玉米秸秆中半纤维素的水热法-碱法联合提取工艺

摘要

采用正交试验分析手段，研究了玉米秸秆中半纤维素的水热法和碱法联合提取工艺。实验结果表明：水热法的最佳提取工艺条件为温度170℃、保温时间30 min、固液比1∶15，该条件下提取率为32．21％；碱法的最佳工艺条件为碱浓度10％、温度75℃、固液比1∶20，提取率为40．18％。将两种方法联合应用后，获到半纤维素的总提取率为67．72％。%The extraction process for extracting hemicellulose from corn stalks of water-soluble combined with alkali-soluble is studied by using orthogonal test analysis methods.The results show that:the optimum extraction conditions of the hydrothermal method is the temperature 170 ℃,holding time of 30min,solid-liquid ratio 1 ∶15, and the extraction rate under this condition is 32.21%.The optimum conditions for the alkali-soluble is that the alkali concentration 10%,temperature 75℃,solid-liquid ratio 1 ∶20,the extraction rate is 40.18%.After the combination of the two methods,the hemicellulose total extraction rate of 67.72%can be obtained.