dc.contributor.author | Lehto, Joni | |
dc.contributor.author | Alén, Raimo | |
dc.contributor.author | Kleen, Marjatta | |
dc.date.accessioned | 2017-04-12T07:18:40Z | |
dc.date.available | 2017-04-12T07:18:40Z | |
dc.date.issued | 2016 | |
dc.identifier.citation | Lehto, J., Alén, R., & Kleen, M. (2016). Sulfur-free pulping of hot-water-extracted spruce sawdust. <i>Nordic Pulp and Paper Research Journal</i>, <i>31</i>(1), 41-48. <a href="https://doi.org/10.3183/npprj-2016-31-01-p041-048" target="_blank">https://doi.org/10.3183/npprj-2016-31-01-p041-048</a> | |
dc.identifier.other | CONVID_25492456 | |
dc.identifier.other | TUTKAID_68878 | |
dc.identifier.uri | https://jyx.jyu.fi/handle/123456789/53580 | |
dc.description.abstract | Softwood (Picea abies) sawdust was hot-water-extracted with two multi-phase processes (160-180°C, 100-280 min, and liquor-to-wood ratio 5 l/kg) corresponding to P-factors of ~780 (yield 80.0%) and ~4580 (yield 72.4%). The pre-treated materials were then pulped with the soda-AQ cooking (170°C, NaOH charge 20%, AQ charge 0.1%, 30-150 min, and liquor-to-wood ratio 5 l/kg), resulting in a yield range of 36.1-61.4% (for reference cooks without pre-extraction 47.9-60.0%). It was observed that the pre-extraction under moderate conditions enhanced the dissolution especially of large-molar-mass lignin during cooking, and the total amount of the dissolved lignin was also higher than that removed from the material pre-extracted under harsh conditions. Additionally, in the former case the pulps with rather good properties (high yield and low amount of pulp rejects) were obtained, whereas in the latter case, a pronounced degradation of pulp carbohydrates to aliphatic acids was observed resulting in lower pulp properties. | |
dc.language.iso | eng | |
dc.publisher | Mid Sweden University | |
dc.relation.ispartofseries | Nordic Pulp and Paper Research Journal | |
dc.subject.other | Hot-water pre-treatment | |
dc.subject.other | Aliphatic acids | |
dc.subject.other | Hemicelluloses | |
dc.subject.other | Extractives | |
dc.subject.other | Molar-mass distribution | |
dc.title | Sulfur-free pulping of hot-water-extracted spruce sawdust | |
dc.type | article | |
dc.identifier.urn | URN:NBN:fi:jyu-201704051913 | |
dc.contributor.laitos | Kemian laitos | fi |
dc.contributor.laitos | Department of Chemistry | en |
dc.contributor.oppiaine | Soveltava kemia | fi |
dc.contributor.oppiaine | Applied Chemistry | en |
dc.type.uri | http://purl.org/eprint/type/JournalArticle | |
dc.date.updated | 2017-04-05T15:15:05Z | |
dc.type.coar | http://purl.org/coar/resource_type/c_2df8fbb1 | |
dc.description.reviewstatus | peerReviewed | |
dc.format.pagerange | 41-48 | |
dc.relation.issn | 0283-2631 | |
dc.relation.numberinseries | 1 | |
dc.relation.volume | 31 | |
dc.type.version | publishedVersion | |
dc.rights.copyright | © 2016 the Authors. This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial License. | |
dc.rights.accesslevel | openAccess | fi |
dc.subject.yso | metsäkuusi | |
dc.subject.yso | hiilihydraatit | |
dc.subject.yso | ligniini | |
jyx.subject.uri | http://www.yso.fi/onto/yso/p5552 | |
jyx.subject.uri | http://www.yso.fi/onto/yso/p7171 | |
jyx.subject.uri | http://www.yso.fi/onto/yso/p19011 | |
dc.rights.url | https://creativecommons.org/licenses/by-nc/4.0/ | |
dc.relation.doi | 10.3183/npprj-2016-31-01-p041-048 | |
dc.type.okm | A1 | |