Lignin solubility in non‐imidazolium ionic liquids

Glas, Daan; Doorslaer, Charlie Van; Depuydt, Daphne; Liebner, Falk; Rosenau, Thomas; Binnemans, Koen; Vos, Dirk De

doi:10.1002/jctb.4492

Cited by 67 publications

(32 citation statements)

References 37 publications

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“…Therefore, the ability to separate compound classes within small, characteristic elution windows is a desirable feature. Ionic liquids (IL), with their particular ability to dissolve large quantities of lignin as compared to common solvents, are promising stationary phase materials for separation of decomposed lignin. Armstrong et al .…”

Section: Introductionmentioning

confidence: 99%

Novel Mixed‐Mode Stationary Phases for Chromatographic Separation of Complex Mixtures of Decomposed Lignin

et al. 2017

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Electrochemical degradation of lignin results in a large number of unknown products, formed by both oxidative and reductive decomposition pathways, which have previously been studied by direct mass spectrometry experiments without prior liquid chromatography separation, revealing the presence of many isobaric molecules. In this study, novel phosphonium‐based ionic liquid stationary phases were synthesized and applied in conjunction with high resolution mass spectrometry, to further increase the resolving power of the analytical methodology. The new stationary phases exhibited a wide range of interaction mechanisms in comparison to reversed‐phase materials, and the preliminary results of this proof‐of‐concept study illustrated class‐specific isolation and separation of the major chemical classes of the lignin breakdown products members into very specific retention time windows. For the investigated electrochemically decomposed lignin, the separations revealed predominantly aldehydes and alcohols, and also confirmed the presence of a significant number of isobars.

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Section: Introductionmentioning

confidence: 99%

Novel Mixed‐Mode Stationary Phases for Chromatographic Separation of Complex Mixtures of Decomposed Lignin

et al. 2017

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“…Although the complete dissolution of the whole biomass has been tested [137,138], the selective dissolution of its components has been more frequently proposed. Several ILs have demonstrated their effectiveness for lignin dissolution [139], but imidazolium-based ILs appear as the most representative examples [140][141][142][143][144][145][146][147][148][149]. As lignin can be selectively extracted from lignocellulosic biomass by employment of ILs, new simpler pretreatment methods can be developed for lignin isolation and purification [150,151].…”

Section: Properties Kraft Lignin Lignosulfonate Soda Ligninmentioning

confidence: 99%

Alternatives for Chemical and Biochemical Lignin Valorization: Hot Topics from a Bibliometric Analysis of the Research Published During the 2000–2016 Period

2018

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A complete bibliometric analysis of the Scopus database was performed to identify the research trends related to lignin valorization from 2000 to 2016. The results from this analysis revealed an exponentially increasing number of publications and a high relevance of interdisciplinary collaboration. The simultaneous valorization of the three main components of lignocellulosic biomass (cellulose, hemicellulose, and lignin) has been revealed as a key aspect and optimal pretreatment is required for the subsequent lignin valorization. Research covers the determination of the lignin structure, isolation, and characterization; depolymerization by thermal and thermochemical methods; chemical, biochemical and biological conversion of depolymerized lignin; and lignin applications. Most methods for lignin depolymerization are focused on the selective cleavage of the β-O-4 linkage. Although many depolymerization methods have been developed, depolymerization with sodium hydroxide is the dominant process at industrial scale. Oxidative conversion of lignin is the most used method for the chemical lignin upgrading. Lignin uses can be classified according to its structure into lignin-derived aromatic compounds, lignin-derived carbon materials and lignin-derived polymeric materials. There are many advances in all approaches, but lignin-derived polymeric materials appear as a promising option.

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“…However, ionic liquids (ILs) can be ideal candidates for the formulation of new liquid membranes to be used in lignin separation. Several researchers have investigated the potential of ILs to dissolve, separate and purify lignin [47][48][49][50][51][52][53][54].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Supported Ionic Liquid Membranes and Polymeric Ultrafiltration and Nanofiltration Membranes for Separation of Lignin and Monosaccharides

et al. 2020

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Lignin is one of the three main components of lignocellulosic biomass and must be considered a raw material with attractive applications from an economic and ecological point of view. Therefore, biorefineries must have in mind the most adequate processing to obtain high-quality lignin and the separation tasks that play a key role to improve the purity of the lignin. Separation techniques based on membranes are a promising way to achieve these requirements. In this work, the separation performance of the SILM (Supported Ionic Liquid Membrane) formed with [BMIM] [DBP] as IL (Ionic Liquid) and PTFE as membrane support was compared to a nanofiltration (NF) membrane (NP010 by Microdyn-Nadir) and two ultrafiltration (UF) membranes (UF5 and UF10 by Trisep). The SILM showed selective transport of Kraft lignin, lignosulphonate, xylose, and glucose in aqueous solutions. Although it was stable under different conditions and its performance was improved by the integration of agitation, it was not competitive when compared to NF and UF membranes, although the latter ones suffered fouling. The NF membrane was the best alternative for the separation of lignosulphonates from monosaccharides (separation factors around 75 while SILM attained only values lower than 3), while the UF5 membrane should be selected to separate Kraft lignin and monosaccharides (separation factors around 100 while SILM attained only values below 3).

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Lignin solubility in non‐imidazolium ionic liquids

Cited by 67 publications

References 37 publications

Novel Mixed‐Mode Stationary Phases for Chromatographic Separation of Complex Mixtures of Decomposed Lignin

Novel Mixed‐Mode Stationary Phases for Chromatographic Separation of Complex Mixtures of Decomposed Lignin

Alternatives for Chemical and Biochemical Lignin Valorization: Hot Topics from a Bibliometric Analysis of the Research Published During the 2000–2016 Period

Comparison of Supported Ionic Liquid Membranes and Polymeric Ultrafiltration and Nanofiltration Membranes for Separation of Lignin and Monosaccharides

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