Repository logo
 
Publication

The effect of wood extractives on pulp properties of maritime pine kraft pulp

2006Journal article Open access
Simple item page
dc.contributor.authorBaptista, Cecília
dc.contributor.authorBelgacem, Mohamed Naceur
dc.contributor.authorDuarte, Ana Paula
dc.date.accessioned2010-04-28T10:06:59Z
dc.date.available2010-04-28T10:06:59Z
dc.date.issued2006
dc.description.abstractThe effect of wood extractives on pulp properties, namely the colour of the unbleached pulp and its bleaching aptitude, was evaluated by carrying out kraft cookings after extractive removal of the Pinus pinaster wood. The colour of the pulps thus obtained was compared to a reference pulp prepared without any wood extraction. Two types of wood extraction were realised. The first one consisted on using different non-swelling and swelling solvents allying upon 8 different extractions, whereas the second one was an alkaline pre-treatment of the wood chips. For the first set of extractions, acetone and ethanol-toluene appeared to be the most efficient, since the pulps obtained from wood previously extracted by these solvents showed an increase in the reflectance factor by up to 7,5% and a decrease in the kappa number of about 4 points. For the second type of pre-treatment, the results obtained showed improvements of 10% in the reflectance factor of unbleached pulp and about 12% in the kappa number. The influence of the extractives on the pulp bleachability was studied by submitting the most promising samples to a DE bleaching sequence. These pulps showed increments in the reflectance factor more than 30% higher when compared with the reference.pt
dc.identifier.urihttp://hdl.handle.net/10400.6/575
dc.languageeng
dc.subjectMaritime pinept
dc.subjectKraft pulppt
dc.subjectOrganic solventspt
dc.subjectAlkaline extractionpt
dc.subjectKappa numberpt
dc.subjectReflectance factorpt
dc.subjectBleachabilitypt
dc.titleThe effect of wood extractives on pulp properties of maritime pine kraft pulppt
dc.typejournal article
dspace.entity.typePublication
oaire.citation.issue4pt
oaire.citation.titleAppita Journalpt
person.familyNamede Melo Correia Baptista
person.familyNameBelgacem
person.familyNameDuarte
person.givenNameCecília
person.givenNameMohamed Naceur
person.givenNameAna Paula
person.identifier1255684
person.identifier.ciencia-id5210-7F4F-5F4D
person.identifier.ciencia-idBC15-D376-80FE
person.identifier.orcid0000-0003-4664-6766
person.identifier.orcid0000-0002-3317-7369
person.identifier.orcid0000-0003-3333-5977
person.identifier.ridB-7123-2016
person.identifier.ridB-5904-2009
person.identifier.scopus-author-id36779562200
person.identifier.scopus-author-id7003580370
person.identifier.scopus-author-id7102602131
rcaap.rightsopenAccess
rcaap.typearticlept
relation.isAuthorOfPublication0ae278d7-b286-49f6-87bd-4a183c24e16c
relation.isAuthorOfPublication2bce69fd-cc05-44dd-bb7d-84864ba470a1
relation.isAuthorOfPublication971779ac-7c22-4f69-8bdd-4e0ec442ef2d
relation.isAuthorOfPublication.latestForDiscovery0ae278d7-b286-49f6-87bd-4a183c24e16c

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
AppitaExt.pdf
Size:
1.33 MB
Format:
Adobe Portable Document Format
Download

Collections

FE - DCTP | Documentos por Auto-Depósito