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Non-Chlorine Bleaching of Wood Pulps Mediated by Heteropolyoxometalates

  • Ira A. Weinstock
  • James L. Minor
  • Rajai H. Atalla

Abstract

Wood consists primarily of carbohydrates (cellulose and some hemicelluloses) and lignin. In the production of chemical pulps, used in the manufacture of high quality paper, most of the lignin is removed by reaction with alkaline sulfide. At the elevated temperatures used in pulping, chemical reactions of lignin give rise to highly colored conjugated aromatic structures that remain within the wood cell (fiber) walls. The purpose of bleaching is to degrade or remove these chromophores along with remaining lignin.

Keywords

Benzylic Alcohol Kappa Number Residual Lignin Porphyrin Complex Alkaline Hydrogen Peroxide 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Springer Science+Business Media New York 1993

Authors and Affiliations

  • Ira A. Weinstock
    • 1
  • James L. Minor
    • 1
  • Rajai H. Atalla
    • 1
  1. 1.Forest Products LaboratoryU.S. Dept. of AgricultureMadisonUSA

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