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)
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:
https://lup.lub.lu.se/record/1984900
- author
- Kihlman, Martin
; Wallberg, Ola
LU
; Stigsson, Lars
and Germgard, Ulf
- organization
- publishing date
- 2011
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- alkaline solvent systems, cellulose, dissolution, steam explosion
- host publication
- Holzforschung
- volume
- 65
- issue
- 4
- pages
- 613 - 617
- publisher
- De Gruyter
- conference name
- 11th European Workshop of Lignocelluloses and Pulp (EWLP)
- conference location
- Hamburg, Germany
- conference dates
- 2010-08-16 - 2010-08-19
- external identifiers
-
- wos:000291534600023
- scopus:79959429785
- ISSN
- 1437-434X
- 0018-3830
- DOI
- 10.1515/HF.2011.094
- language
- English
- LU publication?
- yes
- id
- 80dfb41c-3770-4491-b9e8-99f9206d68d3 (old id 1984900)
- date added to LUP
- 2016-04-01 10:01:43
- date last changed
- 2025-04-21 11:29:11
@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 = {{1437-434X}},
keywords = {{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}},
doi = {{10.1515/HF.2011.094}},
volume = {{65}},
year = {{2011}},
}