Please use this identifier to cite or link to this item:
http://hdl.handle.net/10773/36124
Title: | Changes in sulfite liquor composition while re-profiling mill from paper-grade to dissolving pulp production |
Author: | Magina, Sandra Mendes, Inês S. F. Prates, António Evtuguin, Dmitry V. |
Issue Date: | 2022 |
Publisher: | Taylor & Francis |
Abstract: | The re-profiling from paper-grade to dissolving pulp production is a common trend for acid sulfite cooking of wood. This provides substantial changes in the composition of the spent sulfite liquor (SSL) affecting its potentialities in subsequent processing within the biorefinery concept. In this work, a comparative analysis of the chemical composition of SSL was performed from the magnesium-based acid sulfite cooking of Eucalyptus globulus wood to produce the paper-grade and dissolving pulps. More severe pulping conditions required for dissolving pulp production led to a substantial increase in volatile compounds in SSL, such as acetic acid, methanol, and furfural. At the same time, the amounts of dissolved sugars and lignosulfonates (LS) were increased to a less extent. The main changes detected in LS were related to the increase of its molecular weight, degree of condensation, and sulfonation degree. The increased concentration of the sulfuric acid in SSL was one of the reasons for these change |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/36124 |
DOI: | 10.1080/02773813.2022.2068603 |
ISSN: | 0277-3813 |
Appears in Collections: | CICECO - Artigos |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Changes in sulfite liquor composition while re profiling mill from paper grade to dissolving pulp production.pdf | 1.94 MB | Adobe PDF |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.