Efficient conversion of chitosan into 5-hydroxymethylfurfural via hydrothermal synthesis in ionic liquids aqueous solution. (November 2015)

• Record Type: Journal Article
• Authors: Li, Mingguang; Zang, Hongjun; Feng, Jiaxuan; Yan, Qing; Yu, Nianqin; Shi, Xiaolong; Cheng, Bowen
• Is Part Of: Polymer degradation and stability. Volume 121(2015:Nov.)
• Page Start: 331
• Page End: 339
• Publication Date: 2015-11
• Subjects: Chitosan -- Hydrolysis -- 5-Hydroxymethylfurfural -- Ionic liquid -- Hydrothermal synthesis; Polymers -- Deterioration -- Periodicals; Stabilizing agents -- Periodicals; Polymères -- Dégradation -- Périodiques; Stabilisants -- Périodiques; 668.9
• DOI: 10.1016/j.polymdegradstab.2015.09.009
• Languages: English
• ISSNs: 0141-3910

Abstract

Abstract: A new process for the efficient conversion of chitosan into 5-hydroxymethylfurfural (5-HMF) has been developed. Chitosan was hydrolyzed in the presence of acidic ionic liquids (ILs), with N-methyl imidazolium hydrogen sulfate ([MIM]HSO4 ) giving the best results. The effects of reaction time, temperature and quantity of water and IL were investigated in detail. The optimal reaction conditions were found to be 4wt % IL ([MIM]HSO4 ) aqueous solution under hydrothermal condition, 180 °C and a reaction time of 5 h. A yield of 29.5 mol% 5-HMF was obtained from 100 mg chitosan. Furthermore, chitosan with different molecular weight could be directly converted into 5-HMF in good yields under these conditions. More importantly, [MIM]HSO4 could be recovered by simple post-processing and exhibited constant activity over 5 cycles.