荧光增白剂在高得率浆漂白中的两种应用方式探讨

Two Application Modes of Optical Brightening Agent in Peroxide Bleaching of High-yield Pulp

关键词:  高得率浆  荧光增白剂  H₂O₂漂白  松厚度

Key Words:high-yield pulp  OBA  peroxide bleaching  bulk

摘要:介绍了荧光增白剂(OBA)在高得率浆H₂O₂漂白中的两种应用方式，即“漂中加入OBA”和“漂后加入OBA”；探讨高得率浆的“H₂O₂/OBA”漂白工艺与传统H₂O₂漂白工艺的优缺点。结果表明，与高得率浆传统的H₂O₂“化学漂白”相比，这种“H₂O₂/OBA”的“化学/物理”漂（增）白相结合的方式更能保持高得率浆的特性；“漂中加入OBA”的方式要优于“漂后加入OBA”的方式。

Abstract:In this study, two application modes of optical brightening agent (OBA) in peroxide bleaching of HYP, OBA was applied with bleach liquor and OBA was applied after bleaching, were compared. Also, the advantages and disadvantages of peroxide/OBA bleaching and traditional peroxide bleaching were investigated. The results showed that, compared with conventional peroxide bleaching process, the unique properties of HYP could be maintained by both application modes of peroxide/OBA bleaching efficiently. Moreover, the application mode of adding OBA with bleach liquor was better than the counterpart (adding OBA after bleaching).