Influência do número kappa, dos ácidos hexenurônicos e da lignina no desempenho da deslignificação com oxigênio
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Data
2006-10-25
Autores
Ventorim, Gustavo [UNESP]
Oliveira, Kátia Dionísio
Colodette, Jorge Luiz
Da Costa, Marcelo Moreira
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Resumo
This study aimed at determining the effect of kappa number, lignin and hexenuronic acid contents on oxygen stage performance. Industrial brown pulps produced by the ITC and KobudoMARI cooking technologies, of kappa number and HexA's contents varying in the range of 10-21.7 and 23.2-56.7 mmol/kg, respectively, were collected in a period of 6 months and delignified with oxygen under fixed conditions. Kappa number was fractionated into lignin and hexenuronic acid and each fraction correlated with oxygen stage performance. It was concluded that O-stage efficiency, selectivity and yield does not correlate significantly with kappa number, lignin or hexenuronic acid contents for the ITC and KobudoMARI pulps at 5% of significance.
Descrição
Palavras-chave
Hexenuronic acid, Lignin, Oxygen delignification, Yield pulp, Oxygen stage, Stage efficiency, Delignification, Fractionation, Oxygen, Pulp materials, Hexenuronic Acid, Lignins, Pulps
Como citar
Scientia Forestalis/Forest Sciences, n. 71, p. 87-97, 2006.