Traditional ClO₂ bleaching suffers from numerous side reactions and low reaction efficiency. The synergistic use of H₂O₂ and high-proportion ClO₂ effectively reduces the occurrence of side reactions and the formation of adsorbable organic halogens (AOX). Hence, in this study, we established a bleaching system using H₂O₂ and a high proportion of ClO₂ to produce cellulose. Based on high-proportion ClO₂ pre-impregnation (D_PI), this study investigated the impact of H₂O₂ dosage, reaction temperature, and reaction time on lignin removal. Response surface experiments optimized the bleaching system, increasing pulp brightness from 48.95 % to 81.52 % ISO with a 1.3 % dosage of H₂O₂, 70 min, and 75 °C. Structural analysis showed that a high proportion of ClO₂ activated lignin, facilitating its conversion into quinone or ketone structures, which were subsequently degraded into carboxylic acid compounds by H₂O₂. These findings offer valuable insights into the highly efficient preparation of cellulose substrates.

中文翻译：

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通过与过氧化氢和高比例二氧化氯的协同处理，从甘蔗渣浆中高效制备纤维素


传统的 ClO₂ 漂白存在许多副反应和低反应效率的问题。H₂O₂ 和高比例 ClO₂ 的协同使用有效减少了副反应的发生和可吸附有机卤素 （AOX） 的形成。因此，在这项研究中，我们建立了一种使用 H₂O₂ 和高比例的 ClO₂ 来生产纤维素的漂白系统。本研究基于高比例的 ClO₂ 预浸渍 （D_PI），研究了 H₂O₂ 用量、反应温度和反应时间对木质素去除的影响。响应表面实验优化了漂白系统，在 1.3% 的 H₂O₂ 剂量、70 min 和 75 °C 下，将纸浆亮度从 48.95 % 提高到 81.52 % ISO。 结构分析表明，高比例的 ClO₂ 激活了木质素，促进其转化为醌或酮结构，随后被 H₂O₂ 降解成羧酸化合物。这些发现为纤维素基材的高效制备提供了有价值的见解。