Three novel deep eutectic solvents (DESs) were prepared with choline acetate (ChOAc) as the hydrogen bond acceptor (HBA) and three hydrogen bond donors (HBD): glycolic acid (GlyA), levulinic acid (LevA) and imidazole (Im). They showed different, albeit remarkable capabilities of dissolving lignin (from 35% to 100%) and hemicellulose (from 40% to 50%). The solubility was first tested on commercially available hemicellulose in neat DES and in DES aqueous solution. The high values of solubility observed (22–45 wt%) demonstrated the potential of DESs as hemicellulose solvents. A proof of concept test was carried out on Kraft cellulose: our systems provided selective solubilisation of lignin and hemicellulose leading to cellulose purification, as demonstrated by the lignocellulosic content before and after the DES treatment.

Purification of Kraft cellulose under mild conditions using choline acetate based deep eutectic solvents

Greta Colombo Dugoni;Monica Ferro;Andrea Mele
2020

Abstract

Three novel deep eutectic solvents (DESs) were prepared with choline acetate (ChOAc) as the hydrogen bond acceptor (HBA) and three hydrogen bond donors (HBD): glycolic acid (GlyA), levulinic acid (LevA) and imidazole (Im). They showed different, albeit remarkable capabilities of dissolving lignin (from 35% to 100%) and hemicellulose (from 40% to 50%). The solubility was first tested on commercially available hemicellulose in neat DES and in DES aqueous solution. The high values of solubility observed (22–45 wt%) demonstrated the potential of DESs as hemicellulose solvents. A proof of concept test was carried out on Kraft cellulose: our systems provided selective solubilisation of lignin and hemicellulose leading to cellulose purification, as demonstrated by the lignocellulosic content before and after the DES treatment.
deep eutectic solvents, cellulose, lignin, hemicellulose, choline acetate
File in questo prodotto:
File Dimensione Formato  
Manuscript_2.pdf

accesso aperto

: Pre-Print (o Pre-Refereeing)
Dimensione 652.11 kB
Formato Adobe PDF
652.11 kB Adobe PDF Visualizza/Apri
Manuscript_rev_AM.docx

Accesso riservato

Descrizione: author's accepted manuscript
: Post-Print (DRAFT o Author’s Accepted Manuscript-AAM)
Dimensione 6.01 MB
Formato Microsoft Word XML
6.01 MB Microsoft Word XML   Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11311/1161843
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 17
  • ???jsp.display-item.citation.isi??? 15
social impact