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Effect of Metal Ion and Non-silicon Stabilizer on the Stability of Hydrogen Peroxide in Chemi-mechanical Pulp Bleaching Process
Received:March 19, 2024  
DOI：10.11980/j.issn.0254-508X.2024.09.013
Key Words:metal ions  non-silicon stabilizer  chelate value  residual H2O2 content  bleaching effect
Author NameAffiliationPostcode
LIU Xiaoxiao Zhejiang Transfar Whyyon Chemical Co.， Ltd.， Hangzhou， Zhejiang Province， 311231 311231
XIE Qingyu Zhejiang Transfar Whyyon Chemical Co.， Ltd.， Hangzhou， Zhejiang Province， 311231 311231
YANG Lei Zhejiang Transfar Whyyon Chemical Co.， Ltd.， Hangzhou， Zhejiang Province， 311231 311231
ZHA Wangmin Zhejiang Transfar Whyyon Chemical Co.， Ltd.， Hangzhou， Zhejiang Province， 311231 311231
WU Xiaomin Zhejiang Transfar Whyyon Chemical Co.， Ltd.， Hangzhou， Zhejiang Province， 311231 311231
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Abstract:The effects of five metal ions （Ca2+， Mg2+， Fe3+， Cu2+ ，and Mn2+） and six non-silicon stabilizers on residual H2O2 content in chemi-mechanical pulp bleaching process were studied. The results showed that Ca2+ and Mg2+ could increase the residual H2O2 content， while Fe3+，Cu2+， and Mn2+ reduced the residual H2O2 content significantly. The calcium and iron chelation values of hydroxyethyl diphosphonic acid （HEDP） were the highest in non-silicon stabilizer， with calcium chelation value of 434.0 mg/g and iron chelation value of 243.6 mg/g. Diethylenetriamine pentamethylene phosphonic acid （DTPMP） could effectively inhibit the ineffective decomposition of H2O2 in the bleaching process， the residual H2O2 content was up to 4.0%， and the whiteness of the pulp was 69.9%，when Mn2+ mass concentration was 1 mg/kg.
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