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Sodium Hydroxide Dosage Optimization for Chemi-mechanical Pulp Bleaching Process
Received:October 28, 2023  
DOI：10.11980/j.issn.0254-508X.2024.04.022
Key Words:chemi-mechanical pulp  bleaching  pulp qualities  dosage optimization of sodium hydroxide
Fund Project:山东省重点研发计划资助（2022SFGC0101）；泰山产业领军人才工程资助。
Author NameAffiliationPostcode
WANG Hui Shandong Huatai Paper Co.， Ltd.， Dongying， Shandong Province， 257335 257335
MA Xiaoqing Shandong Huatai Paper Co.， Ltd.， Dongying， Shandong Province， 257335 257335
ZHANG Fengshan Shandong Huatai Paper Co.， Ltd.， Dongying， Shandong Province， 257335
Shandong Yellow Triangle Biotechnology Industry Research Institute Co.， Ltd.， Dongying， Shandong Province， 257399 		257399
WU Weiran Shandong Huatai Paper Co.， Ltd.， Dongying， Shandong Province， 257335 257335
ZHOU Jingpeng Shandong Huatai Paper Co.， Ltd.， Dongying， Shandong Province， 257335 257335
MA Houyue Shandong Huatai Paper Co.， Ltd.， Dongying， Shandong Province， 257335 257335
LIU Yanshao* Shandong Huatai Paper Co.， Ltd.， Dongying， Shandong Province， 257335
Shandong Yellow Triangle Biotechnology Industry Research Institute Co.， Ltd.， Dongying， Shandong Province， 257399 		257399
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Abstract:The optimum dosage of sodium hydroxide in bleaching section of poplar chemi-mechanical pulp was studied. When the mass ratio of hydrogen peroxide and sodium hydroxide was 1∶1， the whiteness of pulp was the highest. To improve the strength index of chemi-mechanical pulp， the dosage of sodium hydroxide should be appropriately increased. To improve the bulk and opacity， the dosage of sodium hydroxide should be reduced， in order to prevent the chemi-mechanical pulp from yellowing after a period of time in the pulp storage tower， the residual hydrogen peroxide in the chemi-mechanical pulp should be more than 10% total usage of the hydrogen peroxide in the bleaching section. According to the test results， the bleaching process of chemi-mechanical pulp production line was adjusted and optimized， and the pulp quality reached the expected effect.
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