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| Number | Title | Issue Date |
| 5785895 | Biodegradable corrosion inhibitors of low toxicity A method for inhibiting corrosion in an aqueous medium is disclosed. The method comprises incorporating into the medium an amount of a water-soluble corrosion inhibitor sufficient to inhibit corrosion. The corrosion inhibitor comprises an N-ethoxy, 2-subs... | 07/28/1998 |
| 5672183 | Anti-static additives for hydrocarbons A composition having increased electrical conductivity, comprising a liquid hydrocarbon and an anti-static amount of a hydrocarbon soluble copolymer of an alkylvinyl monomer and a cationic vinyl monomer. The copolymer has an alkylvinyl monomer unit to cat... | 09/30/1997 |
| 5637223 | Method of removing water soluble organics from oil process water Oil well production fluid composed of oil and water and containing in excess of 100 ppm water soluble petroleum carboxylates in anionic form dissolved in the water is treated by acidifying the fluid to a pH of 6.0 or lower with a combination of a strong o... | 06/10/1997 |
| 5634971 | Process for dispersing pigments with polyoxyalkylated ethers A process of dispersing a pigment consists of agitating a pigment in water with a polyoxyalkylated ether dispersant. The polyoxyalkylated ether comprises Units of the formulae A and B wherein Unit A is an alkyl group of the formula: ##STR1## and; Uni... | 06/03/1997 |
| 5582792 | Corrosion inhibition by ethoxylated fatty amine salts of maleated unsaturated acids A method for inhibiting corrosion of a metal surface bearing a corrosion product including ferrous ions is disclosed. The method comprises applying to the surface a salt of an ethoxylated amine and a reaction product of an alcohol and a fatty acid maleic ... | 12/10/1996 |
| 5567213 | Use of olefinic imines to scavenge sulfur species A method for scavenging sulfur species from a petroleum-derived medium is disclosed. The method comprises contacting the medium with sulfur species scavenging amount of an imine of the formula ##STR1## wherein x is an integer from 1 to 10, R' is an o... | 10/22/1996 |
| 5567212 | Use of olefinic imines to scavenge sulfur species A method for scavenging sulfur species from a petroleum-derived medium is disclosed. The method comprises contacting the medium with sulfur species scavenging amount of an imine of the formula ##STR1## wherein x is an integer from 1 to 10, R' is an o... | 10/22/1996 |
| 5538723 | Method for suppressing the viscosity of bioinsecticide slurries and related slurries A method for suppressing the viscosity of a calcium exotoxin slurry is disclosed. The method comprises adding to the slurry a viscosity-suppressing amount of a copolymer of a vinyl-based monomer and 2-acrylamide-2-methylpropane sulfonic acid or its sodium... | 07/23/1996 |
| 5504063 | Asphaltene removal composition and method An asphaltene removal composition comprising an alkyleneamine-fatty acid condensation reaction product and one or more polar aprotic high dielectric constant solvents is useful for removing and inhibiting asphaltene deposits from wells, pipelines and asso... | 04/02/1996 |
| 5480860 | Methods for reducing sulfides in sewage gas Methods are provided for selectively reducing the levels of hydrogen sulfide and organic sulfides in sewage gas to reduce or remove the odor, toxicity and corrosivity associated therewith, comprising contacting said sewage gas with a composition comprisin... | 01/02/1996 |
| 5456767 | Corrosion inhibition with bilayer-forming surfactants A method for inhibiting corrosion of a metal surface in a liquid medium is described. The method comprises incorporating into the medium a corrosion inhibiting amount of a combination of a surfactant that forms a bilayer on the metal surface in the fluid ... | 10/10/1995 |
| 5441998 | Repulpable hot melt adhesives A composition is provided which, when added to an elastomer or tackifier, renders a repulpable hot melt adhesive. The compositions consists of an alkoxylated alcohol of the formula A-B (I) wherein A is the... | 08/15/1995 |
| 5439592 | Method for removal of water soluble organics from oil process water A method for removal of water soluble organics from acidified oil process water is disclosed. The method comprises a step in which free oil is removed from such water by water-wet ultrafiltration to produce a water-rich filtrate stream which is then direc... | 08/08/1995 |
