INFLUENCE OF INTERMEDIATE WASHING IN OXYGEN DELIGNIFICATION ON KRAFT PULP

Detalhes bibliográficos
Autor(a) principal: Venson, Ivan
Data de Publicação: 2015
Outros Autores: Andrade, Alan Sulato de, Klock, Umberto, Muñiz, Graciela Inés Bolzón de, Nisgoski, Silvana, Cardoso, Gilson da Silva
Tipo de documento: Artigo
Idioma: por
Título da fonte: Ciência Florestal (Online)
Texto Completo: https://periodicos.ufsm.br/cienciaflorestal/article/view/20660
Resumo: http://dx.doi.org/10.5902/1980509820660In the oxygen delignification lignin is removed from the pulp by applying high pressure oxygen, under alkaline conditions, resulting in a lower demand for chemicals in bleaching. The main objective of this study was to evaluate the influence of washing (conventional and acid) between two stages of O2 on the amount of residual lignin and transition metal present in samples of Pine Kraft pulp with 48.5 initial kappa. The reduction of kappa number and pulp degradation after two stages of O2 treatment with increase of final brightness on sheet produced were observed. The metal content of pulp during oxygen delignification was influenced by washing process, and the acid wash removed more percentage of metallic ions than  conventional wash. The best results were obtained with the removal of the element manganese. The acid wash between two stages of delignification contributed to the control of transition metals, which optimize the use of bleaching reagents in the following steps. We concluded that the intermediate washing improves the performance of the oxygen delignification of high kappa number pulps performed in two stages. 
id UFSM-6_2fcd02f2fa298535c607d818413835f1
oai_identifier_str oai:ojs.pkp.sfu.ca:article/20660
network_acronym_str UFSM-6
network_name_str Ciência Florestal (Online)
repository_id_str
spelling INFLUENCE OF INTERMEDIATE WASHING IN OXYGEN DELIGNIFICATION ON KRAFT PULPINFLUÊNCIA DA LAVAGEM INTERMEDIÁRIA NA DESLIGNIFICAÇÃO COM OXIGÊNIO EM POLPA KRAFTpulp washingoxygen delignificationhigh kappatransition metals.lavagem da polpadeslignificação com oxigênionúmero kappa elevadometais de transição.http://dx.doi.org/10.5902/1980509820660In the oxygen delignification lignin is removed from the pulp by applying high pressure oxygen, under alkaline conditions, resulting in a lower demand for chemicals in bleaching. The main objective of this study was to evaluate the influence of washing (conventional and acid) between two stages of O2 on the amount of residual lignin and transition metal present in samples of Pine Kraft pulp with 48.5 initial kappa. The reduction of kappa number and pulp degradation after two stages of O2 treatment with increase of final brightness on sheet produced were observed. The metal content of pulp during oxygen delignification was influenced by washing process, and the acid wash removed more percentage of metallic ions than  conventional wash. The best results were obtained with the removal of the element manganese. The acid wash between two stages of delignification contributed to the control of transition metals, which optimize the use of bleaching reagents in the following steps. We concluded that the intermediate washing improves the performance of the oxygen delignification of high kappa number pulps performed in two stages. http://dx.doi.org/10.5902/1980509820660Na deslignificação com oxigênio, a lignina é removida da polpa através da aplicação de elevada pressão de oxigênio, em condições alcalinas, resultando em uma menor demanda por produtos químicos na etapa de branqueamento. O objetivo principal deste trabalho foi avaliar a influência do tipo de lavagem (convencional e ácida) entre dois estágios de deslignificação com oxigênio sobre a quantidade de lignina residual e o teor de metais de transição presentes em amostras de polpa kraft de pinus com número kappa inicial de 48,5. Observou-se a redução do número kappa e da viscosidade da polpa após o tratamento com O2 em duplo estágio, além do aumento da alvura final das polpas produzidas. O teor de metais da polpa durante a deslignificação com oxigênio sofreu influência do processo de lavagem, sendo que a lavagem ácida retirou maior quantidade de íons metálicos do que a lavagem convencional. Os melhores resultados foram obtidos com a retirada do elemento manganês. A lavagem ácida entre dois estágios de deslignificação contribuiu para o controle de metais de transição, o que otimizou a utilização de reagentes químicos do branqueamento nas etapas seguintes. Conclui-se que a lavagem intermediária melhorou o desempenho do oxigênio na deslignificação de polpas de número kappa elevado realizada em dois estágios.Universidade Federal de Santa Maria2015-12-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.ufsm.br/cienciaflorestal/article/view/2066010.5902/1980509820660Ciência Florestal; Vol. 25 No. 4 (2015); 991-999Ciência Florestal; v. 25 n. 4 (2015); 991-9991980-50980103-9954reponame:Ciência Florestal (Online)instname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMporhttps://periodicos.ufsm.br/cienciaflorestal/article/view/20660/pdfVenson, IvanAndrade, Alan Sulato deKlock, UmbertoMuñiz, Graciela Inés Bolzón deNisgoski, SilvanaCardoso, Gilson da Silvainfo:eu-repo/semantics/openAccess2017-04-10T13:43:07Zoai:ojs.pkp.sfu.ca:article/20660Revistahttp://www.ufsm.br/cienciaflorestal/ONGhttps://old.scielo.br/oai/scielo-oai.php||cienciaflorestal@ufsm.br|| cienciaflorestal@gmail.com|| cf@smail.ufsm.br1980-50980103-9954opendoar:2017-04-10T13:43:07Ciência Florestal (Online) - Universidade Federal de Santa Maria (UFSM)false
dc.title.none.fl_str_mv INFLUENCE OF INTERMEDIATE WASHING IN OXYGEN DELIGNIFICATION ON KRAFT PULP
INFLUÊNCIA DA LAVAGEM INTERMEDIÁRIA NA DESLIGNIFICAÇÃO COM OXIGÊNIO EM POLPA KRAFT
title INFLUENCE OF INTERMEDIATE WASHING IN OXYGEN DELIGNIFICATION ON KRAFT PULP
spellingShingle INFLUENCE OF INTERMEDIATE WASHING IN OXYGEN DELIGNIFICATION ON KRAFT PULP
Venson, Ivan
pulp washing
oxygen delignification
high kappa
transition metals.
