Efeito dos ácidos hexenurônicos e da lignina no desempenho da ozonólize, em diferentes pHs da reação

dc.contributorUniversidade Estadual Paulista (Unesp)
dc.contributorUniversidade Federal de Viçosa (UFV)
dc.date.accessioned2014-05-20T15:10:21Z
dc.date.accessioned2022-10-05T15:33:02Z
dc.date.available2014-05-20T15:10:21Z
dc.date.available2022-10-05T15:33:02Z
dc.date.created2014-05-20T15:10:21Z
dc.date.issued2006-10-01
dc.identifierQuímica Nova. Sociedade Brasileira de Química, v. 29, n. 5, p. 922-925, 2006.
dc.identifier0100-4042
dc.identifierhttp://hdl.handle.net/11449/27599
dc.identifier10.1590/S0100-40422006000500007
dc.identifierS0100-40422006000500007
dc.identifierS0100-40422006000500007.pdf
dc.identifier3238357061477589
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/3900508
dc.description.abstractThe 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).
dc.languagepor
dc.publisherSociedade Brasileira de Química
dc.relationQuímica Nova
dc.relation0.646
dc.relation0,255
dc.rightsAcesso aberto
dc.sourceSciELO
dc.subjectozone
dc.subjectbrown pulp
dc.subjectoxygen delignification
dc.titleEfeito dos ácidos hexenurônicos e da lignina no desempenho da ozonólize, em diferentes pHs da reação
dc.typeArtigo


Este ítem pertenece a la siguiente institución