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Publication Date:
May 2011
ISSN:
1437-434X
DOI:
10.1515/hf.2011.094

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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. / Berry, Richard / Burgert, Ingo / Evans, Robert / Evtuguin, Dmitry V. / Frazier, Charles E. / Fukushima, Kazuhiko / Gellerstedt, Göran / Gindl-Altmutter, Wolfgang / Glasser, W. G. / Heitner, Cyril / Holmbom, Bjarne / Isogai, Akira / Kadla, John F. / Kleen, Marjatta / Koch, Gerald / Lachenal, Dominique / Mansfield, Shawn D. / Morrell, J.J. / Niemz, Peter / Pizzi, Antonio / Ragauskas, Arthur J. / Ralph, John / Rice, Robert W. / Salin, Jarl-Gunnar / Schmitt, Uwe / Schultz, Tor P. / Schwanninger, Manfred / Sipilä, Jussi / Tamminen, Tarja / Viikari, Liisa / Welling, Johannes / Willför, Stefan / Yoshihara, Hiroshi

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Increased IMPACT FACTOR 2011: 1.748
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Rank 2 out of 21 in category Materials Science, Paper & Wood and 10 out of 59 in category Forestry in the 2011 Thomson Reuters Journal Citation Report/Science Edition.

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Dissolution of dissolving pulp in alkaline solvents after steam explosion pretreatments

11th EWLP, Hamburg, Germany, August 16–19, 2010
1 / Ola Wallberg2 / Lars Stigsson3 / Ulf Germgård1

1Department of Chemical Engineering, Karlstad University, Karlstad, Sweden

2Department of Chemical Engineering, Lund University, Lund, Sweden

3KIRAM AB, Bjärred, Sweden

Corresponding author. Department of Chemical Engineering, Karlstad University, Universitetsgatan 2, SE-651 88 Karlstad, Sweden

Citation Information: Holzforschung. Volume 65, Issue 4, Pages 613–617, ISSN (Online) 1437-434X, ISSN (Print) 0018-3830, DOI: 10.1515/hf.2011.094, May 2011

Publication History:
Received:
2010-10-29
Accepted:
2011-04-12
Published Online:
2011-05-29

Abstract

In this project different aqueous based solvent systems were investigated for the dissolution of steam exploded (STEX) dissolving pulps prior to a coagulation step for preparation of textile fibers. The pulp samples studied could, to a large degree, be dissolved in a NaOH/urea/thiourea system, but there are always residuals, irrespective of the conditions. The dissolution process appeared to be kinetically controlled, as prolonged retention time decreased the amount of residuals. A pre-cooled NaOH/urea/thiourea system, and a retention time of 60 h generated the lowest amount (6%) of residuals of the STEX pretreated dissolving pulp studied. Some fundamental results are described and a model for dissolution of dissolving pulp fibers is proposed.

Keywords: alkaline solvent systems; cellulose; dissolution; steam explosion

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