Dissolution of dissolving pulp in alkaline solvents after steam explosion pretreatments

Martin Kihlman, Ola Wallberg, Lars Stigsson, Ulf Germgard

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingResearchpeer-review

18 Citations (SciVal)

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.
Original languageEnglish
Title of host publicationHolzforschung
PublisherDe Gruyter
Pages613-617
Volume65
DOIs
Publication statusPublished - 2011
Event11th European Workshop of Lignocelluloses and Pulp (EWLP) - Hamburg, Germany
Duration: 2010 Aug 162010 Aug 19

Publication series

Name
Number4
Volume65
ISSN (Print)0018-3830
ISSN (Electronic)1437-434X

Conference

Conference11th European Workshop of Lignocelluloses and Pulp (EWLP)
Country/TerritoryGermany
CityHamburg
Period2010/08/162010/08/19

Subject classification (UKÄ)

  • Chemical Engineering

Keywords

  • alkaline solvent systems
  • cellulose
  • dissolution
  • steam explosion

Fingerprint

Dive into the research topics of 'Dissolution of dissolving pulp in alkaline solvents after steam explosion pretreatments'. Together they form a unique fingerprint.

Cite this