Use of sulfamic acid or its salts as stabilizers especially in combination with ammonium salt and/or ammine for bleach or other halogen containing biocides in the paper area
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United States of America Patent
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Feb 23, 2016
Grant Date -
Apr 25, 2013
app pub date -
Nov 4, 2011
filing date -
Oct 21, 2011
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Abstract
The invention is directed to compositions and methods of their use as effective biocidal agents for water streams. The composition comprises a halogen source, halogen stabilizers containing a sulfur bearing species and ammonium salts/urea, and an alkali. The sulfur bearing species includes sulfamic acid or its salt equivalent. By having optimized mixing ratio of halogen to stabilizer and that of ammonium salts to sulfamic acid or sulfamate, a synergistic effect occurs which both increases the efficacy of the composition as a biocide and it avoids adverse impacts on other chemicals that are present in the water stream. Best of all the composition is easy to form and easy to introduce into a water stream of concern. Its introduction can be as simple as mixing two containers of reagent prior to introduction to the water process stream.
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