ACID PRE-EXTRACTION OF HEMICELLULOSES PRIOR TO ASPEN CTMP PROCESS

摘要：

The effect of acid pre-extraction of hemicelluloses on Aspen (Populus tremuloides) chemi-thermomechanical pulp (CTMP) properties was investigated in this study. The aspen chips were press impregnated with dilute sulfuric acid and then cooked under various temperature and time. The cooked chips were pressed and impregnated with sulfite and then refined to produce CTMP pulps. The sulfuric acid pre-extraction resulted in a release of hemicelluloses and acetic acid, especially at the stage of second pressimpregnation. Compared with CTMP pulps without acid pre-extraction, the acid pre-extraction significantly reduced refining energy to a given freeness, and the pulps produced from acid pre-extracted chips have lower freeness, lower rejects, lower bulk, but higher physical strength properties at the similar refining energies.

关键词： value prior to pulping hemicelluloses pre-extraction chemi-thermomechanical pulping pulp properties

作者: Wei Liu Zhirun Yuan Changbin Mao Qingxi Hou Kecheng Li

作者单位: Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science & Technology, Tianjin, China,3 FPInnovations, Pointe-Claire, QC, Canada, H9R 3J9 Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science & Technology, Tianjin, China,3 Department of Chemical Engineering, University of New Brunswick, Fredericton, NB, Canada, E3B 6C2

会议类型: 国际会议

会议名称: 16th International Symposium on Wood,Fiber and Pulping Chemistry(第十六届木材、纤维及制浆化学国际会议)

会议地点: 天津

会议语种:英文

页码: 894-897

在线出版日期: 2011-06-08（万方平台首次上网日期，不代表论文的发表时间）