Eucalyptus sp. is the most important planted crop for the production of chemical pulp. This pulp is mostly bleached with chlorine dioxide, which produces hypochlorous acid in situ when reacting with lignin. However, applying hypochlorus acid directly is not practiced, even though it contributes significantly to the bleaching reactions. Therefore, this article presents hypochlorous acid as the main bleaching chemical for oxygen delignified Eucalyptus sp. kraft pulp. The results showed that hypochlorous acid solely decreased the kappa number of the pulp more efficiently than chlorine dioxide did, without increasing the content of adsorbable organic halogens (AOX) in the effluent. The bleaching sequence with hypochlorous acid, ozone and hydrogen peroxide produced fully bleached pulps, with low organically bound halogens (OX) and aerobically digestible effluents. The bleached pulps and digested effluents complied with international standards for the pulp industry. The hypochlorous acid bleaching sequence is appealing because it is short, uses mild conditions and requires less or similar energy to produce the bleaching chemicals than comparable ECF bleaching sequences from literature.

桉树 是生产化学纸浆的最重要的种植作物。这种纸浆大多用二氧化氯漂白，二氧化氯与木质素反应时原位产生次氯酸。然而，不直接使用次氯酸，即使它对漂白反应有显着影响。因此，本文提出了次氯酸作为氧脱木素桉树的主要漂白化学品。牛皮纸浆。结果表明，次氯酸单独降低纸浆的卡伯值比二氧化氯更有效，而不会增加流出物中可吸附有机卤素 (AOX) 的含量。使用次氯酸、臭氧和过氧化氢的漂白顺序产生了完全漂白的纸浆，有机结合卤素 (OX) 和需氧可消化流出物含量低。漂白纸浆和消化废水符合纸浆行业的国际标准。次氯酸漂白序列很有吸引力，因为它很短，使用温和的条件，与文献中的可比 ECF 漂白序列相比，它需要更少或相似的能量来生产漂白化学品。