, Volume 20, Issue 4, pp 1547–1561 | Cite as

Novel concepts of dissolving pulp production

  • Herbert SixtaEmail author
  • Mikhail Iakovlev
  • Lidia Testova
  • Annariikka Roselli
  • Michael Hummel
  • Marc Borrega
  • Adriaan van Heiningen
  • Carmen Froschauer
  • Herwig Schottenberger
Review Paper


Herein, we report about existing and novel dissolving pulp processes providing the basis for an advanced biorefinery. The SO2–ethanol–water (SEW) process has the potential to replace the acid sulphite process for the production of rayon-grade pulps owing to a higher flexibility in the selection of the raw material source, substantially lower cooking times, and the near absence of sugar degradation products. Special attention is paid to developments that target toward the selective and quantitative fractionation of paper-grade pulps into hemicelluloses and cellulose of highest purity. This target has been accomplished by the IONCELL process where the entire hemicellulose fraction is selectively dissolved in an ionic liquid in which the H-bond basicity and acidity are adequately adjusted by the addition of a co-solvent. At the same time, pure hemicellulose can be recovered by further addition of the co-solvent, which then acts as a non-solvent. The residual pure cellulose fraction may then enter a Lyocell process for the production of regenerated cellulose products.


Dissolving pulp Acid sulfite pulp Prehydrolysis-Kraft pulp Cold caustic extraction Ionic liquids Ioncell process 



Funding from Finnish Funding Agency for Technology and Innovation (Tekes) and FiBiC (former Forestcluster Ltd.) as a part of the Future Biorefinery programme is gratefully acknowledged.


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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • Herbert Sixta
    • 1
    Email author
  • Mikhail Iakovlev
    • 1
  • Lidia Testova
    • 1
  • Annariikka Roselli
    • 1
  • Michael Hummel
    • 1
  • Marc Borrega
    • 1
  • Adriaan van Heiningen
    • 2
  • Carmen Froschauer
    • 3
  • Herwig Schottenberger
    • 3
  1. 1.Department of Forest Products Technology, School of Chemical TechnologyAalto UniversityEspooFinland
  2. 2.Department of Chemical and Biological EngineeringUniversity of MaineOronoUSA
  3. 3.Faculty of Chemistry and PharmacyUniversity of InnsbruckInnsbruckAustria

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