Abstract: A non-petroleum based metal corrosion inhibitor, a process for preparing the inhibitor, a method of applying it to metal surfaces and advantages of the inhibitor and of surfaces which are coated with it are presented. The inhibitor is a solution of compounds mixed together in particular proportions to form a non-petroleum based coating for preventing, or inhibiting, the oxidation of metals. The solution is prepared from organic monobasic acids, a lubricant, a mixture of amines, and water. The solution is applied by spraying or rolling over the surface of steel or other metal. The coating inhibits oxidation of the metal surface and need not be removed from the surface prior to painting.

Abstract: A method of inhibiting corrosion in separation units of water-free petroleum and petrochemical hydrocarbon processing systems which comprises adding a compound corresponding to Formula I below either alone or in combination with a film-forming amine corrosion inhibitor to the hydrocarbon being processed:Formula IR--O--(CH.sub.2)nNH.sub.2,wherein n is 2 or 3 and R is a lower alkyl radical of not more than 4 carbon atoms.

Abstract: A pipe cleaning composition containing hydrochloric acid, at least one nitrogen-based inhibitor, a solubilizer for said inhibitor, a polysiloxane anti-foam agent and water, has a reduced tendency to attack copper or steel pipe.

Abstract: Sulfide-containing scale is removed from metal surfaces by contacting the encrusted surface with an aqueous acid cleaning solution having an aldehyde (e.g., formaldehyde) dissolved or dispersed in the acid in an amount sufficient to prevent the evolution of hydrogen sulfide gas.

Abstract: This invention relates to a corrosion inhibiting composition and to the process for inhibiting corrosion and the deposition of mineral scale on metal in aqueous systems. The process comprises adding to water a novel composition containing an azole, molybdates and effective amounts of at least one aminomethylene phosphonic acid and the derivatives thereof.

Abstract: Provided is a process for preparing an improved gum formulation useful for preventing oxidation in exposed and developed lithographic printing plates. The gum so produced exhibits reduced foaming and air entrapment properties.

Abstract: This invention relates to N-alkyl sulfone containing quaternary ammonium derivatives of 1,4-thiazines; to the preparation thereof; and to the uses thereof, for example as corrosion inhibitors, microbiocides, etc.

Abstract: This invention relates to a process of inhibiting corrosion which comprises adding an aqueous soluble form of a normally insoluble corrosion inhibitor to an aqueous system which converts the soluble corrosion inhibitor to an insoluble form which coats the metal with a corrosion inhibiting film.For example, a water insoluble heterocyclic amine used as a water soluble salt is dissolved in an aqueous system having a pH in excess of about 6 where the heterocyclic amine itself, i.e., in non-salt form, comes out of solution as a stable, fine dispersion which coats the metal with a uniform and tenacious corrosion inhibiting film.

Abstract: A process of converting 2,3,4,5-tetrahydropyrimidines (.DELTA.-1) having at least one hydrogen in the 2-position to 3,4,5,6-tetrahydropyrimidines (.DELTA.-2) which comprises hydrogenating and dehydrogenating said .DELTA.-1 tetrahydropyrimidines. Such hydrogenating and dehydrogenating may be done in either two sequential steps or in one step.Said .DELTA.-1 tetrahydropyrimidines can also be converted to .DELTA.-2 tetrahydropyrimidines by heating in the essential absence of a solvent, and preferably under basic conditions.In addition, corresponding hexahydropyrimidimidines can be converted to corresponding .DELTA.-2 tetrahydropyrimidines by dehydrogenation.This invention also relates to the use of .DELTA.-2 tetrahydropyrimidines, particularly as corrosion inhibitors.

Abstract: Quaternary polyvinyl heterocyclic compositions, as illustrated by polyvinyl pyridine and copolymers thereof, and their use as corrosion inhibitors which are particularly effective in acid systems.

Abstract: Certain sulfonium salts are herein described which are useful corrosion inhibitors in aqueous acidic cleaning solutions, even in the presence of ferric ions.

Abstract: 1,2-Ethane diphosphonates of the general formulaM.sub.2 O.sub.3 P--CH.sub.2 CH.sub.2 --PO.sub.3 M.sub.2wherein M is hydrogen, metal ion, ammonium, alkyl ammonium or mixtures thereof, are disclosed as inhibiting the corrosion of metals by oxygen-bearing waters. The 1,2-ethane diphosphonates can be employed either alone or in combination with certain thiols, 1,2,3-triazoles, zinc salts, chromates, silicates, inorganic phosphates, molybdates, tannins, lignins, lignin sulfonates, certain calcium and magnesium salts and mixtures thereof.

Abstract: Use of methoxypropylamine as a neutralizing amine in combination with hydrazine to prevent corrosion in steam condensate systems or in other low solids aqueous systems.

Abstract: The anti-rust properties exhibited by the aqueous fluids described herein are provided by one or more of the rust inhibitor additive composition prepared by reacting:(A) at least one aliphatic polycarboxylic acid acylating agent characterized by the presence within its structure of an aliphatic hydrocarbyl-substituent with(B) at least one hydroxy-substituted aliphatic amine, and(C) at least one basically reacting alkali metal compound.

Abstract: An electrical terminal corrosion preventative generally comprising a major proportion of a paste-like, heat resistant, lubricating grease having a dropping point of at least 250.degree. F. and a water soluble inorganic acid neutralizing agent. The electrical terminal corrosion preventative further includes water and an emulsifying agent capable when combined with the water and the neutralizing agent of facilitating substantially uniform dispersion of the combined water and neutralizing agent in the grease, the neutralizing agent being active to neutralize an acid when the neutralizing agent is dispersed in the grease. A method is also disclosed for using the corrosion preventative for preventing corrosion to electrical terminals and the like.

