Betz Laboratories, Inc.

Roger D Moulton

Paul R Burgmayer

William S Carey

Alan E Goliaszewski

Michael A Cady

Sydia B Anderson

Alexander C McDonald

James L Soos

An improved oxygen scavenger for aqueous mediums is disclosed which is a disubstituted, water soluble azo compound.

Method of scavenging oxygen from an aqueous medium

Methods are provided for simultaneously inhibiting the corrosion of iron-containing and copper-containing metals in contact with boiler feedwaters. The methods comprise adding an effective amount of 1,10-phenanthroline to the boiler feedwater system for which corrosion inhibition is desired.

Methods for inhibiting the corrosion of iron-containing and

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

An improved method of electroanalytical detection of residual hydroquinone in boiler feedwater employing adding an ionic base and a copper chelant to the feedwater sample. Na.sub.3 PO.sub.4 and ethylenediamine are representative chemicals when square wave voltammetry (SWV) is used as the electroanalytical technique.

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The Woodlands, TX, United States of America

Roger D Moulton