EVALUATION OF EUCALYPTUS KRAFT PULP LIGNIN THROUGH THE NITROBENZENE OXIDATION, COPPER OXIDE REDUCTION AND ACIDOLYSIS TECHNIQUES

Detalhes bibliográficos
Autor(a) principal: Ventorim, Gustavo
Data de Publicação: 2014
Outros Autores: Coelho, Alexandre, Colodette, Jorge Luiz, Alves, Ericka Figueiredo, Comelato, Jaqueline Silveira
Tipo de documento: Artigo
Idioma: por
Título da fonte: Ciência Florestal (Online)
Texto Completo: https://periodicos.ufsm.br/cienciaflorestal/article/view/13337
Resumo: http://dx.doi.org/10.5902/1980509813337This study aimed to evaluate the sensitiveness of the information obtained for the residual lignin from Eucalyptus grandis kraft pulps analyzed through the nitrobenzene oxidation, copper oxide (CuO) reduction and acidolysis techniques. The chips were cooked, resulting pulps of kappa number 14,5 and 16,9, respectively. Both lignins’ pulps were evaluated through three methods (nitrobenzene oxidation, copper oxide oxidation and acidolysis). Then, they were subjected to an oxygen delignification stage. The 16,9 kappa number pulp resulted in higher levels of non-condensed lignin structures by the acidolysis method, higher syringyl/vanillin ratios (S/V) by the nitrobenzene and copper oxide methods and better performance in the oxygen delignification stage. The different methods allowed to differ the residual lignin pulps with kappa number 14,5 and 16,9, and the nitrobenzene oxidation method showed the highest sensitiveness in this study results.
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spelling EVALUATION OF EUCALYPTUS KRAFT PULP LIGNIN THROUGH THE NITROBENZENE OXIDATION, COPPER OXIDE REDUCTION AND ACIDOLYSIS TECHNIQUESAvaliação da sensibilidade das análises da lignina residual pelos métodos de nitrobenzeno, óxido de cobre e acidóliseresidual ligninnitrobenzene oxidationacidolysiscopper oxide.lignina residualoxidação com nitrobenzenoacidóliseóxido de cobrehttp://dx.doi.org/10.5902/1980509813337This study aimed to evaluate the sensitiveness of the information obtained for the residual lignin from Eucalyptus grandis kraft pulps analyzed through the nitrobenzene oxidation, copper oxide (CuO) reduction and acidolysis techniques. The chips were cooked, resulting pulps of kappa number 14,5 and 16,9, respectively. Both lignins’ pulps were evaluated through three methods (nitrobenzene oxidation, copper oxide oxidation and acidolysis). Then, they were subjected to an oxygen delignification stage. The 16,9 kappa number pulp resulted in higher levels of non-condensed lignin structures by the acidolysis method, higher syringyl/vanillin ratios (S/V) by the nitrobenzene and copper oxide methods and better performance in the oxygen delignification stage. The different methods allowed to differ the residual lignin pulps with kappa number 14,5 and 16,9, and the nitrobenzene oxidation method showed the highest sensitiveness in this study results.http://dx.doi.org/10.5902/1980509813337Este estudo teve com objetivo avaliar as sensibilidades das informações obtidas pelos procedimentos de análises de nitrobenzeno, óxido de cobre (CuO) e acidólise da lignina residual da polpa kraft de Eucalyptus grandis. Foram efetuados cozimentos destes cavacos, originando duas polpas, com números kappa 14,5 e 16,9, respectivamente. Ambas as polpas tiveram a lignina avaliada por três métodos (oxidação com nitrobenzeno, óxido de cobre e acidólise) de caracterização da lignina residual presente na polpa marrom. Em seguida, foram submetidas a um estágio de deslignificação com oxigênio. A polpa de número kappa 16,9 resultou em maior teor de estruturas de ligninas não condensadas pelo método da acidólise, maior relação siringil/vanilina (S/V) pelos métodos de nitrobenzeno e óxido de cobre e apresentou uma maior deslignificação no estágio com oxigênio. Os métodos empregados permitiram diferir as ligninas residuais das polpas com número kappa 14,5 e 16,9, sendo que o método da oxidação com nitrobenzeno apresentou a maior sensibilidade nos resultados encontrados deste estudo.Universidade Federal de Santa Maria2014-03-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.ufsm.br/cienciaflorestal/article/view/1333710.5902/1980509813337Ciência Florestal; Vol. 24 No. 1 (2014); 205-210Ciência Florestal; v. 24 n. 1 (2014); 205-2101980-50980103-9954reponame:Ciência Florestal (Online)instname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMporhttps://periodicos.ufsm.br/cienciaflorestal/article/view/13337/pdf_1Ventorim, GustavoCoelho, AlexandreColodette, Jorge LuizAlves, Ericka FigueiredoComelato, Jaqueline Silveirainfo:eu-repo/semantics/openAccess2017-04-13T18:21:43Zoai:ojs.pkp.sfu.ca:article/13337Revistahttp://www.ufsm.br/cienciaflorestal/ONGhttps://old.scielo.br/oai/scielo-oai.php||cienciaflorestal@ufsm.br|| cienciaflorestal@gmail.com|| cf@smail.ufsm.br1980-50980103-9954opendoar:2017-04-13T18:21:43Ciência Florestal (Online) - Universidade Federal de Santa Maria (UFSM)false
dc.title.none.fl_str_mv EVALUATION OF EUCALYPTUS KRAFT PULP LIGNIN THROUGH THE NITROBENZENE OXIDATION, COPPER OXIDE REDUCTION AND ACIDOLYSIS TECHNIQUES
Avaliação da sensibilidade das análises da lignina residual pelos métodos de nitrobenzeno, óxido de cobre e acidólise
title EVALUATION OF EUCALYPTUS KRAFT PULP LIGNIN THROUGH THE NITROBENZENE OXIDATION, COPPER OXIDE REDUCTION AND ACIDOLYSIS TECHNIQUES
spellingShingle EVALUATION OF EUCALYPTUS KRAFT PULP LIGNIN THROUGH THE NITROBENZENE OXIDATION, COPPER OXIDE REDUCTION AND ACIDOLYSIS TECHNIQUES
Ventorim, Gustavo
residual lignin
nitrobenzene oxidation
acidolysis
copper oxide.
