Betz Laboratories, Inc.

James L Soos

Alexander C McDonald

Roger D Moulton

This invention relates to a method of transporting and inhibiting the deposition of copper and copper-iron materials on heat transfer devices in steam generating systems. This method utilizes a thermally stable chelant and a carboxylated polymeric dispersant as the treatment agents. Representative chemicals are 1,10-phenanthroline and 9:1 methacrylic acid/acrylic acid copolymer.

Transport and deposit inhibition of copper in boilers

A method for treatment of boiler waters is disclosed. The method comprises a synergetic combination of ametacrylic acid-containing polymer with a strongly interacting nonionic surfactant, together with a chelant and/or a phosphate-generating species. The method is particularly effective when the surfactant is an alkoxylated alkylphenol or an alkoxylated alkylphenol ether.

Boiler water treatment

A composition for treatment of boiler waters is disclosed. The composition comprises a synergetic combination of a methacrylic acid-containing polymer with a strongly interacting nonionic surfactant, together with a chelant and/or a phosphate-generating species. The composition is particularly effective when the surfactant is an alkoxylated alkylphenol or an alkoxylated alkylphenol ether.

Boiler water treatment composition

A method for treatment of boiler waters is disclosed. The method comprises a synergetic combination of a methacrylic acid-containing polymer with a strongly interacting nonionic surfactant, together with a chelant and/or a phosphate-generating species. The method is particularly effective when the surfactant is an alkoxylated alkylphenol or an alkoxylated alkylphenol ether.

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Conroe, TX, United States of America

James L Soos