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TCF bleaching of Eucalypt kraft pulp with oxone

机译：环氧乙烷对桉木牛皮纸浆的TCF漂白

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摘要

TCF delignification and bleaching of kraft eucalypt pulp using ozone and oxone under alkaline conditions has been investigated. The pulp samples were bleached in two stages of oxone (Ox) treatment using an AZOx_1Ox_2 sequence. Pulp brightness greater than 84% ISO was achieved. The effects of oxone charge, alkali charge, bleaching temperature and time on the bleaching response were studied. The colour removal was determined from the chromaticity coordinates (L*, a* and b*) and 98% colour removal was achieved. Accelerated ageing experiments showed excellent brightness stability with very little brightness reversion (or thermal degradation) of the oxone treated pulp. Improvements in pulp strengths compared to ozone and acid treatments were achieved along with significant HexA removal demonstrating the feasibility of oxone in TCF bleaching.
机译：已经研究了在碱性条件下使用臭氧和氧杂环丁烷对牛皮纸桉木浆的TCF脱木质素和漂白。纸浆样品使用AZOx_1Ox_2序列在两阶段的oxone（Ox）处理中漂白。纸浆白度大于84％ISO。研究了环氧乙烷的进料量，碱加料量，漂白温度和时间对漂白反应的影响。从色度坐标（L *，a *和b *）确定颜色去除，并且实现98％的颜色去除。加速老化实验显示出优异的亮度稳定性，而经酮处理的纸浆几乎没有亮度回复（或热降解）。与臭氧和酸处理相比，纸浆强度得到了提高，并且HexA的去除量显着增加，这表明了在TCF漂白中使用过氧化氢的可行性。

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