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dc.contributor.authorSantos, Rafael dos
dc.contributor.authorMello Junior, Julio Antonio de
dc.contributor.authorCaraschi, Jose Claudio [UNESP]
dc.contributor.authorVentorim, Gustavo [UNESP]
dc.contributor.authorPereira, Felipo Augusto
dc.date.accessioned2018-11-26T17:16:28Z
dc.date.available2018-11-26T17:16:28Z
dc.date.issued2016-10-01
dc.identifierhttp://dx.doi.org/10.5902/1980509825148
dc.identifier.citationCiencia Florestal. Santa Maria: Centro Pesquisas Florestais, Ufsm, v. 26, n. 4, p. 1281-1290, 2016.
dc.identifier.issn0103-9954
dc.identifier.urihttp://hdl.handle.net/11449/162384
dc.description.abstractThe wood of the gender Eucalyptus occupies a prominence place among other cellulose sources due to its chemical composition, its low cost, abundance and availability. Among the chemical pulping processes, kraft process is the most extensively one used for the production of cellulosic pulps starting from eucalyptus wood. The anthraquinone (AQ) usage in the pulping has as main purposes to increase the delignification rate as well as to protect the pulp from the carbohydrate degradation. The present work has aimed to use the anthraquinone as an addictive in the cooking seeking to reduce the load of applied sulphidity without harming the quality of the pulp. The kraft and kraft/AQ cooking were accomplished in rotative laboratorial digester being varied the active alkali initially (10, 13, 16 and 19%) and, later, the sulphidity (5, 10, 15, 20 and 25%), maintaining the other conditions constant aiming to obtain pulp with kappa number close to nine. Starting from the variation of the active alkali and of the sulphidity, delignification curves were established between active alkali and kappa number and, sulphidity and kappa number, where it was possible to establish the minimum necessary amounts of alkali, as well as of the sulphidity. Starting from the cooking, it was possible to establish the active alkali and sulphidity loads of 17,4% and 8,8%, respectively. The cooking to the certain conditions presented screened yield of 48,63%, and the yield based on the initial mass of wood was of 42,24%, obtaining a high quality pulp, in other words, with low number kappa and hemicelluloses tenor (0,41%) and high tenor of alpha cellulose (98,49%).en
dc.format.extent1281-1290
dc.language.isopor
dc.publisherCentro Pesquisas Florestais, Ufsm
dc.relation.ispartofCiencia Florestal
dc.sourceWeb of Science
dc.subjectanthraquinone
dc.subjectpulping
dc.subjectdissolving pulp
dc.subjecteucalyptus
dc.titleKRAFT AND KRAFT/AQ PULPING FROM PREHIDROLYZED WOOD OF HYBRID Eucalyptus urophylla x grandisen
dc.typeArtigo
dcterms.rightsHolderCentro Pesquisas Florestais, Ufsm
dc.contributor.institutionInst Fed Sao Paulo
dc.contributor.institutionFac Ciencias Sociais & Agr
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionECTX SA
dc.description.affiliationInst Fed Sao Paulo, Dept Mecan, Ave Joao Olimpio Oliveira 1561, BR-18202000 Itapetininga, SP, Brazil
dc.description.affiliationFac Ciencias Sociais & Agr, Curso Engn Florestal, Rod Francisco Alves Negrao,Km 285, BR-18412000 Itapeva, SP, Brazil
dc.description.affiliationUniv Estadual Paulista, Rua Geraldo Alckmin 519, BR-18409010 Itapeva, SP, Brazil
dc.description.affiliationECTX SA, Rua Ribeirao Preto 811-909, BR-13323010 Salto, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Rua Geraldo Alckmin 519, BR-18409010 Itapeva, SP, Brazil
dc.identifier.doi10.5902/1980509825148
dc.identifier.scieloS1980-50982016000401281
dc.identifier.wosWOS:000392658200022
dc.rights.accessRightsAcesso aberto
dc.identifier.fileS1980-50982016000401281.pdf
dc.relation.ispartofsjr0,420
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