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Study on Ozone Bleaching of Bagasse Oxygen Alkaline Pulp
Received:April 08, 2021  
DOI：10.11980/j.issn.0254-508X.2021.08.005
Key Words:bagasse  oxygen alkaline pulp  ozone bleaching  hydrogen peroxide bleaching  TCF bleaching
Author NameAffiliationPostcode
WU Zudong Yunnan Paper Quality Supervision and Inspection Station， Kunming， Yunnan Province，650034 650034
CHEN Keli* Research Center of Pulp and Paper Engineering， Kunming University of Science and Technology， Kunming， Yunnan Province，650500 650500
ZHU Wei Yunnan Paper Quality Supervision and Inspection Station， Kunming， Yunnan Province，650034 650034
YU Huafeng Yunnan Paper Quality Supervision and Inspection Station， Kunming， Yunnan Province，650034 650034
LIAN Huayang Shandong Papermaking Industry Research & Design Institute， Ji’nan， Shandong Province， 250014 250014
SUN Haimei Shandong Papermaking Industry Research & Design Institute， Ji’nan， Shandong Province， 250014 250014
WU Chuzhu Hubei Forbon Technology Co.， Ltd.， Wuhan， Hubei Province，430200 430200
FAN Qing Ezhou Hydrology and Water Resources Survey Bureau， Ezhou， Hubei Province，436000 436000
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Abstract:In this study， it was explored and optimized the bleaching effects on bagasse oxygen alkaline pulp of clean ozone and oxygen bleaching processes with hydrogen peroxide. It was shown that the ideal ozone bleached bagasse oxygen alkaline pulp could be obtained under the conditions of the pulp concentration of 40%， ozone concentration of 0.9 kg/（min·t） （calculated as absolute dry pulp）， bleaching for 10 min at room temperature， compound acid dosage of 1.5%， and pH value of 2.5. Compared with original oxygen alkaline pulp， the whiteness of ozone bleached bagasse oxygen alkaline pulp increased from 58.6% to 74.5%， with an increase of 15.9 percentage points， and the viscosity of it decreased from 827 mL/g to 780 mL/g， with a decrease of 5.7%. When the viscosity of the pulp basically unchanged， the ozone bleaching pulp obtained under optimum conditions was further bleached with hydrogen peroxide or oxygen enhanced hydrogen peroxide， whose whiteness could be reached more than 80%.
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