Patent ID: 8012411

Claim:
A method of decontaminating cloud of toxic material, comprising: generating a co-dispersion of two different droplet size distributions of negatively-charged droplets of DF-200 aqueous decontamination formulation; and contacting and chemically reacting the DF-200 droplets with the cloud of toxic material to neutralize and render the toxic cloud harmless; wherein the DF-200 aqueous decontamination formulation comprises: a solubilizing agent selected from the group consisting of a cationic surfactant, a cationic hydrotrope, and a fatty alcohol; a reactive compound selected from the group consisting of hydrogen peroxide, urea hydrogen peroxide, hydroperoxycarbonate, peracetic acid, sodium perborate, sodium peroxypyrophosphate, sodium peroxysilicate, and sodium percarbonate; a bleaching activator selected from the group consisting of O-acetyl, N-acetyl, and nitrile group bleaching activators; and water; and wherein the co-dispersion comprises two different drop size distributions; (1) a small droplet size distribution, and (2) a large droplet size distribution; wherein the small droplet size distribution is chosen to provide optimum neutralization of the toxic material, and the large droplet size distribution is chosen to hasten the fallout of the small droplets; wherein generating the co-dispersion of the two different droplet size distributions comprises spraying the DF-200 formulation through two different size spray nozzles that are positioned side-by-side; wherein the small droplet size distribution has a mean size that ranges from 1 to 20 microns; and wherein the large droplet size distribution has a mean size that ranges from 10 to 100 microns.