Extraction of lignins from aqueous–ionic liquid mixtures by organic solvents
Abstract
The commercial development of ionic liquids (ILs) to pretreat lignocellulose by dissolution of whole biomass and cellulose precipitation by addition of water is hindered by the absence of an effective technique to recover the lignin content of the biomass from the IL. Three organic solvents [ethyl acetate, 1,4‐dioxane, and tetrahydrofuran (THF)] were studied for their ability to form a two‐liquid‐phase system with water and 1‐ethyl‐3‐methylimidazolium acetate ([C 2 mim][OAc]), and for partitioning model lignins and lignin monomers between the two liquid phases. Ternary diagrams were obtained for three [C 2 mim][OAc]/organic solvent/water systems at 22°C. Partition coefficients were measured for several types of lignin in these three systems. Partition coefficients increase with rising water content in the IL phase, and depend strongly on the type of lignin and on the organic solvent. Partition coefficients rise as the pH of the ionic‐liquid‐rich phase falls. Small molecule model lignin monomer compounds (guaiacol, syringaldehyde) are also readily extracted from the IL/water system by THF. Biotechnol. Bioeng. 2012; 109:346–352. © 2011 Wiley Periodicals, Inc.
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The savings in grinding energy were shown to be due to the lubricating properties of ionic liquids, rather than partial modification of the lignocellulose matrix.
“The savings were shown to be due to the lubricating properties of ionic liquids, rather than partial modification of the lignocellulose matrix.”
From Deconstruction of lignocellulosic biomass with ionic liquids (2013) · cites this paper as [187]
A recent study shows that ionic liquids could help to reduce the energy input for grinding wood-derived lignocellulose.
“A recent study shows that ionic liquids could help to reduce the energy input for grinding wood-derived lignocellulose.”
From Deconstruction of lignocellulosic biomass with ionic liquids (2013) · cites this paper as [187]
The non-baseline power consumption for grinding pine chips was significantly reduced (up to 75%), while a finer powder was obtained, by adding the ionic liquid before the grinding.
“The non-baseline power consumption for grinding pine chips was significantly reduced (up to 75%), while a finer powder was obtained, by adding the ionic liquid before the grinding.187”
From Deconstruction of lignocellulosic biomass with ionic liquids (2013) · cites this paper as [187]
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Catalytic Transformation of Lignin for the Production of Chemicals and Fuels
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Deconstruction of lignocellulosic biomass with ionic liquids
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- Authors
- Xin, Q., Pfeiffer, K., Prausnitz, J. M., Clark, D. S., & Blanch, H. W.
- Affiliations
- East China University of Science and Technology (CN)
- Energy Biosciences Institute (US)
- Corresponding author
- Blanch, Harvey W.
- Venue
- Biotechnology and Bioengineering
- Publisher
- Wiley
- Published
- 2011-11-21
- Volume
- 109
- Issue
- 2
- Pages
- 346-352
- ISSN
- 0006-3592 (ISSN-L)
- 1097-0290
- OpenAlex
- W2082077158
- Cited by
- 37
- References
- 16
- Citations by year
- 2026: 1 · 2025: 2 · 2024: 1 · 2022: 1 · 2021: 2 · 2020: 4 · 2019: 2 · 2017: 1 · 2016: 1 · 2015: 5 · 2014: 6 · 2013: 7 · 2012: 4
- FWCI
- 2.38
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Biotechnology and Bioengineering (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Chemical Engineering › Catalysis › Ionic liquids properties and applications
- Physical Sciences › Engineering › Biomedical Engineering › Lignin and Wood Chemistry
- Physical Sciences › Chemical Engineering › Filtration and Separation › Chemical and Physical Properties in Aqueous Solutions
- Keywords
- lignin extraction, ionic liquids, 1-ethyl-3-methylimidazolium acetate, lignocellulosic biomass pretreatment, organic solvents, two-phase liquid systems, partition coefficient, lignin monomers, guaiacol, syringaldehyde, tetrahydrofuran, 1,4-dioxane, ethyl acetate, ternary phase diagram, pH effect
- MeSH terms
- Acetates, Poaceae, Hydrogen-Ion Concentration, Lignin, Solvents, Water, Biomass, Ionic Liquids, Biofuels
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