Process for generating stabilized bromine compounds
AssigneeUnited States Filter Corporation
InventorsVadim Zolotarsky, Irina A. Ivanter, Tamara Oustinskaya
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Abstract
Active bromine-containing solutions are produced and stabilized by reacting bromate and bromide salt solutions with an amino-complexing agent, such as sulfamic acid or sulfamate salt. The reaction is performed at a pH of less than 1 to create a complexed hypobromate. The pH of the active bromine-containing solution is raised to between 4 and 10 by adding an alkali to improve stability. Moreover, the solution is maintained below 30° C. during the alkali addition to retain bromine equivalent activity.
Claims69
A method for producing an active bromine solution comprising:
- providing a solution comprising a bromate salt;
- adding an amino-complexing agent to the solution;
- adjusting a pH of the solution to below about 1;
- adding a halide salt to the solution;
- and
- adjusting the pH of the solution to at least about 4.
A method for producing a biocide solution comprising:
- adding at least one of a sulfamate salt and sulfamic acid to a solution comprising a bromate salt;
- adding a halide salt to the solution;
- adding sulfuric acid to the solution to produce the biocide solution;
- and
- adding sodium hydroxide to the biocide solution while maintaining the biocide solution at less than about 30° C.
A biocide additive kit comprising:
- a first solution comprising a bromate salt and a bromide salt;
- a second solution comprising an amino-complexing agent and a mineral acid;
- and
- a third solution comprising an alkali.
A process for producing an active bromine solution comprising the steps of:
- providing a solution comprising a bromate salt;
- adding a halide salt to the solution;
- adding an amount of an amino-complexing agent to produce a bromate to amino-complexing agent molar ratio of at least about 3:1 to the solution;
- adding an amount of a mineral acid to adjust a pH of the solution to less than about 1;
- adding an amount of an alkali to adjust the pH of the solution to between about 4 and about 10;
- and
- maintaining the solution at less than about 30° C.
A biocide additive kit comprising:
- a first solution comprising a bromate salt;
- a second solution comprising an amino-complexing agent;
- a third solution comprising a halide salt;
- a fourth solution comprising a mineral acid;
- and
- a fifth solution comprising an alkali.
A method for producing a biocide solution comprising:
- adding at least one of a sulfamate salt and sulfamic acid to a solution comprising a bromate salt and a halide salt;
- adding sulfuric acid to produce the biocide solution;
- and
- adding sodium hydroxide to the biocide solution while maintaining the biocide solution at less than about 30° C.
A method for producing an active bromine solution comprising:
- providing a solution comprising a bromate salt and a halide salt;
- adding an amino-complexing agent to the solution;
- adjusting a pH of the solution to below about 1;
- and
- adjusting the pH of the solution to at least about 4.
A system for producing a biocide comprising:
- a vessel in fluid communication with a first reservoir comprising a bromate salt solution;
- a second reservoir in fluid communication with the vessel and comprising an amino-complexing agent solution;
- a third reservoir in fluid communication with the vessel and comprising an alkali;
- and fourth reservoir in fluid communication with the vessel and comprising a mineral acid.
Dependencies are inferred from the claim text.