New deep eutectic solvent assisted extraction of highly pure lignin from maritime pine sawdust (Pinus pinaster Ait.).
Int J Biol Macromol
; 177: 294-305, 2021 Apr 30.
Article
en En
| MEDLINE
| ID: mdl-33607141
ABSTRACT
Lignocellulosic biomass is a renewable and sustainable feedstock, mainly composed of cellulose, hemicellulose, and lignin. Lignin, as the most abundant natural aromatic polymer occurring on Earth, has great potential to produce value-added products. However, the isolation of highly pure lignin from biomass requires the use of efficient methods during lignocellulose fractionation. Therefore, in this work, novel acidic deep eutectic solvents (DESs) were prepared, characterized and screened for lignin extraction from maritime pine wood (Pinus pinaster Ait.) sawdust. The use of cosolvents and the development of new DES were also evaluated regarding their extraction and selectivity performance. The results show that an 1â¯h extraction process at 175⯰C, using a novel DES composed of lactic acid, tartaric acid and choline chloride, named LactTartChCl, in a molar ratio of 411, allows the recovery of 95â¯wt% of the total lignin present in pine biomass with a purity of 89â¯wt%. Such superior extraction of lignin with remarkable purity using a "green" solvent system makes this process highly appealing for future large-scale applications.
Palabras clave
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Tartratos
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Madera
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Colina
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Ácido Láctico
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Pinus
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Lignina
Idioma:
En
Revista:
Int J Biol Macromol
Año:
2021
Tipo del documento:
Article
País de afiliación:
Portugal