Patent ID: 6506418
Filing Date: 2003-01-14
Classification: A01N,C01B,C02F

Abstract:
A process of producing a concentrated liquid biocide composition, which process comprises:A) bringing together in any feasible manner to form a reaction mixture (a) bromine atoms and chlorine atoms in the form of one or more of (i) bromine chloride, (ii) elemental bromine, and (iii) elemental chlorine, (b) a source of sulfamate anions, (c) alkali metal base, and (d) water, such that the numerical ratio of bromine atoms to chlorine atoms brought to the mixture is in the range of about 0.7:1 to about 1.7:1; and B) providing before and/or during A) enough alkali metal base in the mixture being formed in A) to keep the pH of such mixture in the range of about 7 to about 11 during all or substantially all of the time feeding in A) is occurring, the amounts of (a), (b), (c), and (d) used being amounts that form an active-bromine-containing solution in which (i) the active bromine content is at least about 50,000 ppm (wt/wt) and (ii) the atom ratio of nitrogen to active bromine originating from (a) and (b) is greater than about 0.93; and wherein if any sulfate is present in the active-bromine-containing solution as formed, such sulfate content is such that the molar ratio of sulfate to sulfamate in the solution is less than about 0.2.