| 5440059 | Clay-catalyzed synthesis of aryl-substituted fatty acids and fatty esters and compositions related thereto A novel method for preparing an aryl-substituted fatty acid or fatty ester is disclosed. According to the method, an olefinic composition selected from among mono-unsaturated fatty acids, mono-unsaturated fatty esters and mixtures thereof is introduced to... | 08/08/1995 |
| 5436287 | Repulpable laminating adhesive containing an ethylene vinyl acetate copolymer having 40-60 weight percent of vinyl acetate units, an oxygen-containing comound, a tackifier and a wax The present invention relates to a repulpable laminating adhesive which contains an elastomer, tackifier and a 5:95 to 100:0 by weight blend comprising a high molecular weight oxygen-containing polymer and a wax. The oxygen-containing polymer is preferably of ... | 07/25/1995 |
| 5414039 | Repulpable hot melt adhesive for packaging materials containing an ethylene vinyl acetate copolymer having 40-60 weight percent of vinyl acetate units, a tackifier and a high molecular weight oxygen-containing polymer A composition is which, when added to an ethylene vinyl acetate copolymer having 40 to 60 weight percent of vinyl acetate units, renders a repulpable hot melt adhesive comprises a tackifier and an oxygen-containing polymer. The oxygen-containing polymer m... | 05/09/1995 |
| 5391601 | Repulpable laminating adhesive containing an elastomer, tackifier and a blend of an alkoxylated alcohol and a wax The present invention relates to a blend of a linear or branched chain saturated aliphatic hydrocarbon wax having a molecular weight of between about 300 to about 5,000 and an alkoxylated alcohol of the formula A--B, wherein A is the unit: CH3 ... | 02/21/1995 |
| 5385616 | Corrosion inhibition by formation of iron carboxylate A method for inhibiting corrosion of a metal surface bearing a corrosion product including ferrous ions is disclosed. The method comprises applying to the surface a reaction product of an alcohol and a fatty acid maleic anhydride adduct produced by a reac... | 01/31/1995 |
| 5380466 | Reaction product of nitrogen bases and phosphate esters as corrosion inhibitors A method for inhibiting corrosion of metal surfaces in an aqueous medium, comprising incorporating into the medium a corrosion inhibitor in an amount sufficient to inhibit corrosion, the corrosion inhibitor comprising a water-soluble agent selected from t... | 01/10/1995 |
| 5376170 | Additive dispersions containing ethoxylated alcohols An aqueous dispersion is provided which comprises water, a dispersant and a linear or branched chain saturated aliphatic hydrocarbon. The dispersant is of the general formula ##STR1## wherein R and R1 are independently selected from the gr... | 12/27/1994 |
| 5364532 | Method of removing water soluble organics from oil process water Oil well production fluid composed of oil and water and containing in excess of 100 ppm water soluble petroleum carboxylates in anionic form dissolved in the water is treated by acidifying the fluid to a pH of 6.0 or lower with a combination of a strong o... | 11/15/1994 |
| 5336441 | Corrosion inhibition in highly acidic environments by use of pyridine salts in combination with certain cationic surfactants A method for inhibiting corrosion of ferrous surfaces in an acidic, aqueous medium is disclosed. The method comprises incorporating into the medium a corrosion-inhibiting amount of a pyridine salt composition (comprising a quaternary pyridine salt composi... | 08/09/1994 |
| 5288789 | Foam control in fermentation broths with a condensate of alkylphenol and aldehyde that has been polyoxyalkylated A method is disclosed for controlling foam in a fermentation broth by adding to the fermentation broth an effective amount of a composition comprising a compound corresponding to the formula: ##STR1## wherein AO is an oxyalkylene copolymer moiety of ... | 02/22/1994 |
| 5284576 | Method of scavenging hydrogen sulfide from hydrocarbons Hydrocarbons, gas mixtures of hydrocarbons, and the like containing hydrogen sulfide are brought into intimate contact with a hydrogen sulfide scavenger prepared by reacting an alkylenepolyamine with formaldehyde, whereby the amount of hydrogen sulfide in... | 02/08/1994 |