lignina residual
oxidação com nitrobenzeno
acidólise
óxido de cobre
title_short EVALUATION OF EUCALYPTUS KRAFT PULP LIGNIN THROUGH THE NITROBENZENE OXIDATION, COPPER OXIDE REDUCTION AND ACIDOLYSIS TECHNIQUES
title_full EVALUATION OF EUCALYPTUS KRAFT PULP LIGNIN THROUGH THE NITROBENZENE OXIDATION, COPPER OXIDE REDUCTION AND ACIDOLYSIS TECHNIQUES
title_fullStr EVALUATION OF EUCALYPTUS KRAFT PULP LIGNIN THROUGH THE NITROBENZENE OXIDATION, COPPER OXIDE REDUCTION AND ACIDOLYSIS TECHNIQUES
title_full_unstemmed EVALUATION OF EUCALYPTUS KRAFT PULP LIGNIN THROUGH THE NITROBENZENE OXIDATION, COPPER OXIDE REDUCTION AND ACIDOLYSIS TECHNIQUES
title_sort EVALUATION OF EUCALYPTUS KRAFT PULP LIGNIN THROUGH THE NITROBENZENE OXIDATION, COPPER OXIDE REDUCTION AND ACIDOLYSIS TECHNIQUES
author Ventorim, Gustavo
author_facet Ventorim, Gustavo
Coelho, Alexandre
Colodette, Jorge Luiz
Alves, Ericka Figueiredo
Comelato, Jaqueline Silveira
author_role author
author2 Coelho, Alexandre
Colodette, Jorge Luiz
Alves, Ericka Figueiredo
Comelato, Jaqueline Silveira
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Ventorim, Gustavo
Coelho, Alexandre
Colodette, Jorge Luiz
Alves, Ericka Figueiredo
Comelato, Jaqueline Silveira
dc.subject.por.fl_str_mv residual lignin
nitrobenzene oxidation
acidolysis
copper oxide.
lignina residual
oxidação com nitrobenzeno
acidólise
óxido de cobre
topic residual lignin
nitrobenzene oxidation
acidolysis
copper oxide.
lignina residual
oxidação com nitrobenzeno
acidólise
óxido de cobre
description http://dx.doi.org/10.5902/1980509813337This study aimed to evaluate the sensitiveness of the information obtained for the residual lignin from Eucalyptus grandis kraft pulps analyzed through the nitrobenzene oxidation, copper oxide (CuO) reduction and acidolysis techniques. The chips were cooked, resulting pulps of kappa number 14,5 and 16,9, respectively. Both lignins’ pulps were evaluated through three methods (nitrobenzene oxidation, copper oxide oxidation and acidolysis). Then, they were subjected to an oxygen delignification stage. The 16,9 kappa number pulp resulted in higher levels of non-condensed lignin structures by the acidolysis method, higher syringyl/vanillin ratios (S/V) by the nitrobenzene and copper oxide methods and better performance in the oxygen delignification stage. The different methods allowed to differ the residual lignin pulps with kappa number 14,5 and 16,9, and the nitrobenzene oxidation method showed the highest sensitiveness in this study results.
publishDate 2014
dc.date.none.fl_str_mv 2014-03-30
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/13337
10.5902/1980509813337
url https://periodicos.ufsm.br/cienciaflorestal/article/view/13337
identifier_str_mv 10.5902/1980509813337
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://periodicos.ufsm.br/cienciaflorestal/article/view/13337/pdf_1
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. 24 No. 1 (2014); 205-210
Ciência Florestal; v. 24 n. 1 (2014); 205-210
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
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