Nalco Chemical Company

Other

Great Lakes Chemical Corporation

Anthony W Dallmier

William F McCoy

Shunong Yang

Andrew J Cooper

Robert E McCarthy

Eric R Myers

Enrico J Termine

Alan M Yeoman

Robert F Kelly

F Philip Yu

Xi Ma

Howard Raymond Barnes

Eric J Allain

A method to extend the shelf-life, reduce the microbial load, and enhance product appearance and quality in leafy vegetables or other fresh commodities of the like comprising applying directly to the leafy vegetable a stabilized aqueous alkali or alkaline earth metal hypobromite solution.

Method to improve quality and appearance of leafy vegetables by using stabilized bromine

Stable biocide formulations containing oxidizing bromine are provided for biofouling control in industrial water systems. The formulations contain at least one stable oxidizing bromine compound that is prepared from at least one oxidizing chemical reagent, at least one bromine source and at least one bromine or halogen stabilizer. The resulting products are a mixture of stable oxidizing bromine compounds that can be used as a biocide in an industrial water system.

Stable oxidizing bromine formulations, method of manufacture and uses thereof for biofouling control

A synergistic composition and method for controlling biological growth in industrial fluids are disclosed, wherein the composition comprises stabilized sodium hypobromite and at least one compound selected from the group consisting of coco alkyldimethylamine oxide, n-coco alkyltrimethylenediamine, tetra-alkyl phosphonium chloride, 7-oxabicyclo&lsqb;2.2.1&rsqb;heptane-2,3-dicarboxylic acid and 4,5-dichloro-2-n-octyl-4-isothiazoline-3-one.

Composition and method for controlling biological growth using stabilized sodium hypobromite in synergistic combinations

Biological fouling is effectively controlled in water systems and process streams through the addition of hops extract.

Compositions containing hops extract and their use in water systems and process streams to control biological fouling

A synergistic composition and method for inhibiting microbiological growth which comprises a combination of stabilized sodium hypobromite with a mixture of 5-chloro-2-methyl 4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one.

Composition and method for inhibiting the growth of microorganisms including stabilized sodium hypobromite and isothiazolones

Stable oxidizing bromine compounds are prepared by preparing a caustic solution comprising a halogen stabilizer, water and an alkali or alkaline earth metal hydroxide, the halogen stabilizer being selected from the group consisting of R&mdash;NH,, R&mdash;NH&mdash;R,, R&mdash;SO,&mdash;NH,, R&mdash;SO,&mdash;NHR,, R&mdash;CO&mdash;NH,, R&mdash;CO&mdash;NH&mdash;R,and R&mdash;CO&mdash;NH&mdash;CO&mdash;R,wherein R is a hydroxy group, an alkyl group or an aromatic group and R,is an alkyl group or an aromatic group, adding bromine chloride to the solution while mixing the solution, and cooling the solution.

Stabilized bromine solutions are prepared by combining a bromine source and a stabilizer to form a mixture, adding an oxidizer to the mixture, and then adding, an alkaline source to adjust the pH of the mixture to at least 13.

Stabilized bromine solutions, method of manufacture and uses thereof for biofouling control

Stable oxidizing bromine formulations, method of manufacture and uses

The invention is a method for preparing a stabilized aqueous alkali or alkaline earth metal hypobromite solution. The method comprises the steps of:

Process to manufacture stabilized alkali or alkaline earth metal

Stable oxidizing bromine compounds are prepared by preparing a caustic solution comprising a halogen stabilizer, water and an alkali or alkaline earth metal hydroxide, the halogen stabilizer being selected from the group consisting of R--NH.sub.2, R--NH--R.sup.1, R--SO.sub.2 --NH.sub.2, R--SO.sub.2 --NHR.sup.1, R--CO--NH.sub.2, R--CO--NH--R.sup.1 and R--CO--NH--CO--R.sup.1 wherein R is a hydroxy group, an alkyl group or an aromatic group and R.sup.1 is an alkyl group or an aromatic group, adding bromine chloride to the solution while mixing the solution, and cooling the solution.

A method is disclosed for removing biofilms from surfaces submerged in a fouled water system by adding to the water system an alkyl polyglycoside having the chemical formula: ##STR1## wherein R is a C.sub.8 -C.sub.16 alkyl chain and DP is from 0 to 3 carbohydrate units.

Method of removing biofilms from surfaces submerged in a fouled water

A stabilized aqueous alkali or alkaline earth metal hypobromite solution is prepared by mixing an aqueous solution of alkali or alkaline earth metal hypochlorite having from about 5 percent to about 70 percent available halogen as chlorine with a water soluble bromide ion source; allowing the bromide ion source and the alkali or alkaline earth metal hypochlorite to react to form a 0.5 to 70 percent by weight aqueous solution of unstabilized alkali or alkaline earth metal hypobromite; adding to the unstabilized solution of alkali or alkaline earth metal hypobromite a suitable stabilizer such as a carbonic acid, hydrogen cyanide, carboxylic acid, amino acid, sulfuric acid, phosphoric acid or boric acid; and recovering a stabilized aqueous alkali or alkaline earth metal hypobromite solution.

Composition and method for inhibiting the growth of microorganisms

Stable solutions of bromonitromethane are prepared and shown to be useful as an antimicrobial in a broad spectrum of applications. Bromonitromethane is applied using a stable aqueous solution or is generated from products which act as bromonitromethane donors. Bromonitromethane solutions are stabilized by the addition of a mineral acid.

Stabilized solutions of bromonitromethane and their use as biocides

The invention is a method for preparing a stabilized aqueous alkali or alkaline earth metal hypobromite solution. The method comprises the steps of: a. Mixing an aqueous solution of alkali or alkaline earth metal hypochlorite having from about 5 percent to about 70 percent available halogen as chlorine with a water soluble bromide ion source; b. Allowing the bromide ion source and the alkali or alkaline earth metal hypochlorite to react to form a 0.5 to 70 percent by weight aqueous solution of unstabilized alkali or alkaline earth metal hypobromite; c. Adding to the unstabilized solution of alkali or alkaline earth metal hypobromite an aqueous solution of an alkali metal sulfamate in a quantity to provide a molar ratio of alkali metal sulfamate to alkali or alkaline earth metal hypobromite is from about 0.5 to about 7; and, d. Recovering a stabilized aqueous alkali or alkaline earth metal hypobromite solution.

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Aurora, IL, United States of America

Anthony W Dallmier