摘要
采用离子液体1-丁基-3-甲基咪唑氯盐和1-磺丙基-3-甲基咪唑硫酸氢盐分别作为溶剂和催化剂,先将纤维素进行均相水解,然后用甲酸作为氢源,通过催化加氢的方法制备2,5-二甲基呋喃(DMF).根据标准样品的紫外吸收光谱和朗伯比尔定律,建立DMF的定量和定性分析方法,筛选适宜的DMF制备条件.结果表明,在甲酸浓度为2mol·kg^-1,反应温度为343K和时间为12h的条件下,DMF的产率达到最大值41.2%.与传统方法相比,离子液体的使用增强了体系的稳定性,降低了有机溶剂的比重,反应过程更加绿色环保.
The ionic liquids of 1-butyl-3-methylimidazolium chloride and 1-sulfopropyl-3-methylimidazolium hydrogensulfate were used as solvents and catalysts respectively to hydrolyze cellulose. Then using formic acid as hydrogen source, 2,5-dimethylfuran(DMF) was prepared by catalytic hydrogenation.According to the UV absorption spectrum of the standard samples and Lambert Beer’s law,quantitative and qualitative analysis methods for DMF were established to select suitable DMF preparation conditions. The results showed that when the concentration of formic acid was 2 mol·kg^-1 , the reaction temperature was 343 K and the time was 12 h, the yield of DMF reached a maximum of 41.2%. Compared with the traditional method, the use of ionic liquid enhanced the stability of the system, reduced the specific gravity of the organic solvent, and the reaction process was greener.
作者
郑勇
郑永军
田大勇
侯绍刚
ZHENG Yong;ZHENG Yongjun;TIAN Dayong;HOU Shaogang(Department of Chemical and Environmental Engineering,Anyang Institute of Technology,Anyang 455000,China)
出处
《轻工学报》
CAS
2019年第3期28-33,共6页
Journal of Light Industry
基金
国家自然科学基金项目(21406002)
河南省科技计划项目(182102210199)
河南省高等学校青年骨干教师培养计划项目(2017GGJS175)
