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

dc.contributorUniversidade Estadual Paulista (Unesp)
dc.contributorUniversidade Federal de Viçosa (UFV)
dc.date.accessioned2020-12-10T18:05:35Z
dc.date.accessioned2022-12-19T20:09:39Z
dc.date.available2020-12-10T18:05:35Z
dc.date.available2022-12-19T20:09:39Z
dc.date.created2020-12-10T18:05:35Z
dc.date.issued2006-09-01
dc.identifierQuimica Nova. Sao Paulo: Soc Brasileira Quimica, v. 29, n. 5, p. 922-925, 2006.
dc.identifier0100-4042
dc.identifierhttp://hdl.handle.net/11449/195857
dc.identifierWOS:000240551700007
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/5376495
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.publisherSoc Brasileira Quimica
dc.relationQuimica Nova
dc.sourceWeb of Science
dc.subjectozone
dc.subjectbrown pulp
dc.subjectoxygen delignification
dc.titleHexenuronic acid and lignin effects on ozonolysis performance in different reaction pHs
dc.typeArtículos de revistas


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