Abstract: A method and composition for sealing of a conversion coating is disclosed. The method includes contacting a metal substrate, to which has been applied a conversion coating, with an aqueous solution including a heterocyclic alcohol. The preferred heterocyclic alcohol is tetrahydro-2-furanmethanol. The sealer may dry in place or be followed by a water rinse.

Abstract: A method is disclosed for reducing the oxygen content of water using a hydrazine-free dioxo aromatic compound or organically-substituted derivative thereof.

Abstract: A chromate and phosphate free composition and method for forming a dried in place conversion coating for aluminum and aluminum alloys. The method entails the application of the composition to aluminum or aluminum alloys and allowing the composition to dry in place. The composition is an acidic aqueous solution preferably containing more than 8 grams per liter dihydrohexafluozirconic acid, more than 10 grams per liter polyacrylic acid and more than 0.17 grams per liter hydrofluoric acid in a ratio of 1:0.84:0.014. Up to about 0.6 gram per liter dihydrohexafluotitanic acid is added to facilitate analytical testing in aqueous systems. The solution forms a dried in place conversion coating having a weight of from 6 to 25 milligrams per square foot in treatment (contact and drying) times as short as 2 seconds.

Abstract: A method for controlling fugitive dust emissions from bulk granular or powdered solids is disclosed. Fugitive dust emissions are controlled by applying an aqueous, foamed solution including a water-soluble cationic polymer to dust producing bulk, granular or powdered solids. The cationic polymer is incorporated into an aqueous foam comprising anionic, amphoteric or cationic foaming agents.

Abstract: A cleaning and etching solution and method for metal surface is disclosed which is an alkaline formulation which includes a surfactant combination of a low foaming ethylene oxide - propylene oxide block copolymer surfactant and a defoaming reverse ethylene oxide - propylene oxide block copolymer. The preferred cleaner includes an alkali metal hydroxide, an alkali metal salt of gluconic acid and preferably an alkali tripolyphosphate and the surfactant combination.

Abstract: Agglomerating agent and method for use in heap leaching of mineral bearing ores. A moderate to high molecular weight anionic polymer in combination with lime provides a highly effective agglomerating agent. The anionic polymer is preferably a copolymer of acrylamide and acrylic acid. The polymer preferably has a molecular weight of from about 1 to 8 million or higher.

Abstract: A corrosion inhibitor formulation for oil and water systems which formulation is resistant to sludge formation and does not tend to stabilize oil/water emulsions when added to oil and water systems. The corrosion inhibitor includes an imidazoline dissolved in an aromatic solvent, a 2-hydroxyalkylcarboxylic acid such as glycolic acid and a glycol such as hexylene glycol. The imidazoline is preferably prepared from a long chain fatty acid and a polyamine in a molar ratio of about 1.5:1.

Abstract: A process for stabilizing manganese ions in aqueous solutions is disclosed. The process comprises adding to an aqueous solution containing manganese ions a polymer or copolymer of unsaturated carboxylic compounds such as acrylic acid, methacrylic acid, polyacrylic acid and maleic anhydride and an orthophosphate. The ratio of polymer to orthophosphate is preferably about 2 to 1.

Abstract: A method and composition for dewatering coal and mineral slurries by centrifugation or filtration wherein a dewatering aid in combination with a clay dispersant is added to the slurry prior to centrifugation. The dewatering aid is preferably an alkylphenolethoxylate surfactant and the clay dispersant is preferably sodium hexametaphosphate. The combination aids in dewatering and also reduces the ash content of coal treated with the combination.

Abstract: Agglomerating agent and method for use in heap leaching of mineral bearing ores. A moderate to high molecular weight anionic polymer either alone or in combination with cement provides a highly effective agglomerating agent. The anionic polymer is preferably a copolymer of acrylamide and acrylic acid. The polymer preferably has a molecular weight of from about 1 to 8 million or higher.

Abstract: Agglomerating agent and method for use in heap leaching of mineral bearing ores. A moderate to high molecular weight anionic polymer either alone or in combination with cement provides a highly effective agglomerating agent. The anionic polymer is preferably a copolymer of acrylamide and acrylic acid. The polymer preferably has a molecular weight of from about 1 to 8 million or higher.

Abstract: A method of treating water to inhibit the formation of scale is disclosed. The method is particularly effective at inhibiting the formation and deposition of calcium and barium scales in circulating aqueous systems such as cooling water systems. The method comprises introducing into the aqueous system a polyepoxysuccinic acid of the general formula ##STR1## where n ranges from about 2 to about 11, M is hydrogen or a water soluble cation such as Na.sup.+, NH.sub.4.sup.+, or K.sup.+ and R is hydrogen, C.sub.1-4 alkyl or C.sub.1-4 substituted alkyl.

Abstract: A corrosion inhibitor formulation for oil and water systems which formulation is resistance to sludge formation and does not tend to stabilize oil/water emulsions when added to oil and water systems. The corrosion inhibitor include an imidazoline dissolved in an aromatic solvent, a 2-hydroxylakylcarboxylic acid such as glycolic acid and a glycol such as hexylene glycol. The imidazoline is preferably prepared from a long chain fatty acid and a polyamine in a molar ratio of about 1.5:1.

Abstract: Hydrocarbon soluble polyamidoamines prepared from tallowtriamine and/or tallowtetramine--(methyl)acrylate reactants are effective corrosion inhibitors for metal surfaces in contact with corrosive hydrocarbon mediums even under alkaline conditions.

Abstract: A surfactant stabilizer and method for aqueous boiler treatments is disclosed. The method includes using the combination of one or more lower alkyl or substituted amines or phosphoric acid with nonionic surfactant boiler water treatments. The addition of one or more lower alkyl or substituted amines or phosphoric acid stabilizes the nonionic surfactant boiler water treatments by increasing high temperature stability and/or high salt concentration tolerance.

Abstract: 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.

Abstract: A process for stabilizing manganese ions in aqueous solutions is disclosed. The process comprises adding to an aqueous solution containing maganese ions a polymer or copolymer of unsaturated carboxylic compounds such as acrylic acid, methacrylic acid, polyacrylic acid and maleic anhydride and an orthophosphate. The ratio of polymer to orthophosphate is preferrably about 2 to 1.

Abstract: 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.

Abstract: Methods for controlling the formation of proteinaceous fouling deposits in high temperature evaporators and concentrators as employed in processing steepwater in the wet milling of corn. The methods comprise adding a surfactant, preferably a nonionic surfactant to the steepwater. Particularly effective surfactants are oxyalkylated sorbitan R surfactants where R is monooleate, trioleate, monostearate, tristearate, monopalmitate and monolaurate.

Abstract: A chromate and phosphate free composition and method for forming a dried in place conversion coating for aluminum and aluminum alloys. The method entails the application of the composition to aluminum or aluminum alloys and allowing the composition to dry in place. The composition is an acidic aqueous solution preferably containing more than 8 grams per liter dihydro-hexafluozirconaic acid, more than 10 grams per liter polyacrylic acid and more than 0.17 grams per liter hydrofluoric acid in a ratio of 1:0.84:0.014. The solution forms a dried in place conversion coating having a weight of from 6 to 25 milligrams per square foot in treatment (contact and drying) times as short as 2 seconds.