Ashland, Inc.

Ashchem I.p., Inc.

Other

Drew Chemical Corporation

Ashland Licensing and Intellectual Property LLC

Dwight E Emerich

Pavol Kmec

Edward S Beardwood

Steven J Colby

Kaj D Rondum

Guy A Devicaris

George Freedman Hays

Kathleen A Fix

Charles O Weiss

Steven James Colby

Edward Samuel Beardwood

Novel methods for monitoring and recording fouling of aqueous systems are disclosed. The methods employ a heat transfer test assembly including an outer tube member, a heating rod positioned within the outer tube member, a ribbed tube sleeve fitted over the heating rod and thermocouples for sensing the wall temperature of heating rod. The heat transfer test assembly is connected to a monitoring and recording assembly that is connected to or includes a piping assembly. The piping assembly and the heat transfer test assembly are placed in fluid communication with a heat exchanger. Fouling determinations of fluid flowing through the piping assembly are made at varying flow rates with simultaneous monitoring and recording of the flow rates together with data, such as corrosion, pH, conductivity, and the like.

Methods for monitoring fouling of aqueous systems including enhanced heat exchanger tubes

This invention relates to a composition and a method for inhibiting the formation of scale, particularly complex scale, in an aqueous system where more than one type of scale is present. The scale typically present in the aqueous system includes silica, silicates, and carbonates. The scale inhibiting composition comprises (1) 2-phosphonobutane-1,2,4-tricarboxylic acid and salts thereof, and (2) a copolymer of (1) one or more allyloxybenzenesulfonate monomers, and (2) one or more water-soluble acrylic monomers, substituted acrylic monomers, or mixtures thereof.

Scale inhibitor for an aqueous system

This invention relates to phosphate stabilizing compositions comprising (a) polyaspartic acid, and (b) an anionic carboxylic polymer. The compositions effectively stabilize phosphates by inhibiting the formation of calcium phosphate scale. The invention also relates to a process for inhibiting calcium phosphate scale in water treatment systems.

Phosphate stabilizing compositions

This invention relates to corrosion inhibiting compositions for aqueous systems comprising (a) polyaspartic acid or salts therefore, and (b) a water soluble phosphonated oligomer. The compositions are effective corrosion inhibitors, but are also advantageous from an environmental standpoint because they are non-toxic, contain no heavy metals, and have little or no phosphorus. They also have significant calcium/hardness tolerance, are chlorine/bromine stable, and are effective corrosion inhibitors.

Scale corrosion inhibiting composition

This invention relates to an all-organic corrosion inhibiting composition comprising (a) 6,6,6-(1,3,5-triazine-2,4,6-triyltriimino) tris hexanoic acid; and (b) a water-soluble phosphonated oligomer salt. The invention also relates to a process for inhibiting corrosion in a closed recirculating cooling water system.

All-organic corrosion inhibitor composition and uses thereof

This invention relates to a scale inhibiting composition for aqueous systems comprising (a) polyaspartic acid, and (b) a water soluble phosphonated oligomer. The compositions are effective scale and/or corrosion inhibitors, but are also advantageous from an environmental standpoint because they are non-toxic, contain no heavy metals, and have little or no phosphorus. They also have sufficient calcium/hardness tolerance, are chlorine/bromine stable, and are effective corrosion inhibitors.

Scale and/or corrosion inhibiting composition

There is disclosed an improved corrosion inhibitor system including an oxazoline for an intermediate heat transfer medium for an indirect cooling heat transfer assembly and introduced in an amount of from 100 to 15,000 ppm to one part of the medium.

Improved corrosion inhibitor system for an intermediate heat transfer

A method for inhibiting fouling in an organic process stream which is substantially non-aqueous by the addition of certain oxime compounds.

Method for inhibiting foulant formation in a non-aqueous process stream

A method for inhibiting fouling in an organic process stream by adding certain oximes, hydrazine, erythorbic acid, carbohydrazide, or mixtures thereof. The antifoulant is added to the organic stream as an aqueous solution.

Method for inhibiting foulant formation in organic streams using

The removal of dissolved oxygen from aqueous systems, such as steam generating systems, thereby inhibiting the corrosion of metal surfaces by adding to the system a composition in which the effective component is an oxime of the formula: ##STR1## in which R.sub.1 and R.sub.2 are the same or different and are selected from hydrogen, lower alkyl groups of 1-8 carbon atoms and aryl groups.

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Lincoln Park, NJ, United States of America

Dwight E Emerich