离子液体中锡负载蒙脱土催化转化木糖生成糠醛的研究  

Furfural Synthesis from Xylose in Ionic Liquids Using Tin-loaded Montmorillonite as Catalysts

作　　者：菅龙飞 邓昊[1] 韦宛利 李慧玲[1] 陈建峰[1] 任俊莉[1] 

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广东广州510640

出　　处：《造纸科学与技术》2016年第1期1-4,53,共5页Paper Science & Technology

基　　金：国家自然科学基金项目(21576103);广东省自然科学杰出青年基金项目(S20120011250);国家大学生创新创业训练计划项目(201410561090)

摘　　要：糠醛是一种重要的平台化合物。本文以蒙脱土(MMT)为底物,通过离子交换法合成一系列固体酸催化剂(不同金属负载的蒙脱土),并使用不同金属负载蒙脱土为催化剂,在离子液体体系中催化转化木糖生成糠醛。实验探讨了不同金属离子负载的催化剂对木糖催化性能的影响,并考察了离子液体种类、有机助剂种类、反应温度、反应时间对糠醛产率的影响。结果显示:以锡负载的蒙脱土(Sn-MMT)为催化剂,按1:5的体积比使用氯化1-辛基-3-甲基咪唑([OMIM]Cl)和四氢呋喃(THF)作为混合溶剂时,在微波(600 W)150℃下反应5 min后,糠醛产率达到最大值,为54.89%,木糖转化率为95.42%,糠醛选择性为57.52%。本研究对糠醛工艺的优化和改进具有指导作用。Furfural is a crucial platform chemical compound. In the present study,montmorillonite was used as the precursor to synthesize a series of solid acid catalysts（ metal- loaded montmorillonite） via the ion- exchanged approach. Furthermore,metal- loaded montmorillonite was used as the catalyst for the conversion of xylose into furfural in ionic liquids. Experiments were conducted to investigate the influences of the metal ions on the catalytic properties of the prepared catalysts,and the effect of ionic liquids,organic solvents,reaction temperatures and time on the furfural production. Results showed that a highest furfural yield of 54. 89% with 95. 42% xylose conversion efficiency and 57. 52% furfural selectivity could be achieved at 150℃ for 5 min under the microwave irradiation（ 600W） when using tin- loaded MMT（ Sn- MMT） as catalysts and the mixture solvent of 1- octyl- 3- methyl chloride imidazole（ [OMIM]Cl） and tetrahydrofuran（ THF） in the volume ratio of 5： 1. This study offers the useful information for the opimization and development of the furfural production process.

关 键 词：木糖 糠醛 Sn-MMT 固体酸催化剂 离子液体 

分 类 号：TS727[轻工技术与工程—制浆造纸工程]