lavagem da polpa
deslignificação com oxigênio
número kappa elevado
metais de transição.
title_short INFLUENCE OF INTERMEDIATE WASHING IN OXYGEN DELIGNIFICATION ON KRAFT PULP
title_full INFLUENCE OF INTERMEDIATE WASHING IN OXYGEN DELIGNIFICATION ON KRAFT PULP
title_fullStr INFLUENCE OF INTERMEDIATE WASHING IN OXYGEN DELIGNIFICATION ON KRAFT PULP
title_full_unstemmed INFLUENCE OF INTERMEDIATE WASHING IN OXYGEN DELIGNIFICATION ON KRAFT PULP
title_sort INFLUENCE OF INTERMEDIATE WASHING IN OXYGEN DELIGNIFICATION ON KRAFT PULP
author Venson, Ivan
author_facet Venson, Ivan
Andrade, Alan Sulato de
Klock, Umberto
Muñiz, Graciela Inés Bolzón de
Nisgoski, Silvana
Cardoso, Gilson da Silva
author_role author
author2 Andrade, Alan Sulato de
Klock, Umberto
Muñiz, Graciela Inés Bolzón de
Nisgoski, Silvana
Cardoso, Gilson da Silva
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Venson, Ivan
Andrade, Alan Sulato de
Klock, Umberto
Muñiz, Graciela Inés Bolzón de
Nisgoski, Silvana
Cardoso, Gilson da Silva
dc.subject.por.fl_str_mv pulp washing
oxygen delignification
high kappa
transition metals.
lavagem da polpa
deslignificação com oxigênio
número kappa elevado
metais de transição.
topic pulp washing
oxygen delignification
high kappa
transition metals.
lavagem da polpa
deslignificação com oxigênio
número kappa elevado
metais de transição.
description http://dx.doi.org/10.5902/1980509820660In the oxygen delignification lignin is removed from the pulp by applying high pressure oxygen, under alkaline conditions, resulting in a lower demand for chemicals in bleaching. The main objective of this study was to evaluate the influence of washing (conventional and acid) between two stages of O2 on the amount of residual lignin and transition metal present in samples of Pine Kraft pulp with 48.5 initial kappa. The reduction of kappa number and pulp degradation after two stages of O2 treatment with increase of final brightness on sheet produced were observed. The metal content of pulp during oxygen delignification was influenced by washing process, and the acid wash removed more percentage of metallic ions than  conventional wash. The best results were obtained with the removal of the element manganese. The acid wash between two stages of delignification contributed to the control of transition metals, which optimize the use of bleaching reagents in the following steps. We concluded that the intermediate washing improves the performance of the oxygen delignification of high kappa number pulps performed in two stages. 
publishDate 2015
dc.date.none.fl_str_mv 2015-12-30
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://periodicos.ufsm.br/cienciaflorestal/article/view/20660
10.5902/1980509820660
url https://periodicos.ufsm.br/cienciaflorestal/article/view/20660
identifier_str_mv 10.5902/1980509820660
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://periodicos.ufsm.br/cienciaflorestal/article/view/20660/pdf
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Federal de Santa Maria
publisher.none.fl_str_mv Universidade Federal de Santa Maria
dc.source.none.fl_str_mv Ciência Florestal; Vol. 25 No. 4 (2015); 991-999
Ciência Florestal; v. 25 n. 4 (2015); 991-999
1980-5098
0103-9954
reponame:Ciência Florestal (Online)
instname:Universidade Federal de Santa Maria (UFSM)
instacron:UFSM
instname_str Universidade Federal de Santa Maria (UFSM)
instacron_str UFSM
institution UFSM
reponame_str Ciência Florestal (Online)
collection Ciência Florestal (Online)
repository.name.fl_str_mv Ciência Florestal (Online) - Universidade Federal de Santa Maria (UFSM)
repository.mail.fl_str_mv ||cienciaflorestal@ufsm.br|| cienciaflorestal@gmail.com|| cf@smail.ufsm.br
_version_ 1799944130485288960

Registros relacionados