Abstract: Compositions and methods for chemically scavenging oxygen from an aqueous medium are disclosed. Furfural catalyzed by hydroquinone can be used as an oxygen scavenger in any aqueous medium, but is especially well adapted for use in boiler water systems.

Abstract: The method for improving the initial activity of activated hydrazine is used as corrosion protection for reservoir drinking water and for the wet preservation of installation parts no longer in use. It is the object of the invention to increase the initial activity of hydrazine solutions, activated with complexes of trivalent cobalt, with respect to oxygen dissolved in water, and to develop a suitable method for the activator-rich hydrazine solution. The object is accomplished in that trivalent phenols, preferably pyrogallol, are added in small amounts to the activator-rich hydrazine solution.

Abstract: A method is provided for reducing the corrosiveness of an aqueous fluid, particularly water containing dissolved oxygen and corrosive chemical agents such as naturally-occurring brine. According to the method, an enzyme which reacts with a substrate and consumes oxygen is added to the water along with a suitable substrate. Crude oil or other hydrocarbon material is also added to the water. The resulting water is less corrosive than water not containing the described system. In another embodiment of the invention, a water-flood method of post-primary oil recovery is provided in which the brine used is made less corrosive to metal drilling equipment by the addition to the water of an oxygen-consuming enzyme, a suitable substrate for the enzyme, and crude oil or other hydrocarbon material.

Abstract: There are employed water soluble low molecular weight polycondensation products produced by the condensation of acrolein and formaldehyde in a molar ratio between 1:1 and 1:10 in aqueous or aqueous-organic medium in the presence of a basic catalyst for the elimination of hydrogen sulfide and iron sulfide present in aqueous systems. The condensation reaction can also be carried out in the additional presence of water soluble monohydric or polyhydric alcohols and/or acid amides.

Abstract: An improved oxygen scavenger for aqueous mediums is disclosed which comprises hydrazine-free solution of hydroquinone and mu-amine.

Abstract: Antifreeze compositions and a process for inhibiting the corrosion of aluminum in contact with aqueous liquids are disclosed. The antifreeze compositions comprise a combination of an alkanolamine, an alkali metal phosphate, a heterocyclic nitrogen compound, as defined, and a conventional corrosion inhibitor in effective corrosion inhibiting amounts. The aqueous liquid can be an alcohol such as ethylene glycol.

Abstract: Corrosion inhibited alcohol compositions can be prepared which are suitable for use as anti-freeze compositions in the cooling systems of internal combustion engines. The alcohol is selected from at least one of the group consisting of methanol, ethanol, propanol, ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol and glycerol. The corrosion inhibitor comprises an effective amount of a conventional corrosion inhibitor selected from the group consisting of the alkali metal carbonates, borax, the alkali metal dichromates, the alkali metal silicates, phosphorous acid, phosphoric acid, an alkali metal tungstate, benzotriazole, tolyltriazole, an alkali metal salt of benzoic or toluic acid, an alkali metal salt of a phenol, an alkanolamine and an organo-silicone compound in addition to an alkanolamine phosphate and a heterocyclic nitrogen-containing compound. The phosphate is the reaction product of an alkanolamine and phosphoric acid.

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: Process for inhibiting the corrosion of equipment made of titanium or of alloys containing titanium by a solution containing a peroxy compound. To effect the inhibition, a solution containing calcium, strontium or barium ions is used.

Abstract: Novel arylalkyl silicone sulfonate-silicate copolymers are disclosed which are useful in inhibiting the corrosion of metals below sodium in the electromotive series that come in contact with aqueous liquids, especially aqueous alcohol solutions used as heat transfer media. Antifreeze concentrates and a process for inhibiting corrosion are also disclosed.

Abstract: Hydroxy-substituted aliphatic silicone sulfonate-silicate copolymers are useful metal corrosion inhibitors for metals that come in contact with aqueous liquids. Antifreeze concentrates and a process for inhibiting the corrosion of metals below sodium in the electromotive series which come in contact with aqueous liquids are disclosed.

