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

• Type: Article in International Scientific Journal
• Date: 2004

Authors

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

Journal

Title: Catalysis Communications

Vol. 5 No. 9

Pages: 485-489

ISSN: 1566-7367

Publisher: Elsevier

Scientific classification

FOS: Engineering and technology > Other engineering and technologies

Other information

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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5