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

Bioresour Technol. 2023 Nov:387:129590. doi: 10.1016/j.biortech.2023.129590. Epub 2023 Jul 31.

Abstract

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.

Keywords: 5-Hydroxymethylfurfural; Betaine hydrochloride; Biphasic systems; Deep eutectic solvents; Platform chemicals.

MeSH terms

  • Betaine*
  • Biomass
  • Dimethyl Sulfoxide*
  • Solvents
  • Water

Substances

  • lignocellulose
  • Dimethyl Sulfoxide
  • Betaine
  • 5-hydroxymethylfurfural
  • Solvents
  • Water