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Please use this identifier to cite or link to this item: http://hdl.handle.net/10400.5/1717

Title: New highly efficient method of polyoxometalate (POM) catalyzed ozone bleaching of industrial eucalypt (E. globulus) kraft pulp
Authors: Pereira, Helena
Shatalov, Anatoly
Keywords: eucalyptus globulus
kraft pulp
bleaching
polyoxometalate catalyzed ozonation
Issue Date: Oct-2009
Publisher: SPCF
Citation: Shatalov, A.; Pereira, H. - New highly efficient method of polyoxometalate (POM) catalyzed ozone bleaching of industrial eucalypt (E. globulus) kraft pulp. In Congresso Florestal Naciona, 6º, Ponta Delgada, 2009 - A floresta num mundo globalizado
Abstract: The highly efficient and selective environmentally benign bleaching approach using polyoxometalate (POMs) catalyzed ozonation of chemical pulps in organic solvent reaction media has been developed. The Keggin-type molybdovanadophosphate heteropolyanions (HPAs) showed a well-defined capacity for ozonation improvement in the presence of number polar low-boiling aprotic and protic organic solvents. Under optimized conditions, the solvent-based HPA-catalyzed ozone bleaching of industrial eucalypt kraft pulp showed remarkable brightness improvement by 15.1% ISO, with additional lignin removal by 39.4% and increase in intrinsic viscosity by 3% in comparison with conventional ozone bleaching technique.
URI: http://hdl.handle.net/10400.5/1717
Appears in Collections:DEF - Comunicações em Actas de Conferências

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