Process for the electrochemical reductive bleaching of lignocell

Details Process for the electrochemical reductive bleaching of lignocell Process for the electrochemical reductive bleaching of lignocell

1987-06-17

1989-01-10

Alvo, Steve

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Utilizing electrical or radiant energy

162 72, 162 79, D21C 910

Patent

active

RE0328251

ABSTRACT:
Reductive bleaching of lignin containing pulps employing polydentate ligand complexes of dipositive vanadium, chromium and titanium. High brightness pulps with good reversion stability are obtained. The process is essentially polution free as the reduced complexes can be repeatedly regenerated electrochemically.

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02440, Chelating Agents & Metal Chelates; Academic Press New York and London 1964.
Characterization of Chromophoric Groups in Groundwood and Lignin Model Compounds by Reaction with Specific Reducing Agents; Technical Paper T154; R. A. Fleury, and W. H. Rapson, University of Toronto, Toronto, Ont.

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