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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. / 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

12 Issues per year


IMPACT FACTOR 2016: 1.868
5-year IMPACT FACTOR: 1.875

CiteScore 2016: 1.83

SCImago Journal Rank (SJR) 2015: 0.817
Source Normalized Impact per Paper (SNIP) 2015: 0.954

Online
ISSN
1437-434X
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Volume 59, Issue 4 (Jul 2005)

Issues

Isolation and fractionation of lignosulfonates by amine extraction and ultrafiltration: A comparative study

Okko Ringena
  • Department of Wood Science and Chemical Wood Technology, University of Hamburg, Hamburg, Germany
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Bodo Saake
  • Federal Research Center of Forestry and Forest Products, Institute of Wood Chemistry and Chemical Technology of Wood, Hamburg, Germany
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Ralph Lehnen
  • Federal Research Center of Forestry and Forest Products, Institute of Wood Chemistry and Chemical Technology of Wood, Hamburg, Germany
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2005-07-05 | DOI: https://doi.org/10.1515/HF.2005.066

Abstract

Spent sulfite liquors (SSLs) were fractionated by two common separation techniques: amine extraction and ultrafiltration. The lignin fractions obtained were characterized with respect to their elemental composition, functional groups and molecular weight distribution. The results of size exclusion chromatography indicate a broad molecular weight distribution of the lignosulfonates (LS). Irrespective of the separation technique used, a small LS fraction with high molecular mass and low degree of sulfonation was obtained, while most of the lignosulfonates have much lower molar masses and a much higher degree of sulfonation. Both separation methods offer the opportunity to extract high-purity LS fractions; however, compared to amine extraction, ultrafiltration provides additional information about the molecular weight distribution of the SSL components without application of other analytical techniques.

Keywords: amine extraction; lignosulfonates; molar mass; molecular weight distribution; size exclusion chromatography; spent sulfite liquor; ultrafiltration

About the article

Corresponding author. Institut für Holzchemie und chemische Technologie des Holzes, Bundesforschungsanstalt für Forst-und Holzwirtschaft, Leuschnerstr. 91, 21031 Hamburg, Germany


Received: November 1, 2004

Accepted: February 4, 2005

Published Online: 2005-07-05

Published in Print: 2005-07-01


Citation Information: Holzforschung, ISSN (Online) 1437-434X, ISSN (Print) 0018-3830, DOI: https://doi.org/10.1515/HF.2005.066.

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