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Wood Research and Technology

Holzforschung

Cellulose – Hemicelluloses – Lignin – Wood Extractives

Editor-in-Chief: Salmén, Lennart

Editorial Board: Daniel, Geoffrey / Militz, Holger / Rosenau, Thomas / Sixta, Herbert / Vuorinen, Tapani / Argyropoulos, Dimitris S. / Balakshin, Yu / Barnett, J. R. / Burgert, Ingo / Rio, Jose C. / 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 / Laine, Christiane / Mansfield, Shawn D. / Morrell, J.J. / Niemz, Peter / Potthast, Antje / Ragauskas, Arthur J. / Ralph, John / Rice, Robert W. / Salin, Jarl-Gunnar / Schmitt, Uwe / Schultz, Tor P. / Sipilä, Jussi / Takano, Toshiyuki / Tamminen, Tarja / Theliander, Hans / Welling, Johannes / Willför, Stefan / Yoshihara, Hiroshi


IMPACT FACTOR 2017: 2.079

CiteScore 2017: 1.94

SCImago Journal Rank (SJR) 2017: 0.709
Source Normalized Impact per Paper (SNIP) 2017: 0.979

Online
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1437-434X
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Volume 66, Issue 6

Issues

Anthraquinone polymer catalysts for alkaline delignification of lignocellulosic matter. Part 3. Delignification of softwood and action on a phenolic β-O-4 lignin model in kraft pulping conditions

Emmanuel Cazeils
  • Laboratoire de Chimie des Polymères Organiques, Université Bordeaux 1, IPB/ENSCBP, 16 Avenue Pey-Berland, F-33607 Pessac Cedex, France
  • Present address: DRT, 30 Rue Gambetta, BP 206, 40105 Dax Cedex, France.
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/ Jackson D. Megiatto Jr
  • Laboratoire de Chimie des Polymères Organiques, Université Bordeaux 1, IPB/ENSCBP, 16 Avenue Pey-Berland, F-33607 Pessac Cedex, France
  • Present address: Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ 85287-1604, USA.
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/ Christian Gardrat
  • Laboratoire de Chimie des Polymères Organiques, Université Bordeaux 1, IPB/ENSCBP, 16 Avenue Pey-Berland, F-33607 Pessac Cedex, France
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/ Frédérique Pichavant
  • Laboratoire de Chimie des Polymères Organiques, Université Bordeaux 1, IPB/ENSCBP, 16 Avenue Pey-Berland, F-33607 Pessac Cedex, France
  • CNRS, Laboratoire de Chimie des Polymères Organiques, F-33607 Pessac Cedex, France
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/ Stéphane Grelier
  • Laboratoire de Chimie des Polymères Organiques, Université Bordeaux 1, IPB/ENSCBP, 16 Avenue Pey-Berland, F-33607 Pessac Cedex, France
  • CNRS, Laboratoire de Chimie des Polymères Organiques, F-33607 Pessac Cedex, France
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/ Alain Castellan
  • Corresponding author
  • Laboratoire de Chimie des Polymères Organiques, Université Bordeaux 1, IPB/ENSCBP, 16 Avenue Pey-Berland, F-33607 Pessac Cedex, France
  • CNRS, Laboratoire de Chimie des Polymères Organiques, F-33607 Pessac Cedex, France
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Published Online: 2012-06-21 | DOI: https://doi.org/10.1515/hf-2011-0255

Abstract

The delignification action of four new anthraquinone (AQ) polystyrene catalysts – three of them linear (CP-A, CP-B, CP-C) and one cross-linked (CP-3D) – were investigated on softwood (Pinus pinaster) chips under kraft pulping conditions, and their catalytic efficiency gains (EGs) were compared to that of AQ, with EGAQ=100. The catalytic EG of the hydrophobic polymers CP-B and CP-3D was 96%, while the inherent hydrophilic catalyst CP-C showed an EG of 30%. Interpretation: hydrogen sulfide anions presented in the kraft pulp liquor might participate in the delignification mechanisms as redox active mediators in the case of the hydrophobic polymers. Moreover, the latter could be recovered after pulping, and delignification tests with the recovered materials revealed that they preserved their catalytic properties. Mechanistic studies were carried out with a phenolic β-O-4 lignin model compound in the presence or absence of glucose (mimicking the carbohydrate end groups) and/or NaSH. It was shown that the cross-linked CP-3D polymer reacted with the lignin model through electron transfer reactions, a process most likely mediated by glucose and HS- redox active species. The concept of grafting AQ into polymeric substrates is discussed in terms of reusable delignification catalysts for large-scale pulping processes under kraft conditions.

Keywords: anthraquinone; electron transfer reactions; kraft pulping; lignin model; polystyrene copolymers; pulping catalysts

About the article

Corresponding author. Laboratoire de Chimie des Polymères Organiques-UMR 5629, Université Bordeaux 1/CNRS, ENSCBP/IPB, Bâtiment A, 16 Avenue Pey-Berland, F-33607 Pessac Cedex, France Phone: +33-5-4000-6280 Fax: +33-5-4000-8487


Received: 2011-12-14

Accepted: 2012-05-30

Published Online: 2012-06-21

Published in Print: 2012-08-01


Citation Information: , Volume 66, Issue 6, Pages 699–704, ISSN (Online) 1437-434X, ISSN (Print) 0018-3830, DOI: https://doi.org/10.1515/hf-2011-0255.

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©2012 by Walter de Gruyter Berlin Boston.Get Permission

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