High-purity lignin isolated from poplar wood meal through dissolving treatment with deep eutectic solvents.
TL;DR: From Fourier Transform-IR, nitrobenzene oxidation and nuclear magnetic resonance analysis, the results demonstrate that the DESs can selectively cleave ether linkages and damage the non-condensation section of lignin, thereby facilitating lignIn dissolution from wood meal, providing a promising route for the extraction of high-purity lign in from biomass materials.
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Abstract: Deep eutectic solvents (DESs) have potential applications in biomass conversion and green chemicals due to their cost-effectiveness and environmentally friendly properties. This study reports on a feasible method of using DESs for lignin selective extraction from poplar wood meal. DESs obtained from various hydrogen-bond donors and acceptors were used to evaluate the dissolving capacity of lignin from poplar wood meal. Among the various DESs, lactic acid: choline chloride (9 : 1) exhibits the optimal extraction capacity, which is capable of selectively dissolving 95% of lignin from poplar wood meal at 120°C for 6 h. The purity of isolated lignin reaches 98% after regeneration in water. From Fourier Transform-IR, nitrobenzene oxidation and nuclear magnetic resonance analysis, the results demonstrate that the DESs can selectively cleave ether linkages and damage the non-condensation section of lignin, thereby facilitating lignin dissolution from wood meal. Thus, this study provides a promising route for the extraction of high-purity lignin from biomass materials.
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Citations
Pretreatment of lignocellulosic biomass: A review on recent advances.
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Lignin as a potential source of high-added value compounds: A review
Luis Alberto Zevallos Torres,Adenise Lorenci Woiciechowski,Valcineide Oliveira de Andrade Tanobe,Susan Grace Karp,Luiza Chemim Guimarães Lorenci,Craig B. Faulds,Carlos Ricardo Soccol +6 more
TL;DR: In this paper, a review article assesses these investigations into the different applications/uses of lignin, together with the main resulting products and information is provided about the analytical methods used to characterize it.
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Deep Eutectic Solvents for Pretreatment, Extraction, and Catalysis of Biomass and Food Waste.
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227
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