Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Treatment with particular chemical
Patent
1992-05-19
1993-07-13
Jones, W. Gary
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Treatment with particular chemical
162 79, 162 80, D21C 910
Patent
active
052270220
ABSTRACT:
A process is disclosed for bleaching wood pulp, cellulose or used paper by treatment the fibre material to be bleached before the bleaching steps with a natural or synthetic zeolite or a layer lattice silicate and an easily decomposable organic complex forming agent, e.g. citric acid.
REFERENCES:
patent: 4238282 (1980-12-01), Hyde
patent: 5039377 (1991-08-01), Von Raven et al.
Glaum Holger
Leonhardt Wolfgang
Schmidt Kurt
Suess Hans U.
Degussa - Aktiengesellschaft
Jones W. Gary
Nguyen Dean Tan
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