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US 2014/0178501 A1Published application
Biocides and apparatus
AssigneeA.Y. Laboratories Ltd.
InventorAyala BARAK
Life of this patent
Estimating the term…
Abstract
A method for controlling microbial or biofilm growth in a medium includes mixing ammonium carbamate or ammonium sulfamate with an aqueous solution of a hypochlorite oxidant to form a biocide having a pH between 9.0 and 11.5, the molar ratio of the ammonium carbamate or ammonium sulfamate to the hypochlorite being at least 1:1; and then applying the biocide to the medium.
Claims20
A method for controlling microbial or biofilm growth in a medium, the method comprising:
- mixing a nitrogen-containing compound selected from ammonium carbamate and ammonium sulfamate, and an aqueous solution of a hypochlorite oxidant to form a biocide,
- wherein the molar ratio of said nitrogen-containing compound to said hypochlorite is at least 1:1, and
- after said mixing, applying said biocide to said medium,
- wherein said biocide has a pH of between 9.0 and 11.5 immediately prior to being applied to said medium.
1 more element
Apparatus for applying a biocide to a medium, comprising:
- a nitrogen-containing compound reservoir containing a nitrogen-containing compound selected from ammonium carbamate and ammonium sulfamate;
- a source of hypochlorite oxidant dilution having a concentration of between not more than 24,000 ppm as total chlorine,
- and a mixing chamber operable to mix the dilution and the nitrogen-containing compound or mixture thereof in a molar ratio of nitrogen atoms in the nitrogen-containing compound to the hypochlorite of at least 1:1, to produce the biocide in the mixing chamber, and wherein said biocide has a pH of between 9.0 and 11.5 immediately prior to being applied to said medium.
A method for controlling microbial or biofilm growth in a medium, the method comprising:
- mixing a nitrogen-containing compound selected from ammonium carbamate and ammonium sulfamate, a bromide and an aqueous solution of a hypochlorite oxidant to form a biocide,
- wherein the molar ratio of said nitrogen-containing compound to said hypochlorite is at least 1:1,
- and after said mixing, applying said biocide to said medium,
- wherein said biocide has a pH of between 9.0 and 11.5 immediately prior to being applied to said medium.
1 more element
Dependencies are inferred from the claim text.