Highly effective synthesis of 5-hydroxymethylfurfural from lignocellulosic biomass over a green and one-pot reaction in biphasic system

• Published in: Bioresource technology 2023-11, Vol.387, p.129590-129590, Article 129590
• Main Authors: Huynh, Quang Tam, Zhong, Chong-Ting, Huang, Qing, Lin, Yuan-Chung, Chen, Ku-Fan, Liao, Chien-Sen, Dong, Cheng-Di, Chang, Ken-Lin
• Format: Article
• Language: English
• Subjects: 5-Hydroxymethylfurfural; Betaine hydrochloride; Biphasic systems; Deep eutectic solvents; Platform chemicals
• ISSN: 0960-8524; 1873-2976
• DOI: 10.1016/j.biortech.2023.129590

[Display omitted] •The high yield of 5-HMF (61%) confirmed the effectiveness of the DESs basedbiphasic system.•BHC can replace traditional acid catalysts and ionic liquids because it is non-toxic and inexpensive.•AlCl3·6H2O and BHC could be effectively reused four times.•CrCl3 conjunction with BHC is a novel and promising strategy for the 5-HMF production from LCB. In this study, different types of lignocellulosic biomas were used as substrates for the conversion to 5-HMF via biphasic reaction system that is composed of a reaction phase (aqueous phase) and an extraction phase (organic phase) under the catalysis of various metal salts. Deep eutectic solvents (DESs), ionic liquid [BMIM]Cl, aqueous choline chloride, aqueous betaine hydrochloride, and ethylamine hydrochloride were used as the reaction phase in the combination of dimethyl sulfoxide (DMSO) as organic solvents. The highest yields of 5-HMF obtained from pineapple stems in reactions with DES were 40.98%, 37.26%, and 23.44% for ChCl:Lac, ChCl:OA, and EaCl:Lac, respectively. Moreover, the combination of dimethyl sulfoxide, betaine hydrochloride aqueous solution, and AlCl3·6H2O with the pineapple stem conversion system resulted in a maximum yield of 61.04% ± 0.55% of 5-HMF. This study also demonstrated that AlCl3·6H2O and betaine hydrochloride could be effectively reused four times, which indicates a green and effective process.