【摘要】 <正> 草类纤维在我国造纸工业原料中所占的比例在半数以上,而且在相当长的时间内仍会占相当重要的地位。多年来,我国草类制浆方面积累了不少经验,但应该看到,目前的草类制浆,基本上仍沿用木材制浆的基本方法。近年来,我国有关单位开始对草类纤维原料的制浆规律进行了一些研究。草类原料无论在生物结构、化学组成、木素结构等方面都与木材有较大的差别;如何根据草类纤维形态结构、化学组成及木素结构的特征,探索草类制浆的特点及适宜方法,是我国制浆更多还原

【Abstract】 Reaction behaviours of wheat straw soda, soda-AQ, and alkaline sulphite cooking are compared, Patterns-of reaction are investigated, with an aim to determine the most suitable straw pulping method.The investigation shows that the dissolution of lignin can be divided into tree phases during the alkaline cooking (soda-AQ cooking included) of straw. They are the bulk phase of delignification below 100℃, the supplementary phase from 100℃ to 160℃, and the final phase at maximum temperature. It is showa that the "at temperature" period is functionally insignificant on straw pulping.The rate of delignification, in the middle lamella in particular, can be speeded up in soda-AQ cooking. Consequently, fiber separation as a result of digestion is achieved at a much earlier stage. Addition of AQ in soda cooking will markedly decrease in the amount of soda required. However, the longer the cooking time, the less will the effect of AQ be.The alkali-sulphite pulping is one of the best methods for straw, more hemicellulose will be retained, resulting in an increase of 12-13% in yield. Further study on this cooking process and its application is recommended.更多还原