1,4-丁二醇蒸煮法分离玉米秸秆中的木素

Lignin Separation from Corn Stalk Using 1,4-Butanediol

关键词:  1,4-丁二醇  玉米秸秆  木素

Key Words:1,4-butanediol  corn stalk  lignin

摘要:以1,4-丁二醇为试剂,采用高温蒸煮技术分离玉米秸秆中的木素。结果表明,较优的分离条件为：1,4-丁二醇质量分数90%,反应温度160℃,液比1∶10,保温时间1.5 h，硫酸用量0.15 mL/g绝干原料。此条件下木素提取率为89.2%,相对于绝干原料的得率为18.2%。红外光谱分析显示，蒸煮过程中木素官能团没有明显变化,可以保证提取的木素进一步功能化应用。

Abstract:Corn stalk, as the main agricultural residual in China, can be realized the fully utilization of its three main components by developing the lignin separation technology. High boiling solvent of 1,4-butanediol was selected as cooking solvent to separate lignin from corn stalk in this study. The optimal cooking conditions were: 1,4-butanediol 90% (mass fraction), cooking temperature 160℃, solid/liquid ratio 1∶10, time at maximum temperature 1.5 h, dosage of concentrated sulfuric acid 0.15 mL/g (on the oven dried raw material). The highest lignin extraction rate was 89.2%, corresponding to 18.2% on the oven dried raw material. Additionally, no significant change of the functional groups of lignin was verified by FT-IR, it provided the potential for downstream application.