KRAFT AND KRAFT/AQ PULPING FROM PREHIDROLYZED WOOD OF HYBRID Eucalyptus urophylla x grandis
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.5902/1980509825148 http://hdl.handle.net/11449/162384 |
Resumo: | The 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%). |
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KRAFT AND KRAFT/AQ PULPING FROM PREHIDROLYZED WOOD OF HYBRID Eucalyptus urophylla x grandisanthraquinonepulpingdissolving pulpeucalyptusThe 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%).Inst Fed Sao Paulo, Dept Mecan, Ave Joao Olimpio Oliveira 1561, BR-18202000 Itapetininga, SP, BrazilFac Ciencias Sociais & Agr, Curso Engn Florestal, Rod Francisco Alves Negrao,Km 285, BR-18412000 Itapeva, SP, BrazilUniv Estadual Paulista, Rua Geraldo Alckmin 519, BR-18409010 Itapeva, SP, BrazilECTX SA, Rua Ribeirao Preto 811-909, BR-13323010 Salto, SP, BrazilUniv Estadual Paulista, Rua Geraldo Alckmin 519, BR-18409010 Itapeva, SP, BrazilCentro Pesquisas Florestais, UfsmInst Fed Sao PauloFac Ciencias Sociais & AgrUniversidade Estadual Paulista (Unesp)ECTX SASantos, Rafael dosMello Junior, Julio Antonio deCaraschi, Jose Claudio [UNESP]Ventorim, Gustavo [UNESP]Pereira, Felipo Augusto2018-11-26T17:16:28Z2018-11-26T17:16:28Z2016-10-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1281-1290application/pdfhttp://dx.doi.org/10.5902/1980509825148Ciencia Florestal. Santa Maria: Centro Pesquisas Florestais, Ufsm, v. 26, n. 4, p. 1281-1290, 2016.0103-9954http://hdl.handle.net/11449/16238410.5902/1980509825148S1980-50982016000401281WOS:000392658200022S1980-50982016000401281.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporCiencia Florestal0,420info:eu-repo/semantics/openAccess2023-10-16T06:06:06Zoai:repositorio.unesp.br:11449/162384Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T15:05:51.702178Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
KRAFT AND KRAFT/AQ PULPING FROM PREHIDROLYZED WOOD OF HYBRID Eucalyptus urophylla x grandis |
title |
KRAFT AND KRAFT/AQ PULPING FROM PREHIDROLYZED WOOD OF HYBRID Eucalyptus urophylla x grandis |
spellingShingle |
KRAFT AND KRAFT/AQ PULPING FROM PREHIDROLYZED WOOD OF HYBRID Eucalyptus urophylla x grandis Santos, Rafael dos anthraquinone pulping dissolving pulp eucalyptus |
title_short |
KRAFT AND KRAFT/AQ PULPING FROM PREHIDROLYZED WOOD OF HYBRID Eucalyptus urophylla x grandis |
title_full |
KRAFT AND KRAFT/AQ PULPING FROM PREHIDROLYZED WOOD OF HYBRID Eucalyptus urophylla x grandis |
title_fullStr |
KRAFT AND KRAFT/AQ PULPING FROM PREHIDROLYZED WOOD OF HYBRID Eucalyptus urophylla x grandis |
title_full_unstemmed |
KRAFT AND KRAFT/AQ PULPING FROM PREHIDROLYZED WOOD OF HYBRID Eucalyptus urophylla x grandis |
title_sort |
KRAFT AND KRAFT/AQ PULPING FROM PREHIDROLYZED WOOD OF HYBRID Eucalyptus urophylla x grandis |
author |
Santos, Rafael dos |
author_facet |
Santos, Rafael dos Mello Junior, Julio Antonio de Caraschi, Jose Claudio [UNESP] Ventorim, Gustavo [UNESP] Pereira, Felipo Augusto |
author_role |
author |
author2 |
Mello Junior, Julio Antonio de Caraschi, Jose Claudio [UNESP] Ventorim, Gustavo [UNESP] Pereira, Felipo Augusto |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Inst Fed Sao Paulo Fac Ciencias Sociais & Agr Universidade Estadual Paulista (Unesp) ECTX SA |
dc.contributor.author.fl_str_mv |
Santos, Rafael dos Mello Junior, Julio Antonio de Caraschi, Jose Claudio [UNESP] Ventorim, Gustavo [UNESP] Pereira, Felipo Augusto |
dc.subject.por.fl_str_mv |
anthraquinone pulping dissolving pulp eucalyptus |
topic |
anthraquinone pulping dissolving pulp eucalyptus |
description |
The 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%). |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-10-01 2018-11-26T17:16:28Z 2018-11-26T17:16:28Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.5902/1980509825148 Ciencia Florestal. Santa Maria: Centro Pesquisas Florestais, Ufsm, v. 26, n. 4, p. 1281-1290, 2016. 0103-9954 http://hdl.handle.net/11449/162384 10.5902/1980509825148 S1980-50982016000401281 WOS:000392658200022 S1980-50982016000401281.pdf |
url |
http://dx.doi.org/10.5902/1980509825148 http://hdl.handle.net/11449/162384 |
identifier_str_mv |
Ciencia Florestal. Santa Maria: Centro Pesquisas Florestais, Ufsm, v. 26, n. 4, p. 1281-1290, 2016. 0103-9954 10.5902/1980509825148 S1980-50982016000401281 WOS:000392658200022 S1980-50982016000401281.pdf |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Ciencia Florestal 0,420 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1281-1290 application/pdf |
dc.publisher.none.fl_str_mv |
Centro Pesquisas Florestais, Ufsm |
publisher.none.fl_str_mv |
Centro Pesquisas Florestais, Ufsm |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1808128460292358144 |