The dehydration of fructose to 5-hydroxymethylfurfural efficiently catalyzed by acidic ion-exchange resin in ionic liquid

• Published in: Bioresource technology 2013-04, Vol.133, p.347-353
• Main Authors: Li, Yuan, Liu, Hui, Song, Changhua, Gu, Xiaomin, Li, Huaming, Zhu, Wenshuai, Yin, Sheng, Han, Changri
• Format: Article
• Language: English
• Subjects: 5-Hydroxymethylfurfural; Acids - pharmacology; Biological and medical sciences; Catalysis - drug effects; catalysts; Chlorides; Dehydration; Dosage; Fructose; Fructose - metabolism; Fundamental and applied biological sciences. Psychology; Furaldehyde - analogs & derivatives; Furaldehyde - metabolism; hydroxymethylfurfural; Imidazoles - pharmacology; ion exchange; Ion Exchange Resins - pharmacology; Ionic liquids; Ionic Liquids - pharmacology; Polymers; Resins; Screening; Solvents - pharmacology; Temperature; Time Factors
• ISSN: 0960-8524; 1873-2976
• DOI: 10.1016/j.biortech.2013.01.038

Macroporous strong-acid resin shows a higher activity than gel strong-acid resin, whose reason is that the molecules of fructose can enter into the inner of macroporous strong-acid resin due to its large porous diameter. [Display omitted] ► 93.0% yield of HMF in the dehydration of fructose was obtained in mild condition. ► The structure of resin has a remarkable effect on the dehydration of fructose. ► ILs with highly branched carbon chain are harmful for the formation of HMF. The efficient dehydration of fructose to 5-hydroxymethylfurfural (HMF) was developed in ionic liquids (ILs) with acidic ion-exchange resins as catalyst. By screening different resins and ILs respectively, it was found that the structure of resins and ILs had a prominent effect on the dehydration of fructose. In 1-butyl-3-methylimidazolium chloride ([Bmim]Cl), D001-cc resin showed a high activity. And then the effects of reaction temperatures, dosages of D001-cc, and different initial fructose loadings on the dehydration of fructose were studied in detail. The system of D001-cc resin and [Bmim]Cl exhibited a constant activity at 75°C for 20min and a 86.2% yield of HMF was obtained after seven recycles. At 75°C for 20min, a 93.0% yield of HMF from the dehydration of fructose was obtained.