Calgon Corporation

Paul H Ralston

Bennett P Boffardi

Sandra L Whitney

Michael M Cook

Jerry L Walker

Phillip B Reilly, Jr

The instant invention is directed to a process for inhibiting the precipitation of dissolved manganese ion and its reaction products in aqueous solutions, comprising adding to the aqueous solution 0.1 to 20 ppm of a copolymer of an unsaturated carboxylic acid or salt selected from the group consisting of acrylic acid and methacrylic acid and an unsaturated sulphonic acid or salt selected from the group consisting of 2-acrylamido-2-methylpropylsulphonic acid and 2-methacrylamido-2-methylpropylsulphonic acid.

Stabilization of soluble manganese and its reaction products

The instant invention is directed to a method for preventing the formation of scale in sugar evaporation equipment comprising adding to the juice from 0.1 to 200 ppm of a polycarboxylic acid or its salt selected from the group consisting of polymaleic acid, amine adducts of maleic anhydride polymers, phosphonobutane tri-carboxylic acid, phosphinocarboxylic acids and copolymers of acrylic acid and an hydroxylated lower alkyl acrylate.

Control of scale in sugar evaporation equipment

The instant invention is directed to a process for the inhibition of scale and corrosion formation in an aqueous system, comprising adding to the system about 0.1 to 100 ppm, by weight based on the total aqueous content of said system, of 103 to 115% polyphosphoric acid, or neutral salts thereof.

Polyphosphoric acid as a scale and corrosion inhibitor

Process for the manufacture of fused polyphosphate glasses in which a hydrocarbon is used as the carrier for the slurry of reactants that are fed to the high temperature furnace.

Process for the manufacture of fused polyphosphate glasses

A method of inhibiting corrosion and scale formation in an aqueous system is disclosed which comprises the step of treating the said system with 0.1 to 500 parts per million by weight of the total aqueous content of the said system, of a composition which comprises amine adducts of maleic anhydride polymers and which may additionally include zinc.

Corrosion inhibition with amine adducts of maleic anhydride polymers

Use of phosphorous acid (H.sub.3 PO.sub.3) and zinc to inhibit the corrosion of metals by oxygen-bearing waters.

Phosphorous acid and zinc corrosion inhibiting compositions and methods

A method of inhibiting corrosion and scale formation in an aqueous system is disclosed which comprises the step of treating the said system with 0.1 to 500 parts per million by weight of the total aqueous content of the said system, of a composition which may additionally include zinc and which comprises a polymer selected from the group consisting of:

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Bethel Park, PA, United States of America

Paul H Ralston