碱法麦草浆低氯漂白工艺

Study on Less Chlorine Bleaching Technology of Alkaline Wheat Straw Pulp

对碱法麦草浆由酸性硝酸钠进行漂前预处理的工艺条件进行了优化，并对由酸性硝酸钠做预处理段（N 段）的几种低氯漂白工艺流程进行了探讨。研究表明，碱法麦草浆经酸性硝酸钠预处理后，有约 55％ 的残余木素溶出且粘度良好，可取代传统 CEH 三段漂中的氯化段。采用 NEH 和 NH 漂程可在较低用氯量下，将碱法麦草浆漂至 70％ ISO 以上的白度。采用 N-NaClO2-P 漂程可以把碱法麦草浆漂到接近 80％ ISO 白度，且白度稳定性好，污染程度小。

A study of less chlorine bleaching technology of soda－AQ wheat straw pulp was presented． It is suitable for Chinese pulp and papermaking industry． The research work mainly included acidic nitrate of soda pretreatment of soda－AQ pulp，alkaline extraction of pretreated pulp，a less chlorine bleaching technology of the pulp pretreated by the combination of acidic nitrate of soda，alkali and the characteristics of different less chlorine bleaching sequences．