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Rio, Jose C. / Laine, Christiane / Potthast, Antje / Takano, Toshiyuki / Theliander, Hans

Holzforschung

International Journal of the Biology, Chemistry, Physics, and Technology of Wood

Editor-in-Chief: Faix, Oskar

Editorial Board Member: Daniel, Geoffrey / Militz, Holger / Rosenau, Thomas / Salmen, Lennart / Sixta, Herbert / Vuorinen, Tapani / Argyropoulos, Dimitris S. / Balakshin, Yu / Barnett, J. R. / Burgert, Ingo / Evans, Robert / Evtuguin, Dmitry V. / Frazier, Charles E. / Fukushima, Kazuhiko / Gindl-Altmutter, Wolfgang / Glasser, W. G. / Holmbom, Bjarne / Isogai, Akira / Kadla, John F. / Koch, Gerald / Lachenal, Dominique / Mansfield, Shawn D. / Morrell, J.J. / Niemz, Peter / Ragauskas, Arthur J. / Ralph, John / Rice, Robert W. / Salin, Jarl-Gunnar / Schmitt, Uwe / Schultz, Tor P. / Sipilä, Jussi / Tamminen, Tarja / Welling, Johannes / Willför, Stefan / Yoshihara, Hiroshi

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Online
ISSN
1437-434X
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Volume 64, Issue 5 (Aug 2010)

Issues

Decomposition of a phenolic lignin model compound over organic N-bases in an ionic liquid

Songyan Jia
  • State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning, PR China
  • Department of Chemical Engineering, The University of Texas at Austin, Austin, TX, USA
/ Blair J. Cox
  • Department of Chemical Engineering, The University of Texas at Austin, Austin, TX, USA
/ Xinwen Guo
  • State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning, PR China
/ Z. Conrad Zhang
  • KiOR Inc., Houston, TX 77573, USA
/ John G. Ekerdt
  • Department of Chemical Engineering, The University of Texas at Austin, Austin, TX, USA
Published Online: 2010-06-30 | DOI: https://doi.org/10.1515/hf.2010.075

Abstract

Lignin depolymerization is a necessary process step in utilizing the carbohydrates in biomass and in potentially converting the lignin into a chemical feedstock. Lignin contains several aryl-alkyl ether linkages and the β-O-4 linkage is dominant among lignins. Base-mediated cleavage of the β-O-4 bond in a lignin model compound, guaiacylglycerol-β-guaiacyl ether, is reported. Ionic liquids have shown promise in a variety of biomass processes and this study explores the potential to use an ionic liquid solvent (1-butyl-2,3-dimethylimidazolium chloride) and non-aqueous bases in cleaving the β-O-4 bond. N-bases of varying basicity and structure were used at temperatures up to 150°C. The cleavage reaction was not found to be catalytic. Among all the tested N-bases, 1,5,7-triazabicyclo[4.4.0]dec-5-ene was the most active, leading to more than 40% β-O-4 ether bond cleavage, and the higher activity is probably associated with the exposed nature of the N-atoms.

Keywords: β-O-4 bond; ionic liquid; lignin model compound; N-base; TBD

About the article

Corresponding author. Department of Chemical Engineering, The University of Texas at Austin, Austin, TX 78712, USA Fax: +1-512-471-7060


Received: 2010-01-12

Accepted: 2010-03-16

Published Online: 2010-06-30

Published Online: 2010-06-30

Published in Print: 2010-08-01


Citation Information: Holzforschung, ISSN (Online) 1437-434X, ISSN (Print) 0018-3830, DOI: https://doi.org/10.1515/hf.2010.075. Export Citation

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