Highly concentrated bromine compositions and methods of preparation
AssigneeEnviro Tech Chemical Services, Inc.
InventorsJonathan Howarth, Michael Harvey
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Abstract
Liquid and solid bromine-containing compositions are described. A liquid mixed halogen composition is also described. The highly concentrated liquid compositions and the high-activity solid compositions have excellent physical and chemical stability. The compositions are effective biocides in water treatment. Methods of preparing the compositions are also disclosed. These include combining a bromine compound in the oxidation state of −1 with hydrogen peroxide and a complexing agent followed by the addition of an alkaline source. The methods may further include the use of a solid organic or solid inorganic halogenating agent, conducting a solid-liquid separation, and adding an alkaline source.
Claims104
A method of preparing a liquid, bromine-containing solution, comprising:
- a. combining a complexing agent, hydrogen peroxide, and anhydrous hydrogen bromide gas;
- and
- b. adding an alkaline source.
A method of preparing a liquid, bromine-containing solution, comprising:
- a. combining a source of bromide ions, hydrogen peroxide, and a complexing agent;
- and
- b. adding an alkaline source.
A method of preparing a liquid bromine- and chlorine-containing solution, comprising:
- a. combining a source of bromine ions, hydrogen peroxide and a complexing agent;
- b. adding a first alkaline source and a solid chlorinating agent;
- c. conducting a solid-liquid separation;
- and
- d. adding a second alkaline source.
A method of preparing a liquid, bromine-containing solution, comprising:
- a. combining a source of bromide ions, a complexing agent, and a solid halogenating agent;
- b. conducting a solid-liquid separation;
- and
- c. adding an alkaline source.
A method of preparing a liquid bromine- and chlorine-containing solution, comprising:
- a. combining a source of bromide ions, a complexing agent, and a solid chlorinating agent;
- b. conducting a solid-liquid separation;
- and
- c. adding an alkaline source.
A method of preparing a bromine-containing solid, comprising:
- a. combining a bromine compound in the oxidation state of −1, hydrogen peroxide, and a complexing agent;
- b. adding an alkaline source;
- and
- c. promoting crystallization of a bromine-containing solid.
A method of preparing a bromine-containing solid in equilibrium with its saturated solution, comprising:
- a. combining a bromine compound in the oxidation state of −1, hydrogen peroxide, and a complexing agent;
- b. adding an alkaline source;
- c. promoting crystallization of a bromine-containing solid;
- and
- d. recovering a slurry of said bromine-containing solid in equilibrium with its saturated solution.
A method of preparing a bromine-containing solid, comprising:
- a. combining a source of bromide ions, a complexing agent, a first alkaline source, and a solid, organic halogenating agent;
- b. conducting a solid-liquid separation;
- c. adding a second alkaline source;
- and
- d. promoting crystallization of a bromine-containing solid.
A method of preparing a bromine-containing solid in equilibrium with its saturated solution, comprising:
- a. combining the source of bromide ions, a complexing agent, a first alkaline source, and a solid, organic halogenating agent;
- b. conducting a solid-liquid separation;
- c. adding a second alkaline source;
- d. promoting crystallization of a bromine-containing solid;
- and
- e. recovering a slurry of said bromine-containing solid in equilibrium with its saturated solution.
A bromine-containing liquid, having an active ingredient content of at least about 18% as Br2 (8% as Cl2).
A bromine-containing liquid, prepared to contain between zero and about one mole of dissolved halide ion salts per mole of active halogen.
A bromine- and chlorine-containing liquid, having a total halogen content of at least about 2.25% when expressed as Br2 (1% when expressed as Cl2).
A solid composition of matter, comprising the salt of N-bromosulfamate.
Dependencies are inferred from the claim text.