Cited by 31Lignin and Wood ChemistryAdvanced Cellulose Research StudiesBiofuel production and bioconversion

Fractionation of Lignocellulosic Materials with Ionic Liquids. 1. Effect of Mechanical Treatment

Leskinen, Timo, King, Alistair W. T., Kilpeläinen, Ilkka, Argyropoulos, Dimitris S.·2011·Industrial & Engineering Chemistry Research

Abstract

The selective precipitation of wood dissolved in 1-allyl-3-methylimidazolium chloride ([amim]Cl) with a nonsolvent is a straightforward method for fractionating lignocellulosic components. In this study we have solvated and precipitated fractions of pulverized Norway spruce ( Picea abies ) and Eucalyptus grandis wood. This was achieved by agitating and heating the lignocellulosic materials in [amim]Cl followed by precipitation using nonsolvents, such as acetonitrile (MeCN) and water. Water was also used to extract material, which was determined to be high molecular weight galactoglucomannan. Products were analyzed by benzoylation followed by size-exclusion chromatography (SEC) and IR. It was found that the selectivity of precipitation was not significantly dependent upon the chemical composition of the precipitating components. The efficiency of precipitation was found to be dependent upon molecular weight, with the dissolved higher molecular weight and partially soluble wood components precipitating first. Moreover, when coarse sawdust samples were fractionated, the selective dissolution of cellulose from the fiber was observed, which allowed for the regeneration of a fraction of delignified and bleachable cellulose. Additionally, finely milled softwood samples, with demonstrated narrowly distributed low molecular weights, did not efficiently fractionate most likely due to the presence of an extensive lignin–carbohydrate complex (LCC) network.

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Crossref · 10.1021/ie200063x

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  • The functional group of the anion determined the effect on lignin fragmentation rather than its size, while the cation did not play a significant role.

    “The functional group of the anion determined the effect rather than its size, while the cation did not play a significant role.”

    From Deconstruction of lignocellulosic biomass with ionic liquids (2013) · cites this paper as [134]

  • The order of molecular weight reduction of lignins by ionic liquids was sulfates > lactate > acetate > chloride > phosphates.

    “The order of molecular weight reduction was sulfates > lactate > acetate > chloride > phosphates.”

    From Deconstruction of lignocellulosic biomass with ionic liquids (2013) · cites this paper as [134]

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Authors
Leskinen, T., King, A. W. T., Kilpeläinen, I., & Argyropoulos, D. S.
Affiliations
University of Helsinki (FI)
Corresponding author
Argyropoulos, Dimitris S.
Venue
Industrial & Engineering Chemistry Research
Published
2011-10-21
Volume
50
Issue
22
Pages
12349-12357
ISSN
  • 0888-5885 (ISSN-L)
  • 1520-5045
OpenAlex
W2327007122
Cited by
31
References
27
Citations by year
2022: 2 · 2021: 1 · 2019: 2 · 2018: 2 · 2017: 5 · 2016: 2 · 2015: 4 · 2014: 1 · 2013: 10 · 2012: 2
FWCI
2.46
Type
journal article
Language
en
Open access
closed
Locations
Industrial & Engineering Chemistry Research (publishedVersion)
Funders
Tekes
Topics
  • Physical Sciences › Engineering › Biomedical Engineering › Lignin and Wood Chemistry
  • Physical Sciences › Materials Science › Biomaterials › Advanced Cellulose Research Studies
  • Physical Sciences › Engineering › Biomedical Engineering › Biofuel production and bioconversion
Keywords
lignocellulose fractionation, ionic liquids, 1-allyl-3-methylimidazolium chloride, selective precipitation, mechanical treatment, wood dissolution, Norway spruce, Eucalyptus grandis, galactoglucomannan, cellulose dissolution, lignin-carbohydrate complexes, molecular weight distribution, acetonitrile precipitation

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