Institute of Environmental Engineering, National Sun Yat-Sen University, Kaohsiung 804, Taiwan.
Key Laboratory for Environmental Toxicology of Haikou, Hainan University, Haikou, Hainan 570228, China.
Bioresour Technol. 2023 Nov;387:129590. doi: 10.1016/j.biortech.2023.129590. Epub 2023 Jul 31.
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 AlCl·6HO with the pineapple stem conversion system resulted in a maximum yield of 61.04% ± 0.55% of 5-HMF. This study also demonstrated that AlCl·6HO and betaine hydrochloride could be effectively reused four times, which indicates a green and effective process.
在这项研究中，不同类型的木质纤维素生物质被用作通过两相反应系统转化为 5-HMF 的底物，该系统由反应相（水相）和萃取相（有机相）组成，在各种金属盐的催化下。深共晶溶剂（DESs）、离子液体[BMIM]Cl、水合氯化胆碱、水合盐酸甜菜碱和盐酸乙胺被用作 DMSO 作为有机溶剂的反应相。菠萝茎在与 DES 的反应中，获得的 5-HMF 的最高产率分别为 ChCl：Lac、ChCl：OA 和 EaCl：Lac 为 40.98%、37.26%和 23.44%。此外，二甲亚砜、盐酸甜菜碱水溶液和 AlCl·6HO 与菠萝茎转化系统的组合，导致 5-HMF 的最大产率为 61.04%±0.55%。本研究还表明，AlCl·6HO 和盐酸甜菜碱可以有效地重复使用四次，这表明该过程是绿色且有效的。
