Abstract
Key features of the deep eutectic solvent-microwave assisted simultaneous extraction of polyphenols and delignification pretreatment of chestnut shell waste are presented.
Highlights
Microwave (MW) assisted chemical processes are nowadays a mature and well-established research field
The partial least squares regression (PLS) analysis of the solid residues obtained after extraction in water for 30 min at 65 °C (23.1 ± 0.9% hemicellulose, 38.5 ± 1.9% cellulose, 19.3 ± 0.8% lignin) or Choline Chloride (ChCl)–oxalic acid (23.8 ± 1.1%, hemicellulose, 39.0 ± 1.9% cellulose, 19.2 ± 1.1% lignin) highlighted that these solvents are less efficient for the delignification of biomasses, given that these values are very close to those determined in raw chestnut shell waste (CSW)
The yield of polyphenols isolated from CSW by the MWDA extraction process was substantially improved using a ChCl– oxalic acid dihydrate deep eutectic solvents (DESs) in comparison to other acid-based ChCl DESs
Summary
Microwave (MW) assisted chemical processes are nowadays a mature and well-established research field.
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