Abstract: Salts of substituted nitrogen or sulfur containing siliconates are effective stabilizers for aqueous silicates in such applications as treating boiler water, geothermal water and other aqueous silicates. They are also useful in antifreeze and coolant solutions.

Abstract: Aqueous glycol compositions containing conventional corrosion inhibitors are improved by the addition of a .beta.-dicarbonyl compounds having the formulaR.sub.1 -C(O)-C(R.sub.2)(R.sub.3)-C(O)-R.sup.4whereR.sub.1 and R.sub.4 are independently alkyl groups of 1-4 carbons, and alkoxy groups, of 1-4 carbons,R.sub.2 and R.sub.3 are hydrogen, hydroxyl, alkyl groups of 1-4 carbons, or acetyl groups, with the proviso that R.sub.1 and R.sub.2 can be joined to form a 5 or 6 membered ring when R.sub.3 is hydrogen and R.sub.4 is an alkyl group of 1-4 carbons,with the proviso that R.sub.1 and R.sub.4 can be joined to form a 5 membered ring when R.sub.2 is hydrogen and R.sub.3 is an alkyl group of 1-4 carbons, with the proviso that R.sub.1 and R.sub.4 can be joined to form the 1,2-phenylene group when R.sub.2 and R.sub.3 are hydrogen, andwith the proviso that R.sub.1 and R.sub.4 can be joined to form the 1,2 phenylene group when R.sub.2 is hydroxyl and R.sub.3 is the 2-hydroxy 1,3-dione-indanyl-2 group.

Abstract: A composition is disclosed comprising a stable aqueous solution of (i) water-soluble zinc compound, (ii) water-soluble chromate compound and (iii) a particular type of water-soluble polymer composed essentially of moieties derived from acrylic acid and hydroxylated lower alkyl acrylates. The composition could additionally comprise (iiii) orthophosphate.

Abstract: A method for reducing the oxidation of sulfite to sulfate in a sulfite-containing aqueous medium is disclosed and comprises adding to the medium water-soluble polyethyleneamine having at least one secondary amine and two primary amines.

Abstract: A method is disclosed for reducing the oxygen content of water using a hydrazine-free aqueous solution of hydroquinone.

Abstract: An improved oxygen scavenger for aqueous mediums is disclosed which comprises hydrazine-free solution of hydroquinone and mu-amine.

Abstract: A method for boiler water treatment to retard corrosion due to dissolved oxygen. Hydroquinone and certain related compounds are highly effective oxygen scavengers for use in boiler water and thereby effect reduction of corrosion resulting from dissolved oxygen.

Abstract: This invention relates to single-phase antifreeze or coolant concentrates comprising an alcohol, a corrosion inhibiting amount of a water-soluble organosiloxane-silicate copolymer corrosion inhibitor and an organic basic pH buffer capable of buffering pH in the range of about 9 to about 11 comprising a hydroxybenzoic acid or mixtures thereof. The concentrates are used as coolants either undiluted or upon dilution with about 25 percent to about 90 percent by weight of water based upon the total weight of the concentrate. The alcohol is preferably ethylene glycol. The coolant compositions are effective in providing protection against corrosion of all metals and alloys used in industrial heat exchangers are especially effective in inhibiting the corrosion of aluminum internal combustion engine and radiator components.

Abstract: Benzazoles of the general formula ##STR1## and derivatives thereof; where X=O, S, NH and n is a number, for example 3-12 or greater, such as 3-5 or greater, and R is a substituted group, for example, a hydrocarbon or substituted hydrocarbon group, such as alkyl, etc. and n' is a number 0-3 or greater; and to use for such benzazoles as corrosion inhibitors.

Abstract: This invention relates to single-phase antifreeze or coolant concentrates comprising an alcohol, a silicone-silicate copolymer and an organic basic pH buffer and corrosion inhibitor comprising a hydroxybenzoic acid or mixtures thereof. The concentrates are preferably used as coolants either undiluted or upon dilution with about 30 to about 90 percent by weight of water based upon the total weight of the coolant. The alcohol is preferably ethylene glycol. The coolant compositions are especially effective in inhibiting the corrosion of aluminum internal combustion engine and radiator components.

