Bleaching compositions and processes employing sulfamates and po

Details Bleaching compositions and processes employing sulfamates and po Bleaching compositions and processes employing sulfamates and po

1995-01-30

1997-07-08

Spear, Frank

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Treatment with particular chemical

162 78, 162 90, D21C 108

Patent

active

056456883

ABSTRACT:
Pulp bleaching processes employing peroxides and/or oxygen are improved by using bleaching additives, preferably before the application of the peroxide and/or oxygen. The bleaching additives contain at least one alkali metal sulfamate such as a sodium sulfamate and a polyaminocarboxylic acid such as DTPA or a salt thereof, such as sodium DTPA.

REFERENCES:
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patent: 3801512 (1974-04-01), Solenberger
patent: 4619663 (1986-10-01), Tatin
patent: 4732650 (1988-03-01), Michalowski et al.
patent: 4740212 (1988-04-01), Yant et al.
patent: 4849053 (1989-07-01), Gentile, Jr. et al.
patent: 4938842 (1990-07-01), Whiting et al.
patent: 4959075 (1990-09-01), Baehr et al.

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