热水抽提对麦草碱法制浆性能的影响  

Effects of Hot-Water Extraction on Alkaline Pulping of Wheat Straw

作　　者：张素风[1] 杨恒[1] 

机构地区：[1]陕西科技大学造纸工程学院陕西省造纸技术及特种纸品开发重点实验室,陕西西安710021

出　　处：《纸和造纸》2011年第4期23-25,共3页Paper and Paper Making

基　　金：陕西科技大学科研启动基金(BJ10-14)

摘　　要：在麦草蒸煮之前进行热水抽提,将抽提后的麦草与未抽提的麦草在相同反应条件下进行烧碱–蒽醌法制浆,探讨热水抽提对麦草碱法制浆后浆料性能的影响。热水抽提后麦草的制浆结果表明:抽提后麦草的蒸煮脱木素率提高,卡伯值下降,但是,浆料得率均有不同程度的降低。经过热水抽提,麦草碱法制浆性能提高,可以降低用碱量,缩短蒸煮保温时间。在本实验条件下,热水抽提的较佳工艺条件为:抽提最高温度140℃,升温时间30min,保温时间60min,液比1:10;后续蒸煮的较佳工艺条件为:用碱量12%(以NaOH计),蒸煮最高温度155℃,升温时间90min,保温时间30min,液比1:5。The alkaline pulping properties of wheat straw, which had been extracted with hot water, were studied. In this paper, the process of hot-water extraction at different temperatures, reaction time and other conditions were investigated. The straws extracted or not were made into pulp with NaOH-AQ at the same conditions. Then the effects of extraction on properties of straw pulp were studied. The results indicated that hot-water extraction led to lower Kappa, yield. The pulping of pretreated wheat straw is easier, lower alkaline charge and shorter cooking time are needed. In this experiment, the optimum conditions of Hot-water extraction was： maximum temperature 140℃, heat-up time 30min, time at maximum temperature 60min and liquor ratio 1：10. The optimal conditions for the follow-up cooking was： alkali charge 12%, maximum temperature 155℃, heat-up time 90min, time at maximum temperature 60min.

关 键 词：麦草 半纤维素 热水抽提 碱法制浆 

分 类 号：TS743[轻工技术与工程—制浆造纸工程]