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Dissolution of dissolving pulp in alkaline solvents after steam explosion pretreatments

Kihlman, Martin; Wallberg, Ola LU ; Stigsson, Lars and Germgard, Ulf (2011) 11th European Workshop of Lignocelluloses and Pulp (EWLP) In Holzforschung 65(4). p.613-617
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... (More)
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. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
alkaline solvent systems, cellulose, dissolution, steam explosion
in
Holzforschung
volume
65
issue
4
pages
613 - 617
publisher
De Gruyter
conference name
11th European Workshop of Lignocelluloses and Pulp (EWLP)
external identifiers
  • wos:000291534600023
  • scopus:79959429785
ISSN
0018-3830
1437-434X
DOI
10.1515/HF.2011.094
language
English
LU publication?
yes
id
80dfb41c-3770-4491-b9e8-99f9206d68d3 (old id 1984900)
date added to LUP
2011-07-08 15:14:27
date last changed
2017-08-13 03:05:32
@inproceedings{80dfb41c-3770-4491-b9e8-99f9206d68d3,
  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.},
  author       = {Kihlman, Martin and Wallberg, Ola and Stigsson, Lars and Germgard, Ulf},
  booktitle    = {Holzforschung},
  issn         = {0018-3830},
  keyword      = {alkaline solvent systems,cellulose,dissolution,steam explosion},
  language     = {eng},
  number       = {4},
  pages        = {613--617},
  publisher    = {De Gruyter},
  title        = {Dissolution of dissolving pulp in alkaline solvents after steam explosion pretreatments},
  url          = {http://dx.doi.org/10.1515/HF.2011.094},
  volume       = {65},
  year         = {2011},
}