Effect of four novel bio-based DES (Deep Eutectic Solvents) on hardwood fractionation

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dc.contributor.authorTorres, Paulo
dc.contributor.authorBalcells Fluvià, Mercè
dc.contributor.authorCequier Manciñeiras, Enrique
dc.contributor.authorCanela i Garayoa, Ramon
dc.date.accessioned2020-10-28T08:51:43Z
dc.date.available2020-10-28T08:51:43Z
dc.date.issued2020
dc.date.updated2020-10-28T08:51:49Z
dc.description.abstractUsing the basic principle of construction between a hydrogen bond acceptor (HBA) and a hydrogen bond donor (HBD), four bio-based deep eutectic solvents (DESs) were prepared in a 1:2 molar ratio of HBA:HBD. 2,3-Dihydroxypropyl-1-triethylammonium chloride ([C9H22N+O2]Cl婨 ) was synthesized from raw glycerol and used as an HBA. Lactic acid, urea, pure glycerol, and ethylene glycol were selected as HBD. Attempts to prepare DESs, using citric acid and benzoic acid as HBDs, were unsuccessful. All these DESs were characterized using FTIR and NMR techniques. Besides, physicochemical parameters such as pH, viscosity, density, and melting point were determined. The behavior of these DES to fractionate olive pomace was studied. Lignin recovery yields spanned between 27% and 39% (w/w) of the available lignin in olive pomace. The best DES, in terms of lignin yield ([C9H22N+O2]Cl婨 -lactic acid), was selected to perform a scale-up lignin extraction using 40 g of olive pomace. Lignin recovery on the multigram scale was similar to the mg scale (38% w/w). Similarly, for the holocellulose-rich fractions, recovery yields were 34% and 45% for mg and multi-gram scale, respectively. Finally, this DES was used to fractionate four fruit pruning samples. These results show that our novel DESs are alternative approaches to the ionic liquid:triethylammonium hydrogen sulfate and the widely used DES: choline chloride:lactic acid (1:10 molar ratio) for biomass processing
dc.description.sponsorshipThis work has been partially funded by the Spanish government (CTQ2015-70982-C3-1-R (MINECO/FEDER).
dc.format.mimetypeapplication/pdf
dc.identifier.doihttps://doi.org/10.3390/molecules25092157
dc.identifier.idgrec030551
dc.identifier.issn1420-3049
dc.identifier.urihttp://hdl.handle.net/10459.1/69724
dc.language.isoeng
dc.publisherMDPI
dc.relationinfo:eu-repo/grantAgreement/MINECO//CTQ2015-70982-C3-1-R/ES/APROVECHAMIENTO INTEGRAL DE BIOMASA AGROALIMENTARIA/
dc.relation.isformatofReproducció del document publicat a: https://doi.org/10.3390/molecules25092157
dc.relation.ispartofMolecules, 2020, vol. 25, num. 9, p. 2157
dc.rightscc-by (c) Torres, Paulo et al., 2020
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectExtraction processes
dc.subjectHolocellulose
dc.subjectHydrogen-bond acceptor (HBA)
dc.subjectHydrogen-bond donor (HBD)
dc.subjectIonic liquid (IL)
dc.subjectLignin
dc.subjectLignocellulosic materials
dc.subjectCholine chloride (ChCl)
dc.subjectDeep eutectic solvent (DES)
dc.titleEffect of four novel bio-based DES (Deep Eutectic Solvents) on hardwood fractionation
dc.typeinfo:eu-repo/semantics/article
dc.type.versioninfo:eu-repo/semantics/publishedVersion
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