Process and composition for bleaching cellulosic material with hypochlorous acid
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United States of America Patent
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Apr 26, 1988
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N/A
app pub date -
Nov 25, 1985
filing date -
Nov 25, 1985
priority date (Note) -
Expired
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Abstract
A process and composition especially suited for bleaching wood pulp characterized by the use of hypochlorous acid in combination with chlorine dioxide and/or a nitrogen compound having the characteristic of minimizing fiber degradation and enhancing fiber brightness. The preferred composition is in an aqueous solution adjusted to an optimum pH and is used as a direct replacement for conventional compositions so as to effect substantial savings in the costs of chemicals and energy per ton of bleached pulp.
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