Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Ave SE, Minneapolis, MN 55455, USA.
Chem Commun (Camb). 2019 Dec 10;55(99):14942-14945. doi: 10.1039/c9cc07842h.
The stability of zeolite Sn-beta (Sn-β) was greatly improved for glucose isomerization to fructose and fructose yield of 41.5% has been obtained when dioxane/water was used as solvent. The effect of dioxane/water solvent mixtures for fructose dehydration on Amberlyst-131 was also studied and it was found that small amounts of water in dioxane increase the yield of HMF (up to 74%) by limiting the formation of oligomers like difructose anhydride (III). 56% yield of HMF from glucose, maltose, trehalose or cellobiose and 60% from sucrose were produced when hydrolysis of disaccharides, glucose isomerization and fructose dehydration were coupled in a mixture of dioxane/water (5 wt%).
当使用二氧六环/水作为溶剂时，沸石 Sn-beta（Sn-β）的稳定性大大提高，用于葡萄糖异构化为果糖的果糖产率达到 41.5%。还研究了二氧六环/水溶剂混合物对 Amberlyst-131 进行果糖脱水的影响，发现二氧六环中少量的水通过限制二果糖酐（III）等低聚物的形成来增加 5-羟甲基糠醛（HMF）的产量（最高可达 74%）。当将二氧六环/水（5wt%）混合物中的二糖水解、葡萄糖异构化和果糖脱水偶联时，可从葡萄糖、麦芽糖、海藻糖或纤维二糖中得到 56%的 HMF 产率，从蔗糖中得到 60%的 HMF 产率。