Abstract: This invention relates to N-alkyl thioethers of quaternary ammonium derivatives of 1,4-thiazines; to the preparation thereof; and to the uses thereof for example as corrosion inhibitors, microbiocides, etc.

Abstract: This invention relates to quaternaries of halogen derivatives of alkoxynoxymethyl amines and uses thereof. These may be summarized by the following formulae: ##STR1## where R and R' are substituted groups such as alkyl, aryl, etc.; R" is an alkylidene group; and X is halogen and A is an anion; and ##STR2## where R, R' and R" having the same meaning as in (1) and Z is a bridging group, preferably hydrocarbon such as alkylidene, alkinylene, alkenylene, arylene, etc.

Abstract: The invention provides novel mixtures of at least two aminoalkanols of the formula: ##STR1## wherein R.sub.1 and R.sub.2 each represent a C.sub.1-21 alkyl and the sum of the carbon atoms in R.sub.1 and R.sub.2 is 6 to 22; and the R.sub.1 --CH--CH--R.sub.2 units are mixtures containing 8 to 24 carbon atoms of at least two compounds. The vicinal OH and NH.sub.2 substituents are uniformly distributed statistically along the chain. The mixtures are readily prepared from mixtures of C.sub.8 -C.sub.24 olefins by epoxidation followed by reaction with ammonia.The mixtures are useful as intermediates in the production of hydroxyalkyl-aminobutyric acid mixtures for lubricating the cold working of aluminum and as corrosion inhibitors for corrodible iron-containing metals.

Abstract: This invention relates to substituted pyridines prepared by reacting aldehydes, amines, lower carboxylic acids such as acetic acid in the presence of oxygen. The N-substituted pyridinium salts formed can be converted to pyridines by thermal dealkylation.

Abstract: Polyglycolamines such as aminated polypropylene or polybutylene glycols and amine-initiated polypropylene and polybutylene glycols such as oxypropylated or oxybutylated lower alkanolamines inhibit the corrosion of ferrous metals by a nonoxidizing acid such as hydrochloric acid. Polyglycolamines of this class having an average molecular weight in the appropriate range of 300-5000 are effective inhibitors in 5-15 percent hydrochloric acid at moderately elevated temperatures.

Abstract: This invention relates to phosphating ferrous metal surfaces and more particularly, to new phosphating compositions characterized by the use of a cyclic trimetaphosphate as one of the phosphates comprising the phosphating composition. The cyclic trimetaphosphate permits lower operating temperature, increases the concentration tolerance of the phosphating solution to dissolved iron and provides an improved phosphate coating that is thinner, smoother and more corrosion resistant.

Abstract: Acylated hydroxyalkylaminoalkylamides, the N-alkylated derivatives thereof, and the preparation thereof and uses thereof as corrosion inhibitors.

Abstract: Esters of C.sub.10-25 aliphatic carboxylic acids (especially oleic acid) and C.sub.15-40 aliphatic alcohols (especially alcohol mixtures) are useful for protecting metal surfaces against corrosion, especially by acidic vapors. They may be applied in the form of a solution or dispersion in a substantially inert, normally liquid organic diluent such as Stoddard solvent.

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.

Abstract: Addition of small amounts of nitric acid to aqueous sulfuric acid containing more than about 60% by weight of H.sub.2 SO.sub.4 inhibits corrosive attack on carbon steel with which it may come in contact.

Abstract: Gray cast iron can be protected against corrosion by the vapors of boiling concentrated sulfuric acid when a compound containing positive nitrogen, e.g., nitrogen oxide, is introduced into the gas space between the cast iron to be protected and the boiling sulfuric acid.

Abstract: This invention is directed to a corrosion inhibiting composition and to a process for inhibiting corrosion and the deposition of mineral scale on metal in aqueous systems which comprises adding to the water effective amounts of citric acid and/or the alkali metal salts thereof or combinations of a metal molybdate with citric acid and/or an alkali metal salt thereof and at least one amino methylene phosphonic acid or a derivative thereof.

Abstract: Fluorine is substituted for other halogen atoms on the 1-carbon atom of a compound which contains a 1,1,1-trihalomethyl group (trichloromethyl) by contacting said compound or a precursor thereof with liquid HF in the presence of a mixture of antimony pentahalide with a least an approximately equimolar amount of antimony trihalide. The antimony halides may be added as the chlorides and in situ converted to fluorides and/or chlorofluorides, which are believed to be the essential agents. Additional starting material and antimony pentahalide may be added in the course of the reaction which proceeds stepwise. When the reactant is 1,1,1,3-tetrachloropropane the reaction can be continued to produce 3-chloro-1,1,1-trifluoropropane which, upon reaction with alkali, yields 3,3,3-trifluoropropene, of known utility in making fluorosilicones.

Abstract: The initial step for conventionally reprocessing spent nuclear fuel is to treat the nuclear fuel rods with concentrated nitric acid at elevated temperatures to dissolve out the contents of the fuel rods. The resultant solution contains ruthenium values present in an oxidation state of at least +4 and the presence of such ruthenium values causes intolerably high corrosion of stainless steel equipment which may come in contact with the hot concentrated nitric acid solution. The corrosion of stainless steel from such ruthenium-containing nitric acid solutions may be inhibited by treating the solutions with a reducing agent comprising nitrogen oxide. It is especially convenient to generate the reducing agent in situ by adding a sugar (e.g. sucrose) to the nitric acid solution so as to reduce substantially all of the dissolved ruthenium values having an oxidation state of at least +4 to an oxidation state of less than +4.

Abstract: Certain sulfonium salts are herein described which are useful corrosion inhibitors in aqueous acidic cleaning solutions, even in the presence of ferric ions.