Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Gas – vapor or mist contact
Patent
1986-09-03
1988-07-12
Straub, Gary P.
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Gas, vapor or mist contact
162 65, 162 78, 162 79, 210763, 210928, 423513, D21C 300, C02F 168, C01B 1506
Patent
active
047568003
ABSTRACT:
A method of producing salts of monoperoxysulfuric acid comprising reacting together, in the presence of a catalyst consisting of cupric ions in a concentration of at least 0.01 part per milion, (a) a solution of aerated water having a pH of from about 8 to about 14, and (b) a sulfur-containing reactant, wherein said reactant comprises sulfur dioxide or a sulfite. If a pulp is added to the reaction mixture and the cupric ion concentration is increased, the monoperoxysulfuric acid salts that are genrated in situ in the reaction mixture will simultaneously bleach the pulp.
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McSweeny James D.
Springer Edward L.
Fado John D.
Silverstein M. Howard
Straub Gary P.
The United States of America as represented by the Secretary of
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