Dissolution of dissolving pulp in alkaline solvents after steam explosion pretreatments

Martin Kihlman, Ola Wallberg, Lars Stigsson, Ulf Germgard

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18 Citeringar (SciVal)

Sammanfattning

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.
Originalspråkengelska
Titel på gästpublikationHolzforschung
FörlagDe Gruyter
Sidor613-617
Volym65
DOI
StatusPublished - 2011
Evenemang11th European Workshop of Lignocelluloses and Pulp (EWLP) - Hamburg, Tyskland
Varaktighet: 2010 aug 162010 aug 19

Publikationsserier

Namn
Nummer4
Volym65
ISSN (tryckt)0018-3830
ISSN (elektroniskt)1437-434X

Konferens

Konferens11th European Workshop of Lignocelluloses and Pulp (EWLP)
Land/TerritoriumTyskland
OrtHamburg
Period2010/08/162010/08/19

Ämnesklassifikation (UKÄ)

  • Kemiteknik

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