化学
果糖
催化作用
离子液体
单糖
产量(工程)
有机化学
溶剂
咪唑
材料科学
冶金
作者
Mendez Leticia J,Cánepa Alicia,Romanelli Gustavo P,C. L.,Ileana Daniela Lick
标识
DOI:10.1016/j.scp.2024.101576
摘要
Two Brønsted acidic ionic liquids (IL) were synthesized by quaternization of an organic base (imidazole and triethylammonium) with 1,4-butane sultone and its successive protonation with sulfuric acid. After a deep characterization, they were tested, as catalyst and solvent, in the 5-hydroxymethylfurfural production from D-fructose. IL1, [C4SO3Hmim][HSO4], showed the best catalytic activity in the dehydration of fructose, obtaining 58% of 5-HMF. This IL could be recycled and reused without appreciable loss of catalytic activity in four catalytic cycles (58%, 57%, 56%, and 53%, respectively). It was used with other carbohydrates (monosaccharides, disaccharides, and polysaccharides) showing that all substrates containing fructose units were efficiently converted to 5-HMF. Furthermore, a heterogeneous system was prepared with IL1 supported on silica gel, and this system exhibited high activity in the fructose dehydration reaction and a yield of 70% of isolated and purified 5-HMF was achieved.
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