Abstract: A method for reducing the toxicity of onium compounds, such as ammonium compounds and phosphonium compounds, by the use of certain additives is described. Suitable additives include, but are not necessarily limited to, carboxylic acids (e.g. naphthenic acids), sulfonic acids, organophosphonic acids, phenolic compounds, ether sulfates, phosphoric acid esters, sulfonated fatty acids, sulfated fatty acids, oligocarboxylic acids, and mixtures thereof, and alkali metal salts of these compounds and amine salts of these compounds.

Abstract: A method for reducing the toxicity of onium compounds, such as ammonium compounds and phosphonium compounds, by the addition of an anionic polymer is described. Suitable anionic polymers include, but are not necessarily limited to, polycarboxylic acids, polysulfonic acids, polyphosphoric acids, polyphosphonic acids, and mixtures thereof.

Abstract: A method for reducing the toxicity of onium compounds, such as ammonium compounds and phosphonium compounds, by the addition of an anionic polymer is described. Suitable anionic polymers include, but are not necessarily limited to, polycarboxylic acids, polysulfonic acids, polyphosphoric acids, polyphosphonic acids, and mixtures thereof.

Abstract: A method and a composition used therein are disclosed for inhibiting formation of hydrocarbon hydrates. The composition comprises an onium compound, an amine salt and, optionally, a solvent.

Abstract: A method for reducing the toxicity of onium compounds, such as ammonium compounds and phosphonium compounds, by the use of certain additives is described. Suitable additives include, but are not necessarily limited to, carboxylic acids (e.g. naphthenic acids), sulfonic acids, organophosphonic acids, phenolic compounds, ether sulfates, phosphoric acid esters, sulfonated fatty acids, sulfated fatty acids, oligocarboxylic acids, and mixtures thereof, and alkali metal salts of these compounds and amine salts of these compounds.

Abstract: A method and a composition used therein are disclosed for inhibiting formation of hydrocarbon hydrates. The composition comprises an onium compound, an amine salt and, optionally, a solvent.

Abstract: A method making sulfhydryl scavenging agents with reduced water content comprising treating the sulfhydryl scavenging agent to remove water. The sulfyhydryl scavenging agent preferably comprises an —N—C—N— moiety produced by condensation of an alkanolamine with an aldehyde. Preferred sulfhydryl scavenging agents are bisoxazolidines.

Abstract: The present invention provides a method for scavenging sulfhydryl compounds from sour hydrocarbon substrates, preferably crude oils, refined distillate streams, and natural gas, by mixing the substrates with preferably substantially water free bisoxazolidines.

Abstract: The present invention provides a method for scavenging H.sub.2 S from aqueous and hydrocarbon substrates, preferably natural gas, using aldehyde ammonia trimers.

Abstract: A mixture of amines made by reacting an amine compound with an aldehyde compound has been found to reduce the levels of H.sub.2 S in liquid or gaseous hydrocarbon streams. At least one of the compounds must have an alkoxyalkylene radical. In one embodiment of the invention, the mixture of amines contains at least one hexahydrotriazine compound of the formula: ##STR1## where R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are independently selected from the group consisting of hydrogen and an alkyl radical, including substituted alkyl radicals, of 1 to 5 carbon atoms; where at least one of the groups is an alkoxyalkylene group. In another embodiment of the invention, the amine mixture may contain other by products, such as the monomers which make up the hexahydrotriazine, with or without the hexahydrotriazine being present. These materials are selective to the reduction of H.sub.2 S levels in hydrocarbon or aqueous streams in the presence of CO.sub.2 which does not compromise their performance.

Abstract: A mixture of amines made by reacting an amine compound with an aldehyde compound has been found to reduce the levels of H.sub.2 S in liquid or gaseous hydrocarbon streams. At least one of the compounds must have an alkoxyalkylene radical. In one embodiment of the invention, the mixture of amines contains at least one hexahydrotriazine compound of the formula: ##STR1## where R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are independently selected from the group consisting of hydrogen and an alkyl radical, including substituted alkyl radicals, of 1 to 5 carbon atoms; where at least one of the groups is an alkoxyalkylene group. In another embodiment of the invention, the amine mixture may contain other by products, such as the monomers which make up the hexahydrotriazine, with or without the hexahydrotriazine being present. These materials are selective to the reduction of H.sub.2 S levels in hydrocarbon or aqueous streams in the presence of CO.sub.2 which does not compromise their performance.

Abstract: Dithiocarbamic salts made from the reaction products of certain polyamines and epoxides have been found to be useful to clarify water, particularly the oil-in-water emulsions which accompany crude oil production. The water clarification may be accomplished by demulsification or flocculation. The polyamine reaction products themselves are novel and may have the structure ##STR1## where R" is selected from the group consisting of the structure --R--NH.sub.2 and ##STR2## where R is selected from the group consisting of straight, branched or cyclic alkylene moieties; arylene moieties; substituted straight, branched or cyclic alkylene moieties; substituted arylene moieties or mixtures thereof; and where R' is--(CH.sub.2).sub.m --O--R--O--(CH.sub.2).sub.m --where n and m independently range from 1 to 5 and q is 0 or 1. The dithiocarbamic salts made from these polyamines also find use as corrosion inhibitors.

Abstract: A Mannich reaction of a polyfunctional amine followed by dithiocarbamate formation produces a composition useful as a water clarifier.

Abstract: The rheological characteristics of aqueous well drilling fluids are improved by incorporating into the fluids a small amount of a sulfonated styrene-itaconic acid copolymer.