Calgon Corporation

Daniel P Vanderpool

Charles Y Cha

Ann M Sherbondy

Susan P Rey

An alkylbenzotriazole, in combination with mercaptobenzotriazole, tolyltriazole, benzotriazole and/or 1-phenyl-5-mercaptotetrazole, is used to inhibit the corrosion of metallic surfaces, particularly copper surfaces, in contact with an aqueous system. Systems and compositions are also claimed.

Alkylbenzotriazole compositions and the use thereof as copper and copper

Polyether polyamino methylene phosphonates, which possess high calcium tolerance and have been found to give excellent inhibition of the formation, deposition and adherence of scale-forming salts, especially calcium carbonate, in aqueous systems involving severe conditions which include elevated pH, high dissolved solids content, and high saturation levels of calcium carbonate, are degraded by the oxidizing biocides bromine and chlorine used to control microbial growth in such aqueous systems. It has been found that organic sulfonamides provide excellent protection against such degradation when they are added to the aqueous system along with the polyether polyamino methylene phosphonate scale inhibitors.

Stabilization of polyether polyamino methylene phosphonate scale

A surface active composition for dispersing an oil in an aqueous media and/or for inhibiting deposition of oil on a surface of a water carrying system is disclosed. Preferably, the water carrying system is at least one system selected from the group consisting of a cooling tower, a cooling tower fill, means for heat exchange, means for industrial processing, and a body of water. A method for inhibiting deposition of an oil on a surface of a water carrying system is also provided.

Inhibiting deposition of oil on surface of water-carrying system

Aminomethylene phosphonates, which give excellent inhibition of the formation, deposition and adherence of scale-forming salts, especially calcium carbonate, in aqueous systems, are degraded by the oxidizing biocides bromine and chlorine used to control microbial growth in such aqueous systems. It has been found that organic sulfonamides provide excellent protection against such degradation when they are added to the aqueous system along with the aminomethylene phosphonate scale inhibitors.

Stabilization of aminomethylene phosphonate scale inhibitors against

Hydroxyalkylidene phosphonates, which give excellent inhibition of the formation, deposition and adherence of scale-forming salts, especially calcium carbonate, in aqueous systems, are degraded by the oxidizing biocides bromine and chlorine used to control microbial growth in such aqueous systems. It has been found that organic sulfonamides provide excellent protection against such degradation when they are added to the aqueous system along with the hydroxyalkylidene phosphonate scale inhibitors.

Stabilization of hydroxyalkylidene phosphonate scale inhibitors against

An alkoxybenzotriazole, in combination with mercaptobenzothiazole, tolyltriazole, benzotriazole, a substituted benzotriazole and/or 1-phenyl-5-mercaptotetrazole, is used to inhibit the corrosion of metallic surfaces, particularly copper surfaces, in contact with an aqueous system. Systems and compositions are also claimed.

Alkoxybenzotriazole compositions and the use thereof as copper and

The use of alkoxybenzotriazoles to inhibit the corrosion of metallic surfaces in contact with an aqueous system. Systems and compositions containing alkoxybenzotriazole are also claimed.

Copper and copper alloy corrosion inhibitors

A composition which is useful for inhibiting the corrosion of copper and copper alloy metals in contact with an aqueous system is disclosed. The composition comprises phenyl mercaptotetrazole and tolytriazole and/or benzotriazole.

Phenyl mercaptotetrazole/tolyltriazole corrosion inhibiting compositions

A polyphosphate in combination with an azole such as in alkyl or alkoxy benzotriazole, mercaptobenzothiazole, tolyltriazole, benzotriazole, a substituted benzotriazole and/or 1-phenyl-5-mercaptotetrazole, is used to inhibit the corrosion of metallic surfaces, particularly copper surfaces, in contact with an aqueous system. Systems and compositions are also claimed.

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Coraopolis, PA, United States of America

Daniel P Vanderpool