System and method for generation of point of use reactive oxygen species
First Claim
1. A method for generating a reactive oxygen species formulation, comprising:
- generating an alkaline hydrogen peroxide solution;
mixing the alkaline hydrogen peroxide solution with an acyl donor such that a peracid concentrate is produced, wherein when the alkaline hydrogen peroxide solution and the acyl donor are mixed, the peracid concentrate has a molar ratio of hydrogen peroxide to acyl donor reactive groups ranging from about 1;
1.25 to about 1.4, and maintaining, thereafter, the peracid concentrate pH value in a range from about pH 9.5 to about pH 12.5 until distributing the reactive oxygen species, and wherein the peracid concentrate has minimal hydrogen peroxide residual to minimize quenching of singlet oxygen.
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Abstract
Systems and methods for generating reactive oxygen species formulations useful in various oxidation applications. Exemplary formulations include singlet oxygen or superoxide and can also contain hydroxyl radicals or hydroperoxy radicals, among others. Formulations can contain other reactive species, including other radicals. Exemplary formulations containing peracids are activated to generate singlet oxygen. Exemplary formulations include those containing a mixture of superoxide and hydrogen peroxide. Exemplary formulations include those in which one or more components of the formulation are generated electrochemically. Formulations of the invention containing reactive oxygen species can be further activated to generate reactive oxygen species using activation chosen from a Fenton or Fenton-like catalyst, ultrasound, ultraviolet radiation or thermal activation. Exemplary applications of the formulations of the invention among others include: cleaning in place applications, water treatment, soil decontamination and flushing of well casings and water distribution pipes.
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Citations
14 Claims
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1. A method for generating a reactive oxygen species formulation, comprising:
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generating an alkaline hydrogen peroxide solution; mixing the alkaline hydrogen peroxide solution with an acyl donor such that a peracid concentrate is produced, wherein when the alkaline hydrogen peroxide solution and the acyl donor are mixed, the peracid concentrate has a molar ratio of hydrogen peroxide to acyl donor reactive groups ranging from about 1;
1.25 to about 1.4, and maintaining, thereafter, the peracid concentrate pH value in a range from about pH 9.5 to about pH 12.5 until distributing the reactive oxygen species, and wherein the peracid concentrate has minimal hydrogen peroxide residual to minimize quenching of singlet oxygen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification