A novel approach for the oxidative catalysis employing polyoxometalate-laccase system: application to the oxygen bleaching of kraft pulp

• Tipo: Artigo em Revista Científica Internacional
• Data: 2004

Autores

Ana P.M. Tavares (Autor) FEUP; José A. F. Gamelas (Autor) Outra; Armindo R. Gaspar (Autor) Outra; Dmitry V. Evtuguin (Autor) Outra; Ana M. R. B. Xavier (Autor) Outra

Revista

Título: Catalysis Communications

Vol. 5 Nº 9

Páginas: 485-489

ISSN: 1566-7367

Editora: Elsevier

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Outras ciências da engenharia e tecnologias

Outras Informações

DOI: 10.1016/j.catcom.2004.06.002

Abstract (EN): A novel approach for the catalytic oxygen bleaching of kraft pulp using the heteropolyanion [SiW11MnIII(H2O)O-39](5-) (SiW11 Mn-III) and laccase of Trametes versicolor is proposed. The oxidation of the residual lignin in pulp with the heteropolyanion was followed by the catalyst re-oxidation by laccase in a separate stage. The alterative treatment in a multi-stage process with SiW11MnIII at 110 degreesC and with laccase at 45 degreesC allowed a sustainable eucalypt kraft pulp delignification with removal of about 50% of the residual lignin with minimal polysaccharides damage. Heteropolyanion maintained stable after redox turnovers during the treatments. (C) 2004 Elsevier B.V. All rights reserved.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 5