Nalco Chemical Company

Nalco Company

Ondeo Nalco Company

Shunong Yang

William F McCoy

Anthony W Dallmier

Donald A Johnson

Kun Xiong

Robert L Wetegrove

Barbara E Moriarty

Mita Chattoraj

David A Grattan

Narasimha M Rao

Eric R Myers

Tzu-Yu Chen

George J Collias

Eric J Allain

Michael V Enzien

May M Wu

Bhasker B Dave

A method to control a cooling water system based on the rate of consumption of fluorescent polymer is described and claimed. The method includes providing a cooling water system and a water treatment product including at least one fluorescent polymer and a fluorescent tracer. Measuring the fluorescence of the fluorescent polymer and calculating its rate of consumption provides a way of determining whether to adjust one or more operating parameters in the cooling water system.

Control of cooling water system using rate of consumption of fluorescent polymer

Stabilized bromine solutions are prepared by combining a bromine source and a stabilizer to form a mixture, and then adding an oxidizer to the mixture.

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

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

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 controlling biofouling in an aqueous medium by treating the aqueous medium with an oil-in-water emulsion comprising an antimicrobial oil phase and at least one emulsifier. This method efficiently controls biofouling in the aqueous medium by specifically targeting the antimicrobial oil phase directly to biofilms, cell surfaces and cell aggregates in a concentrated form.

Method of controlling biofouling in aqueous media using antimicrobial

Stable oxidizing biocide formulations containing 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 primary or secondary biocide in an industrial water system.

Stable oxidizing bromine formulations, methods of manufacture thereof

A sunlight-ultraviolet-stable biocide composition for use in treating recreational and industrial water systems is disclosed which comprises an oxidizing halogen compound and a stabilizer, wherein the stabilizer is either benzenesulfonamide or a derivative thereof.

Growing community of inventors

Naperville, IL, United States of America

Shunong Yang