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Study on APMP Pulping Property of De-oiled Camphor Woodchips
Received:December 18, 2023  
DOI：10.11980/j.issn.0254-508X.2024.05.008
Key Words:camphor woodchips  APMP pulping  physical properties  H2O2 bleaching  COD
Author NameAffiliationPostcode
YIN Hui Engineering Technology Research Center of Yueyang Forest & Paper Co.， Ltd.， Yueyang， Hu’nan Province， 414000 414000
ZHU Hongwei* Engineering Technology Research Center of Yueyang Forest & Paper Co.， Ltd.， Yueyang， Hu’nan Province， 414000 414000
YANG Lu Engineering Technology Research Center of Yueyang Forest & Paper Co.， Ltd.， Yueyang， Hu’nan Province， 414000 414000
LIN Benping School of Chemistry and Chemical Engineering， Changsha University of Science and Technology， Changsha， Hu’nan Province， 410004 410004
LIU Yongfeng Engineering Technology Research Center of Yueyang Forest & Paper Co.， Ltd.， Yueyang， Hu’nan Province， 414000 414000
ZHAO Jing Engineering Technology Research Center of Yueyang Forest & Paper Co.， Ltd.， Yueyang， Hu’nan Province， 414000 414000
DENG Fengwei Engineering Technology Research Center of Yueyang Forest & Paper Co.， Ltd.， Yueyang， Hu’nan Province， 414000 414000
LI Dan Engineering Technology Research Center of Yueyang Forest & Paper Co.， Ltd.， Yueyang， Hu’nan Province， 414000 414000
XIE Zhengwen Engineering Technology Research Center of Yueyang Forest & Paper Co.， Ltd.， Yueyang， Hu’nan Province， 414000 414000
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Abstract:Chemical components of de-oiled camphor woodchips were analyzed. Laboratory and pilot scale trials on APMP pulping properties of de-oiled camphor woodchips were performed.The bleaching property of alkalire H2O2 of de-oiled camphor wood APMP pulp was investigated. The results showed that under the conditions of NaOH dosage 60 kg/t pulp， H2O2 dosage 50 kg/t pulp， temperature 90 ℃ and pulp consistency 25%， physic strengths of camphor wood APMP pulp were higher than eucalypt APMP pulp， but lower than poplar APMP pulp， however its bleachability was lower than both above. In terms of total COD of wastewater， the APMP pulping process of camphor wood was twice that of poplar wood and eucalyptus wood. As the H2O2 dosage of 70 kg/t pulp， camphor pulps could be produced at a brightness level of 75.0% with a yield of 82.5%. Results of pilot trials of camphor woodchips chemimechanical pulping showed that， at the H2O2 dosage of 27 kg/t pulp， camphor woodchips APMP pulps were produced with a brightness of 35.9%. Papers were prepared from camphor woodchips APMP pulp at beating degree of 44.0 °SR， with tensile strength of 28.5 N·m/g and bulk of 2.57 cm3/g， which was acceptable as furnish for mid-high grade of packaging papers.
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