H-ZSM-5分子筛在H2O-四氢呋喃/2-丁醇/2-甲基四氢呋喃反应体系中催化葡萄糖转化制备5-羟甲基糠醛（英文）

Enhanced HMF yield from glucose with H-ZSM-5 catalyst in water–tetrahydrofuran/2-butanol/2-methyltetrahydrofuran biphasic systems

在本文中,H2O?四氢呋喃、H2O?2-丁醇、H2O?2-甲基四氢呋喃三种廉价的双相反应体系被发现并证实可以高效地促进H-ZSM-5分子筛催化葡萄糖转化制备5-羟甲基糠醛(HMF).为了在三种反应体系中获得最佳的HMF产率,研究了包括反应温度、反应时间、催化剂用量、有机相体积以及无机盐种类在内的不同反应参数对HMF产率的影响.研究发现,最佳反应条件下,H-ZSM-5分子筛催化葡萄糖转化制备HMF在H2O-四氢呋喃、H2O-2-丁醇、H2O?2-甲基四氢呋喃三种体系中分别可获得高达61%、59%以及50%的产率.这些结果证实上述三种高效的反应体系可以实现对昂贵的离子液体反应体系进行替代.而且更重要的是,在上述三种反应体系中,H-ZSM-5分子筛在经历多次循环使用后依然可以保持催化活性和物质结构的稳定性.因此我们相信,本文中所呈现的高效、廉价的催化体系在HMF的实际生产过程中将会具有极大的应用前景.

With the aim of achieving a high 5-hydroxymethylfurfural(HMF)yield from glucose with H-ZSM-5 catalyst at low cost,three inexpensive biphasic reaction systems,H2O?tetrahydrofuran(THF),H2O?2-methyltetrahydrofuran(MeTHF)and H2O?2-butanol,were discovered and proved to be particularly effective in promoting the formation of HMF from glucose over H-ZSM-5 zeolite.In order to determine the optimal process conditions,the effects of various experimental variables,such as reaction temperature,reaction time,catalyst dosage,volume of organic solvent,as well as inorganic salt type on glucose conversion to HMF in three systems were investigated in detail.It was found that under optimal reaction conditions,H2O?THF,H2O?2-butanol and H2O?MeTHF allowed the glucose dehydration process to achieve HMF yields of up to 61%,59%,and 50%,respectively.Moreover,in the three biphasic systems,the H-ZSM-5 catalyst was also demonstrated to maintain excellent stability.Thus,the catalytic approach proposed in this paper can be believed to have potential prospects for industrially efficient and low-cost production of HMF.