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Effects of Pre-impregnation Soluble Substrates on the Bleaching Performance of Eucalyptus urophylla×E. grandis Mechanical Pulp
Received:September 08, 2022  Revised:November 14, 2022
DOI：10.11981/j.issn.1000-6842.2024.01.27
Key Words:eucalyptus mechanical pulp;bleach;pre-impregnation;soluble substrates
Fund Project:国家自然科学基金重大项目课题（31890771）；江苏省生物质能源与材料重点实验室重点项目（JSBEM-S-202309）；泰山产业领军人才工程专项经费（tscy20200213）。
Author NameAffiliationPostcode
JIAO Jian State Key Lab for Biomass Chemical Utilization， Key Lab of Forest Chemical Engineering， SFA， Jiangsu Provincial Key Lab of Biomass Energy and Material， Institution of Chemical Industry of Forest Products， CAF， Nanjing， Jiangsu Province， 210042
Collaborative Innovation Center for High Efficiency Processing and Utilization of Forestry Resources， Nanjing Forestry University， Nanjing， Jiangsu Province， 210037 		210037
JIAO Ting State Key Lab for Biomass Chemical Utilization， Key Lab of Forest Chemical Engineering， SFA， Jiangsu Provincial Key Lab of Biomass Energy and Material， Institution of Chemical Industry of Forest Products， CAF， Nanjing， Jiangsu Province， 210042
Collaborative Innovation Center for High Efficiency Processing and Utilization of Forestry Resources， Nanjing Forestry University， Nanjing， Jiangsu Province， 210037 		210037
WANG Youcheng Shandong Huatai Paper Co.， Ltd.， Dongying， Shandong Province， 257335 257335
DENG Yongjun* State Key Lab for Biomass Chemical Utilization， Key Lab of Forest Chemical Engineering， SFA， Jiangsu Provincial Key Lab of Biomass Energy and Material， Institution of Chemical Industry of Forest Products， CAF， Nanjing， Jiangsu Province， 210042 210042
ZHU Beiping State Key Lab for Biomass Chemical Utilization， Key Lab of Forest Chemical Engineering， SFA， Jiangsu Provincial Key Lab of Biomass Energy and Material， Institution of Chemical Industry of Forest Products， CAF， Nanjing， Jiangsu Province， 210042 210042
TIAN Qingwen State Key Lab for Biomass Chemical Utilization， Key Lab of Forest Chemical Engineering， SFA， Jiangsu Provincial Key Lab of Biomass Energy and Material， Institution of Chemical Industry of Forest Products， CAF， Nanjing， Jiangsu Province， 210042 210042
HAN Shanming State Key Lab for Biomass Chemical Utilization， Key Lab of Forest Chemical Engineering， SFA， Jiangsu Provincial Key Lab of Biomass Energy and Material， Institution of Chemical Industry of Forest Products， CAF， Nanjing， Jiangsu Province， 210042 210042
FANG Guigan State Key Lab for Biomass Chemical Utilization， Key Lab of Forest Chemical Engineering， SFA， Jiangsu Provincial Key Lab of Biomass Energy and Material， Institution of Chemical Industry of Forest Products， CAF， Nanjing， Jiangsu Province， 210042
Collaborative Innovation Center for High Efficiency Processing and Utilization of Forestry Resources， Nanjing Forestry University， Nanjing， Jiangsu Province， 210037
Shandong Huatai Paper Co.， Ltd.， Dongying， Shandong Province， 257335 		257335
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Abstract:
      To study the effects of pre-impregnation on the bleaching performance of the pulp， Eucalyptus urophyllax E. grandis mechanical pulp was pre-impregnated via three types of pre-impregnation soluble substrates retention processes at three chemical dosages （NaOH 10 kg/t， NaOH 30 kg/t， NaOH 10 kg/t+H2O2 30 kg/t）. The chemical structure of the three pre-impregnation soluble substrates were compared by elemental analysis and pyrolysis-gas chromatography/mass spectrometry. The results showed that the bleaching performances of pre-impregnated pulps using three processes all had a greater improvement than that of eucalyptus single-stage bleaching pulp. Pre-impregnated soluble substrates produced by pre-impregnation treatment with different chemical dosages could have a negative effect on the bleaching properties of pulps to varying degrees with different retention levels. There was a correlation between the degree of nitrogen dissolution from the pulp and the subsequent improvement of bleaching performance of the pulp.
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