稻草常压酸水解工艺的研究

研究了稻草常压酸水解工艺,通过单因素实验确定了酸水解适宜的工艺条件,并以还原糖提取率为评价指标,评价了稻草的常压酸水解效果。结果表明,稻草适宜的酸水解工艺条件为:酸水解温度100℃、酸水解时间3 h、质量分数为3%的硫酸、固液比1∶4,在此工艺条件下稻草酸水解得率为73%,还原糖提取率约为17%,多戊糖去除率约为65%;酸水解后的稻草中多戊糖含量为12.2%,用酸水解后稻草生产的人纤浆基本能够达到人纤浆质量标准的要求。

Study on the Atmospheric Acid Hydrolysis of Straw

The single factor experiment was used to investigate the suitable reaction conditions of acid hydrolysis of straw,the result was evaluated by comparing with other hydrolysis technologies.The results showed that the suitable conditions of atmospheric sulfuric acid hydrolysis were as follows: reaction temperature 100℃,reaction time 3 h,sulfuric acid concentration 3%,ratio of solid to liquid(W/V) 1∶4.In the conditions,the hydrolysis yield was 73%,reducing sugar yield could reach 17% approximately,and pentosan removal rate was 65%.Besides,through the preliminary research,it was confirmed that the straw after sulfuric acid hydrolysis could be used to produce rayon pulp.