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Effect of Washing on Oxygen Delignification of Eucalyptus Chemical Pulp
Received:May 15, 2024  
DOI：10.11980/j.issn.0254-508X.2024.08.022
Key Words:washing  COD  oxygen delignification  viscosity
Author NameAffiliationPostcode
LU Qinghui Shandong Sunpaper Industry Joint Stock Co.， Ltd.， Jining， Shandong Province， 272100
Guangxi Sunpaper Industry Co.， Ltd.， Beihai， Guangxi Zhuang Autonomous Region， 536000 		536000
CAO Yanjun Shandong Sunpaper Industry Joint Stock Co.， Ltd.， Jining， Shandong Province， 272100 272100
DAI Zhongying Shandong Sunpaper Industry Joint Stock Co.， Ltd.， Jining， Shandong Province， 272100
Guangxi Sunpaper Industry Co.， Ltd.， Beihai， Guangxi Zhuang Autonomous Region， 536000 		536000
LI Zhi* Shandong Sunpaper Industry Joint Stock Co.， Ltd.， Jining， Shandong Province， 272100
Guangxi Sunpaper Industry Co.， Ltd.， Beihai， Guangxi Zhuang Autonomous Region， 536000 		536000
YANG Yanyu Guangxi Sunpaper Industry Co.， Ltd.， Beihai， Guangxi Zhuang Autonomous Region， 536000 536000
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Abstract:In this study， the unbleached kraft pulp of eucalyptus from Guangxi was used as raw material， the oxygen delignification reaction was carried out of unbleached pulp with different washing conditions. The effects of different washing degree on the brightness， delignification rate， viscosity reduction rate and paper strength of the oxygen delignification pulp were discussed. The results showed that the washing degree had a great influence on the viscosity of oxygen delignification pulp， and the strength of paper prepared by the oxygen delignification pulp fully washed， especially the folding resistance， has been greatly improved.
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