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Study on Ozone Bleaching Process of Oxygen Bleached Eucalyptus Kraft Pulp
Received:December 21, 2021  
DOI：10.11981/j.issn.1000-6842.2023.01.44
Key Words:eucalyptus;kraft pulp;oxygen delignification;ozone;bleaching
Fund Project:国家自然科学基金（32101464）；山东省重点研发计划（2021CXGC010601）；山东省科教产融合创新试点工程（2022JBZ01-05，2022PY057）。
Author NameAffiliationPostcode
GAO Qichao* Key Lab of Biobased Materials and Green Papermaking/Key Lab of Pulp and Paper Science and Technology， Ministry of Education， Qilu University of Technology （Shandong Academy of Sciences）， Ji’nan， Shandong Province， 250353
School of Light Industry and Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 		510640
YANG Guihua Key Lab of Biobased Materials and Green Papermaking/Key Lab of Pulp and Paper Science and Technology， Ministry of Education， Qilu University of Technology （Shandong Academy of Sciences）， Ji’nan， Shandong Province， 250353 250353
ZHANG Kai Key Lab of Biobased Materials and Green Papermaking/Key Lab of Pulp and Paper Science and Technology， Ministry of Education， Qilu University of Technology （Shandong Academy of Sciences）， Ji’nan， Shandong Province， 250353
Shandong Sun Paper Co.， Ltd.， Yanzhou， Shandong Province， 272100
School of Light Industry and Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 		510640
ZHANG Wei Shandong Sun Paper Co.， Ltd.， Yanzhou， Shandong Province， 272100 272100
JI Xingxiang Key Lab of Biobased Materials and Green Papermaking/Key Lab of Pulp and Paper Science and Technology， Ministry of Education， Qilu University of Technology （Shandong Academy of Sciences）， Ji’nan， Shandong Province， 250353 250353
LIU Zehua Shandong Sun Paper Co.， Ltd.， Yanzhou， Shandong Province， 272100 272100
CHEN Jiachuan Key Lab of Biobased Materials and Green Papermaking/Key Lab of Pulp and Paper Science and Technology， Ministry of Education， Qilu University of Technology （Shandong Academy of Sciences）， Ji’nan， Shandong Province， 250353 250353
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Abstract:
      In this study， ozone bleaching technology was introduced into bleaching process of eucalyptus kraft pulp after oxygen delignification treatment. The effects of pulp concentration， bleaching time， pH value， and ozone dosage on the properties of bleached pulp and paper were studied； the optimum bleaching conditions were preliminarily obtained. The results show that when 35% concentration of pulp was used in bleaching process with 0.9% dosage of ozone at pH value of 2.0 for 3 min， bleached pulp with 76.9% ISO brightness was produced， the viscosity and Kappa number were 535 mL/g and 2.71， respectively. Moreover， the as-prepared paper has decent physical properties with tensile index， burst index， tear index， and folding strength of 57.4 N·m/g， 4.77 kPa·m2/g， 7.95 mN·m2/g， and 89 times， respectively.
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