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

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorUniversidade Federal de Viçosa (UFV)-
Autor(es): dc.creatorVentorim, Gustavo-
Autor(es): dc.creatorColodette, Jorge Luiz-
Data de aceite: dc.date.accessioned2022-02-22T00:07:07Z-
Data de disponibilização: dc.date.available2022-02-22T00:07:07Z-
Data de envio: dc.date.issued2020-12-09-
Data de envio: dc.date.issued2020-12-09-
Data de envio: dc.date.issued2006-09-01-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/195857-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/195857-
Descrição: dc.descriptionThe 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).-
Descrição: dc.descriptionUniv Estadual Paulista, Dept Engn Ind Madeireira, BR-18409010 Itapeva, SP, Brazil-
Descrição: dc.descriptionUniv Fed Vicosa, Dept Engn Florestal, BR-36571000 Vicosa, MG, Brazil-
Descrição: dc.descriptionUniv Estadual Paulista, Dept Engn Ind Madeireira, BR-18409010 Itapeva, SP, Brazil-
Formato: dc.format922-925-
Idioma: dc.languagept_BR-
Publicador: dc.publisherSoc Brasileira Quimica-
Relação: dc.relationQuimica Nova-
???dc.source???: dc.sourceWeb of Science-
Palavras-chave: dc.subjectozone-
Palavras-chave: dc.subjectbrown pulp-
Palavras-chave: dc.subjectoxygen delignification-
Título: dc.titleHexenuronic acid and lignin effects on ozonolysis performance in different reaction pHs-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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