Importance

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Abstract

The present invention is directed to convenient methods of preparing: (1) highly concentrated liquid bromine-containing biocidal solutions and (2) highly concentrated mixed halogen liquid bromine and chlorine-containing biocidal solutions that have excellent physical and chemical stability. One method involves adding the acidic reaction medium to an alkaline source to effect the final pH adjustment and in another these are co-fed into a common reaction vessel. Both methods minimize the incidence of the acid hydrolysis reaction that undermines chemical yields and generates troublesome sulfate by-products. The methods offer superior reactor cooling efficiencies that reduce batch cycle times and suppress undesirable elevated temperature decomposition reactions.

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First Claim