Absorbable Organic Halide Reduction Research in Elemental Chlorine-Free Bleaching of Eucalyptus Kraft Pulp
Absorbable Organic Halide Reduction Research in Elemental Chlorine-Free Bleaching of Eucalyptus Kraft Pulp
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DOI：
10.12783/issn.1544-8053/14/s1/1
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发表时间：
2017
影响因子：
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通讯作者：
Shuangquan Yao;Huixia Zhu Lei Jiang Shuangxi Nie Chengrong Qin Cong Gao-Huixia-Zhu-Lei-Jiang-Shuangxi-Nie-Chengrong-Qin-Gao-114260451;Chen Liang
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文献类型：
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作者：
Shuangquan Yao;Huixia Zhu Lei Jiang Shuangxi Nie Chengrong Qin Cong Gao-Huixia-Zhu-Lei-Jiang-Shuangxi-Nie-Chengrong-Qin-Gao-114260451;Chen Liang
为降低桉木硫酸盐浆AOX的生成，对桉木硫酸盐浆无元素氯（ECF）漂白（D 0 EpD 1）的工艺参数进行了优化。最佳工艺条件为：D 0时，纸浆浓度10%，ClO 2用量2.8%，pH 3.5，温度60°C，时间60 min; Ep时，H2 O2用量1.25%，碱用量2.0%，温度65°C，时间105 min; D1时，ClO 2用量0.2%，pH 4.5，温度60°C，时间55 min。AOX形成量为0.553kg.tp-1，各阶段分别为0.470kg.tp-1、0.060kg.tp-1和0.023kg.tp-1。与优化前相比，AOX生成量降低了23.7%，白度和粘度分别为84.36%ISO、834.6 mL.g-1。事实上，当AOX形成显著下降时，获得了良好的纸浆质量。为减少AOX的产生，实现漂白的清洁化提供了理论依据。
The parameters of elemental chlorine-free (ECF) bleaching (D0EpD1) of eucalyptus kraft pulp were optimized to reduce AOX formation. The optimal conditions were pulp concentration 10%, ClO2 dosage 2.8%, pH 3.5, temperature 60°C, time 60 min at D0; H2O2 dosage 1.25%, alkali dosage 2.0%, temperature 65°C, time 105 min at Ep; ClO2 dosage 0.2%, pH 4.5, temperature 60°C, time 55 min at D1. AOX formation was 0.553 kg.tp–1, each stage was 0.470 kg.tp–1, 0.060 kg.tp–1 and 0.023 kg.tp–1, respectively. Compared with un-optimized AOX formation decreased by 23.7%.The brightness and viscosity was 84.36% ISO, 834.6 mL.g–1. In fact, good quality of the pulp was obtained when AOX formation has fallen dramatically. These provide a theoretical basis for reducing the produce of AOX and realizing the clean bleaching.