ASP—AQ法制麦草浆的最佳亚钠用量  

Optimum Na_2SO_3 quantity of AS-AQ process for Wheat-straw Pulping

作　　者：李满祥[1] 李海芳[1] 

机构地区：[1]华南理工大学,510641

出　　处：《纸和造纸》1990年第4期6-7,共2页Paper and Paper Making

摘　　要：碱性亚钠—蒽醌法（简写为ASP—AQ）制麦草浆,具有浆料得率高,滤水性好,强度与硫酸盐浆近似,成本低,易磨浆和减少污染等优点。但是亚钠加入量较少时（如3～5％）,仅起着促进脱木素和保护纤维素和半纤维素降解的添加剂作用,只有加入的亚钠适量才能使SO32-和OH-共同起亲核试剂的积极作用。同时也只有在相适应的蒸煮工艺下优选出最佳的亚钠用量,才能真正发挥ASP—AQ法用麦草浆的优点。关于最佳亚钠用量（即最佳亚硫酸化度）,有的说是0.7～0.8,也有的说0.85最好,0.5最差。我们认为不能笼统地说,必须结合蒸煮曲线和用碱量,在其它条件相对固定的条件下,通过试验来确定。为了说明这个问题,我们进行了实验室小罐蒸煮试验,数据见表1与表2。Alkaline sodium sulfite-anthraquinone (AS-AQ) process is one of the best methods for wheat- straw, but quantity of Na_2SO_3 affects pulping quality greatly. The investigation shows that this quantity of Na_2SO_3 has a optimum rate in the article cooking conditions, it is found that the optimum rate of Na_2SO_3 is 13%. at the moment. The cooking results indicated that utilization fator of Na_2SO_3, yieled and KMnO_4 number Were the best possible. This pulp is used to make cultural papers.

关 键 词：ASP-AQ法 麦草浆 亚钠 用量 

分 类 号：TS749.2[轻工技术与工程—制浆造纸工程]