Alkaline Sulfite- Anthraquinone Pulping of Bagasse

碱性亞硫酸鈉－蒽醌法製取蔗漿

王隆濶(D. L. K. Wang)

《林產工業》 7卷4期 (1988/12) Pp. 43-52

摘要

本試驗採用墨西哥產的蔗渣，去髓後以碱性亞硫酸鈉－蒽醌法來製取化學紙漿。本文主要在研討加入微量的乙醇，不同添加量的蒽醌以及不同比例的碱用藥量對於製漿的影響，在最高溫度175°C保持溫蒸煮20分鐘可以製取高收率，高未漂白度和物理性質非常良好的蔗漿。蒸煮時間雖然短暫，脫木化的程度可以達到非常低的卡巴值，而漿本身沒有發登降解作用且容易漂白。添加微量乙醇會抑制脫木化的進行速率，而提高粗渣率和漿的物理性質。然而未漂白漿在物理性質方面的增高，在漂白後并不太顯著，針對漿的收率，粗渣率以及漿的物理性質而言，亞硫酸鈉對總用碱量的最佳比例為0.75，蒽醌的最適當用量為蔗渣絕乾重量的0.05到0.1%。高白度且強度性質非常良好蔗漿，可以採用氯氣和次氯酸鈉以兩段式或三段式來漂白製取之。

並列摘要

Depithed Mexican bagasse was pulped by using the alkaline sulfiteanthraquinone pulping process. The effects of the addition of small amounts of ethanol and varied amounts of AQ as well as different alkali ratios were investigated. 20 minute cooking time results in pulps with good yields, high brightness and excellent strength properties. Despite of the short cooking time, delignification can be performed to extremely low kappa numbers without pulp degradation which provides and easy bleaching. The addition of a small amount of ethanol retards the delignification rate and increases the rejects and the strength properties of the pulp, but after bleaching the improvement in strength is negligble. With respect to yield, reject content and physical properties of the pulp, the optimum alkali ratio (Na_2SO_3: total alkali) is 0.75 and the favourable amount of AQ is 0.05 to 0.1% based on o.d. bagasse. Pulp bleaching can be done in two or three stages with chlorine or hypochlorite yielding high brightness and good pulp strengths.

並列關鍵字

Bagasse Pulping ； Alkaline Sulfite Anthraquinone Pulping Process ； Ethanol ； AQ Charge ； Alkali Ratio ； Conventional Bleaching