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金属离子及非硅稳定剂对化学机械浆漂白过程中过氧化氢稳定性的影响 |
Effect of Metal Ion and Non-silicon Stabilizer on the Stability of Hydrogen Peroxide in Chemi-mechanical Pulp Bleaching Process |
收稿日期:2024-03-19 |
DOI:10.11980/j.issn.0254-508X.2024.09.013 |
关键词: 金属离子 非硅稳定剂 螯合值 残余H2O2含量 漂白效果 |
Key Words:metal ions non-silicon stabilizer chelate value residual H2O2 content bleaching effect |
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摘要:本研究主要探讨了Ca2+、Mg2+、Fe3+、Cu2+、Mn2+ 5种金属离子和6种非硅稳定剂对化学机械浆漂白过程中残余H2O2含量的影响。结果表明,Ca2+、Mg2+可以提高残余H2O2含量,Fe3+、Cu2+、Mn2+降低了残余H2O2含量,且降幅明显。非硅稳定剂中羟基亚乙基二膦酸(HEDP)的钙铁螯合值最大,钙螯合值为434.0 mg/g,铁螯合值为243.6 mg/g。当Mn2+质量浓度为1 mg/kg时,二乙烯三胺五亚甲基膦酸(DTPMP)在漂白过程中能够很好地抑制H2O2的无效分解,残余H2O2含量最高为4.0%,浆料白度最好为69.9%。 |
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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