Abstract: This invention relates to a process for inhibiting scale and fouling on metal surfaces exposed to an aqueous system, particularly a circulating aqueous system. The process comprises adding glutamic acid N,N diacetic acid, or salts thereof, to the aqueous system. Glutamic acid N,N diacetic acid, or salts thereof, act as a chelating agent and is biodegradable. The process is particularly useful for inhibiting the formation of scale and fouling on metal surfaces of steam generating and cooling systems.

Abstract: This invention relates to a corrosion inhibiting composition for use in commercial, institutional, and industrial water systems. The compositions comprise a mixture of (1) a fatty acid ester, and (2) a polyethylene glycol ester. These compositions are useful in inhibiting the corrosion of metals such as steel, copper, and brass, which are exposed to water.

Abstract: This invention relates to a process for inhibiting scale and fouling on metal surfaces exposed to an aqueous system, particularly a circulating aqueous system. The process comprises adding glutamic acid N,N diacetic acid, or salts thereof, to the aqueous system. Glutamic acid N,N diacetic acid, or salts thereof, act as a chelating agent and is biodegradable. The process is particularly useful for inhibiting the formation of scale and fouling on metal surfaces of steam generating and cooling systems.

Abstract: This invention relates to compositions, which are useful in removing dissolved oxygen from a fluid stream, preferably an aqueous stream. The compositions comprise blend of an oxime and a primary hydroxylamine. This invention also relates to a process for removing oxygen from an aqueous system, which comprises adding an oxime and a primary hydroxylamine to a fluid system.

Abstract: This invention relates to a corrosion inhibiting composition for use in commercial, institutional, and industrial water systems. The compositions comprise a mixture of (1) a fatty acid ester, and (2) a polyalkylene glycol, preferably polyethylene glycol. These compositions are useful in inhibiting the corrosion of metals such as steel, copper, and brass, which are exposed to water.

Abstract: This invention relates to a corrosion inhibiting composition for use in commercial, institutional, and industrial water systems. The compositions comprise a mixture of (1) a fatty acid ester, and (2) a polyethylene glycol ester. These compositions are useful in inhibiting the corrosion of metals such as steel, copper, and brass, which are exposed to water.

Abstract: This invention relates to compositions, which are useful in removing dissolved oxygen from a fluid stream, preferably an aqueous stream. The compositions comprise blend of an oxime and a primary hydroxylamine. This invention also relates to a process for removing oxygen from an aqueous system, which comprises adding an oxime and a primary hydroxylamine to a fluid system.

Abstract: This invention relates to a process for removing rust from metal surfaces. The process uses an aqueous solution of a benzoate.

Abstract: This invention relates to a galvanized metal, typically steel, corrosion inhibitor concentrate comprising (a) an amine salt of a fatty acid or an amine salt of a derivative of a fatty acid, (b) preferably a salt of a non polymeric aromatic acid, and (c) preferably a nonionic or anionic surfactant, and water. The invention also relates to a process for inhibiting corrosion and/or stripping of galvanized steel subjected to acidic conditions, e.g. an amine citrate or citric acid cleaning solution.

Abstract: This invention relates to a process for dispersing corrosion products, specifically iron oxide, in steam generating boilers. Improved dispersion is achieved by adding a dispersant to a feedpoint of the steam generating boiler where the composition comprises: (a) a copolymer of sulfonated styrene and maleic anhydride or maleic acid; and (b) diethylenetriamine penta (methylene phosphonic acid).

Abstract: The invention relates to a composition useful for cleaning metal surfaces immersed in an aqueous system. The composition comprises as a mixture: an organic carboxylic acid; a non chelating amine; a chelating agent; and preferably a sulfur-containing polymer.

Abstract: This invention relates to stable microemulsion cleaners having decreased volatile organic content comprising (a) a non polar, organic hydrocarbon solvent system comprising (i) an aromatic solvent and/or (ii) an aliphatic solvent, (b) an ethoxylate of an aromatic or aliphatic hydrophobe; (c) a glycol ether or ethylene glycol; a primary amino alcohol; water; and other components for specific applications. These cleaners can be used for removing oil, grease, and baked-on carbon deposits from metal surfaces, and are particularly useful as engine shampoos and cleaners for air coolers.

Abstract: A filter bed for removing impurities from a liquid stream is described. The filter bed comprises a mat of pliant fibers and relatively stiff fibers. The filter bed may additionally include adsorbent particles. The filter bed can provide desirable filtration efficiencies while exhibiting relatively low operating differentials. A method for separating impurities from a liquid which employs the filter bed is also described.

Abstract: A filter bed for removing impurities from a liquid stream is described. The filter bed comprises a mat of pliant fibers and relatively stiff fibers. The filter bed may additionally include adsorbent particles. The filter bed can provide desirable filtration efficiencies while exhibiting relatively low operating differentials. A method for separating impurities from a liquid which employs the filter bed is also described.

Abstract: A method and apparatus for removing ionic and suspended particulate impurities from a liquid by directing the liquid through a bed including a mixture of ion exchange fibers and inert fibers. The bed also may include a mixture of finely ion exchange particles. The bed may be a precoat layer that is applied on a filter support.

Abstract: Methods for treating aqueous solutions and for recovering specific chemical products from an aqueous solution by ion exchange or adsorption by passing the aqueous solution through a regenerable filter bed comprising a flocculated mixture of finely divided active particulate material and filter aid materials having a depth of from about 3.0 inches to about 60 inches.

Abstract: A water disintegratable package which includes a solid water soluble salt of hydrazine whereby the package can be added to water to effect disintegration of the package to release the hydrazine salt for solubilization in the water to thereby provide for corrosion protection in aqueous systems.

Abstract: A method of reducing the amount of sulfur trioxide condensation on, and therefore the amount of sulfuric acid corrosion of, metal parts at the cold-end of a combustion system and in contact with combustion gases derived from the combustion of sulfur containing fuel, said method comprising adding to the combustion gases an effective amount for the purpose of an aliphatic, water-soluble alkanolamine additive.

Abstract: A method of reducing the amount of sulfur trioxide condensation on, and therefore the amount of sulfuric acid corrosion of, metal parts at the cold-end of a combustion system in contact with combustion gases derived from the combustion of sulfur-containing fuel, said method comprising adding to the combustion gases an effective amount for the purpose of an aqueous solution of sodium metasilicate and an alkanolamine, particularly N-aminoethyl ethanolamine.

Abstract: A method of reducing the amount of sulfur trioxide condensation on, and therefore the amount of sulfuric acid corrosion of, metal parts at the cold-end of a combustion system in contact with combustion gases derived from the combustion of sulfur-containing fuel, said method comprising adding to the combustion gases an effective amount for the purpose of an aqueous solution of sodium aluminate and an alkanolamine, particularly N-aminoethyl ethanolamine.