Effect of organic solvent and Brønsted acid on 5-hydroxymethylfurfural preparation from glucose over CrCl3
作者： Yan Yang , Wentao Liu , Ningning Wang , Haijun Wang , Zhanxin Song
DOI: 10.1039/C5RA02057C
关键词:
摘要: In the present work, influence of organic solvent on mechanism 5-hydroxymethylfurfural (HMF) preparation from glucose over CrCl3 and role Bronsted acid (N-methyl-2-pyrrolidone hydrogen sulfate ([NMP]HSO4), N-methyl-2-pyrrolidone bromide ([NMP]Br), chlorine ([NMP]Cl), H2SO4, HBr HCl) during reaction were researched by a complementary computational experimental study. It was found that dimethyl sulfoxide (DMSO) gave lowest conversion surrounding CrCl3, forming six-coordinated structure (CrCl3–3DMSO). Glucose in N,N-dimethylformamide (DMF) not selective. N,N-Dimethylacetamide (DMA) n-butyl alcohol exhibited superior selectivity towards HMF glucose. Then different acids DMA expounded. On increasing dosage [NMP]HSO4, decreased. A study HSO4− could also combine with six-coordinate complexes. Addition [NMP]Br [NMP]Cl accelerated generation significantly but didn’t increase yield. An method preliminarily confirmed they mainly responsible for fructose dehydration to HMF. subsequent further verified two kinds ILs had no effect isomerization.
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