Improving the efficiency of hydrogen peroxide bleaching of chemimechanical pulp by continuous replenishment of bleaching chemicals

被引:3
作者
Sun, Xianqi [1 ]
Hou, Qingxi [1 ]
Zhang, Bingxu [1 ]
Zhao, Guanting [1 ]
机构
[1] Tianjin Univ Sci & Technol, Tianjin Key Lab Pulp & Paper, Tianjin, Peoples R China
来源
TAPPI JOURNAL | 2017年 / 16卷 / 06期
关键词
MECHANICAL PULPS; MAGNESIUM-HYDROXIDE; HIGH CONSISTENCY; OPTIMIZATION; CMP; CTMP;
D O I
10.32964/TJ16.6.331
中图分类号
TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];
学科分类号
0805 ; 080502 ; 0822 ;
摘要
Hydrogen peroxide (H2O2) is commonly used to bleach chemimechanical pulp. A decrease in the concentrations of the bleaching reagents throughout the bleaching process results in low bleaching efficiencies. In this study, chemical solutions were continuously added into the pulp slurry during the bleaching process to maintain constant concentrations of H2O2 and total alkali in the bleaching system to improve bleaching efficiency. The results showed that when the H2O2 and total alkali concentrations were maintained at 4.5 g/L and 0.79 g/L, respectively, for 50 min, the bleaching efficiency reached 16.79 (.% ISO brightness/.% H2O2 consumed [on ovendry pulp]), which was significantly higher than 7.38 obtained by using the high-consistency bleaching method. The results confirmed that continuous replenishment of chemical solutions into the bleaching system to maintain the constant chemical concentrations improved the efficiency of H2O2 bleaching of the chemimechanical pulp.
引用
收藏
页码:332 / 340
页数:9
相关论文
共 21 条
[1]  
Behrooz R, 2012, BIORESOURCES, V7, P161
[2]  
Ek M., 2009, PULP PAPER CHEM TECH
[3]   Analysis of factors affecting the performance of activated peroxide systems on bleaching of cotton fabric [J].
Fei, Xiuzhu ;
Yao, Jinlong ;
Du, Jinmei ;
Sun, Chang ;
Xiang, Zhonglin ;
Xu, Changhai .
CELLULOSE, 2015, 22 (02) :1379-1388
[4]   Modeling hydrogen peroxide bleaching to predict optical properties of bleached hardwood CMP [J].
Hatam, Abouzar ;
Pourtahmasi, Kambiz ;
Resalati, Hossein ;
Lohrasebi, A. Hossein .
WOOD SCIENCE AND TECHNOLOGY, 2008, 42 (05) :353-367
[5]  
Hietanen TM, 2013, BIORESOURCES, V8, P2337
[6]   High consistency hydrogen peroxide bleaching of mechanical pulps with varying amounts of fines [J].
Karlsson, Anette ;
Agnemo, Roland .
NORDIC PULP & PAPER RESEARCH JOURNAL, 2010, 25 (03) :256-268
[7]  
Li X. D, 2000, THESIS
[8]  
Li Z, 1996, PULP PAP-CANADA, V97, P46
[9]   Effects of Magnesium-Based Alkali on the Dissolved and Colloidal Substances in the Alkaline Peroxide Bleaching of Poplar CTMP [J].
Liu, Wei ;
Han, Song ;
Xu, Ningpan ;
Hou, Qingxi ;
Xu, Longsheng .
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2014, 53 (08) :2897-2902
[10]   Pressurized hydrogen peroxide bleaching of Eucalyptus globulus pulps.: Part I:: Effect of process variables [J].
Mota, Sofia F. ;
Paulo, Joana G. ;
Van Zeller, Carlos A. ;
Ferreira, Licinio M. G. ;
Carvalho, M. Graca V. S. .
NORDIC PULP & PAPER RESEARCH JOURNAL, 2007, 22 (01) :17-22