂， and had the same stability ability as the imported products. Under the condition of industrial pulp bleaching process， the compound stabilizer had good bleaching effect on eucalyptus， poplar， bagasse， and reed chemi-mechanical pulp at low dosage.]]> 2024/2/29 11:22:35 ZHOU Wanxin,YE Wenxin,YANG Tao,LI Sensen,TANG Xuan,CHENG Xitao 2true 2024/2/29 11:22:37 ZHOU Tong,WANG Yuxiao,HE Jingyi,DOU Wenfang,LIU Zehua 1true