Abstract: This invention relates to single-phase antifreeze or coolant concentrates comprising an alcohol, an aminosilicone-silicate copolymer and an organic basic buffer and corrosion inhibitor comprising a hydroxybenzoic acid or mixtures thereof. The concentrates are preferably used as coolants either undiluted or upon dilution with about 25 to about 90 percent by weight of water based upon the total weight of the concentrate. The alcohol is preferably ethylene glycol. The coolant compositions are effective in providing protection against corrosion of all metals and alloys used in industrial heat exchangers and are especially effective in inhibiting the corrosion of aluminum internal combustion engine and radiator components.

Abstract: This invention relates to single-phase antifreeze or coolant concentrates comprising a major proportion of at least one alcohol, at least one water-soluble silicate, and an organic basic pH buffer and corrosion inhibitor comprising at least one hydroxybenzoic acid. The concentrates can be used without dilution but are preferably used, upon dilution with water. The concentrates are generally diluted for use in with about 25 to about 90 percent by weight of water based upon the total weight of the concentrate. The alcohol is preferably ethylene glycol. The alcohol-based antifreeze and coolant compositions of the invention are effective in the protection against corrosion of all metals and alloys used in industrial processes and are especially effective when used to inhibit the corrosion of aluminum internal combustion engine and radiator components.

Abstract: This invention relates to single-phase antifreeze or coolant concentrates comprising an alcohol, a corrosion inhibiting amount of a water-soluble organosiloxane-silicate copolymer corrosion inhibitor and an organic basic pH buffer capable of buffering pH in the range of about 9 to about 11 comprising a hydroxybenzoic acid or mixtures thereof. The concentrates are used as coolants either undiluted or upon dilution with about 25 percent to about 90 percent by weight of water based upon the total weight of the concentrate. The alcohol is preferably ethylene glycol. The coolant compositions are effective in providing protection against corrosion of all metals and alloys used in industrial heat exchangers are especially effective in inhibiting the corrosion of aluminum internal combustion engine and radiator components.

Abstract: This invention relates to single-phase antifreeze and coolant concentrates comprising an alcohol, a metal salt of a carboxysiloxane and an organic basic PH buffer and corrosion inhibitor comprising a hydroxybenzoic acid or mixtures thereof. The concentrates are preferably used as coolants either undiluted or upon dilution with about 25 to about 90 percent by weight of water based upon the total weight of the concentrate. The alcohol is preferably ethylene glycol. The coolant compositions are effective in providing protection against corrosion of all metals and alloys used in industrial heat exchangers and are especially effective in inhibiting the corrosion of aluminum internal combustion engine and radiator components.

Abstract: This invention relates to single-phase antifreeze or coolant concentrates comprising (1) an alcohol, (2) at least one of an amino siloxane, an amino silane or both an amino siloxane and an amino silane and a siloxane of the formula: ##EQU1## wherein R.sup.6 is a monovalent hydrocarbon group and e has a value of from 1 to 3, and (3) a hydroxybenzoic acid basic pH buffer preferably comprising para or ortho hydroxybenzoic acid or mixtures thereof. The concentrates are preferably used, upon dilution with about 30 to about 90 percent by weight of water based upon the weight of said concentrate, as antifreeze compositions for internal combustion engines. The alcohol is preferably ethylene glycol. The coolant compositions are effective in providing protection against corrosion of all metals and alloys used in industrial heat exchangers and are especially effective in inhibiting the corrosion of aluminum internal combustion engine and radiator components.

Abstract: Corrosion of metal surfaces contacted by aqueous agricultural compositions containing as an active ingredient an aminomethylenephosphonic acid, such as N-phosphonomethylglycine or an agriculturally acceptable salt or ester thereof is inhibited by the inclusion in the compositions of an inhibiting amount of a thiol compound or salt thereof.