Hexenuronic acid and lignin effects on ozonolysis performance in different reaction pHs

Detalhes bibliográficos
Autor(a) principal: Ventorim, Gustavo
Data de Publicação: 2006
Outros Autores: Colodette, Jorge Luiz
Tipo de documento: Artigo
Idioma: por
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://hdl.handle.net/11449/195857
Resumo: The effect of pH on the performance of the ozonolysis stage in pulp production was evaluated for conventional and acid treated brown and oxygen delignified eucalyptus kraft pulps. The objective was to determine separately the effects of lignin and hexenuronic acid on the performance of the ozonolysis stage. The reaction of ozone with hexenuronic acid is less sensitive to pH than the reaction of ozone with lignin. The efficiency and the selectivity of the reaction of ozone with pulp decreases after removal of hexenuronic acids. Increasing up to 7.0 the pH during the ozonolysis is viable in the sequence Z/D(EOP)D, resulting in savings of H2SO4 (8,5 kg/tsa) and NaOH (5 kg/tsa), but is not recommended in the sequence Z/ED(PO).
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spelling Hexenuronic acid and lignin effects on ozonolysis performance in different reaction pHsozonebrown pulpoxygen delignificationThe effect of pH on the performance of the ozonolysis stage in pulp production was evaluated for conventional and acid treated brown and oxygen delignified eucalyptus kraft pulps. The objective was to determine separately the effects of lignin and hexenuronic acid on the performance of the ozonolysis stage. The reaction of ozone with hexenuronic acid is less sensitive to pH than the reaction of ozone with lignin. The efficiency and the selectivity of the reaction of ozone with pulp decreases after removal of hexenuronic acids. Increasing up to 7.0 the pH during the ozonolysis is viable in the sequence Z/D(EOP)D, resulting in savings of H2SO4 (8,5 kg/tsa) and NaOH (5 kg/tsa), but is not recommended in the sequence Z/ED(PO).Univ Estadual Paulista, Dept Engn Ind Madeireira, BR-18409010 Itapeva, SP, BrazilUniv Fed Vicosa, Dept Engn Florestal, BR-36571000 Vicosa, MG, BrazilUniv Estadual Paulista, Dept Engn Ind Madeireira, BR-18409010 Itapeva, SP, BrazilSoc Brasileira QuimicaUniversidade Estadual Paulista (Unesp)Universidade Federal de Viçosa (UFV)Ventorim, GustavoColodette, Jorge Luiz2020-12-10T18:05:35Z2020-12-10T18:05:35Z2006-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article922-925Quimica Nova. Sao Paulo: Soc Brasileira Quimica, v. 29, n. 5, p. 922-925, 2006.0100-4042http://hdl.handle.net/11449/195857WOS:000240551700007Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporQuimica Novainfo:eu-repo/semantics/openAccess2021-10-23T12:19:08Zoai:repositorio.unesp.br:11449/195857Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T14:23:48.503612Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Hexenuronic acid and lignin effects on ozonolysis performance in different reaction pHs
title Hexenuronic acid and lignin effects on ozonolysis performance in different reaction pHs
spellingShingle Hexenuronic acid and lignin effects on ozonolysis performance in different reaction pHs
Ventorim, Gustavo
ozone
brown pulp
oxygen delignification
title_short Hexenuronic acid and lignin effects on ozonolysis performance in different reaction pHs
title_full Hexenuronic acid and lignin effects on ozonolysis performance in different reaction pHs
title_fullStr Hexenuronic acid and lignin effects on ozonolysis performance in different reaction pHs
title_full_unstemmed Hexenuronic acid and lignin effects on ozonolysis performance in different reaction pHs
title_sort Hexenuronic acid and lignin effects on ozonolysis performance in different reaction pHs
author Ventorim, Gustavo
author_facet Ventorim, Gustavo
Colodette, Jorge Luiz
author_role author
author2 Colodette, Jorge Luiz
author2_role author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
Universidade Federal de Viçosa (UFV)
dc.contributor.author.fl_str_mv Ventorim, Gustavo
Colodette, Jorge Luiz
dc.subject.por.fl_str_mv ozone
brown pulp
oxygen delignification
topic ozone
brown pulp
oxygen delignification
description The effect of pH on the performance of the ozonolysis stage in pulp production was evaluated for conventional and acid treated brown and oxygen delignified eucalyptus kraft pulps. The objective was to determine separately the effects of lignin and hexenuronic acid on the performance of the ozonolysis stage. The reaction of ozone with hexenuronic acid is less sensitive to pH than the reaction of ozone with lignin. The efficiency and the selectivity of the reaction of ozone with pulp decreases after removal of hexenuronic acids. Increasing up to 7.0 the pH during the ozonolysis is viable in the sequence Z/D(EOP)D, resulting in savings of H2SO4 (8,5 kg/tsa) and NaOH (5 kg/tsa), but is not recommended in the sequence Z/ED(PO).
publishDate 2006
dc.date.none.fl_str_mv 2006-09-01
2020-12-10T18:05:35Z
2020-12-10T18:05:35Z
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 Quimica Nova. Sao Paulo: Soc Brasileira Quimica, v. 29, n. 5, p. 922-925, 2006.
0100-4042
http://hdl.handle.net/11449/195857
WOS:000240551700007
identifier_str_mv Quimica Nova. Sao Paulo: Soc Brasileira Quimica, v. 29, n. 5, p. 922-925, 2006.
0100-4042
WOS:000240551700007
url http://hdl.handle.net/11449/195857
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv Quimica Nova
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 922-925
dc.publisher.none.fl_str_mv Soc Brasileira Quimica
publisher.none.fl_str_mv Soc Brasileira Quimica
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
_version_ 1808128355151642625

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