Patent ID: 7578968

Claim:
A process for effecting biocidal activity in an aqueous well fracturing fluid, which process comprises blending with said aqueous well fracturing fluid a biocidally-effective amount of a sulfamate stabilized, bromine-based biocide formed from (A) a halogen source which is (i) bromine chloride, (ii) bromine and chlorine, (iii) bromine, or (iv) a mixture of any two or more of (i), (ii), and (iii), (B) a source of sulfamate anions, (C) alkali metal base, and (D) water, in amounts so that prior to blending said biocide has an active bromine content of at least 50,000 ppm, and an atom ratio of nitrogen to active bromine originating from (A) and (B) that is greater than about 0.93.