| 5266185 | Method of suppression of hydrogen sulfide with heterocyclic-amine aldehyde reaction products Hydrogen sulfide evolution in a heavy hydrocarbon (such as a residual fuel oil) derived from a heavy crude oil (such as a API 8 gravity crude) is suppressed by contacting the hydrocarbon with a compound corresponding to the reaction product of a heterocyc... | 11/30/1993 |
| 5263539 | Scale inhibition during oil production A method and composition are provided for reducing occurrence of scale in a subterranean formation during an enhanced oil recovery process. A treatment composition comprising an amino phosphonic acid and a copolymer of an alkenyl sulfonate and an ethyleni... | 11/23/1993 |
| 5252289 | Water soluble 1,2-dithio-3-thiones Water-soluble 1,2-dithiole-3-thione derivatives are prepared by reacting a polyoxyalkylated starting material with sulfur. These derivatives are useful as corrosion inhibitors, particularly in aqueous environments.... | 10/12/1993 |
| 5223127 | Hydrogen sulfide scavengers in fuels, hydrocarbons and water using amidines and polyamidines A method for scavenging hydrogen sulfide in an aqueous and/or hydrocarbon medium is disclosed. According to the method, the medium is contacted with an effective amount of an amidine selected from the group consisting of monoamidines of from 1 to about 18... | 06/29/1993 |
| 5197627 | Double walled storage tank A double walled tank is provided for the storage of hazardous materials. The tank comprises an internal tank substantially contained inside an external tank, and substantially reduces the use of internal reinforcements between the two tanks that would dis... | 03/30/1993 |
| 5197545 | Volatile corrosion inhibitors for gas lift A method is disclosed for volatile inhibition and transport of inhibitor in the volatile phase to produced liquids of corrosion in a gas lift process in which a lift gas is pumped into a well to facilitate petroleum production of the well. The method comp... | 03/30/1993 |
| 5169411 | Suppression of the evolution of hydrogen sulfide gases from crude oil, petroleum residua and fuels Hydrogen sulfide gas evolution during storage or transport of petroleum residua is suppressed by the incorporation of an effective amount of certain imines.... | 12/08/1992 |
| 5169598 | Corrosion inhibition in highly acidic environments A method for inhibiting corrosion of ferrous surfaces in an acidic, aqueous medium having a temperature of at least about 200° F. is disclosed. The method comprises incorporating into the mediumn a corrosion inhibiting amount of a corrosion inhibitor com... | 12/08/1992 |
| 5160642 | Polyimide quaternary salts as clay stabilization agents A clayish formation, such as encountered in rock surrounding an oil well bore, is stabilized with a quaternary ammonium salt of an imide of polymaleic anhydride. The invention is particularly relevant to hydraulic fracturing fluids used for enhanced oil r... | 11/03/1992 |
| 5151195 | Flotation-aid composition and method of use thereof Copolymers of an acrylic compound and a polymerizable quaternary ammonium compound are useful as flotation-aids for removing oils and/or solid materials from aqueous systems. The polymerizable quaternary ammonium compounds are 1-alkoxy-2-hydroxy propyl qu... | 09/29/1992 |
| 5147134 | Process for the continuous production of high-internal-phase-ratio emulsions A process for producing high-internal-phase-ratio emulsions (HIPREs) on a continuous basis and an apparatus particularly suited for such process having structurizing elements, or mixing blades, adapted to provide complete mixing of the phases.... | 09/15/1992 |
| 5130473 | Dithiocarbamate compounds Reduction of asphaltene precipitation in asphaltenic subterranean reservoirs treated with aqueous solutions of strong acid is achieved by utilizing novel dithiocarbamate compositions to sequester iron.... | 07/14/1992 |
| 5112496 | Methods for inhibition of scale in high brine environments A method for inhibiting oilfield scale formation including calcite in a high brine environment comprises introducing an effective amount of a scale inhibiting composition to a high brine environment susceptible to calcite scale formation. The environment ... | 05/12/1992 |
| 5112505 | Certain dithiocarbamates and method of use for reducing asphaltene precipitation in asphaltenic reservoirs Reduction of asphaltene precipitation in asphaltenic subterranean reservoirs treated with aqueous solutions of strong acid is achieved by utilizing novel dithiocarbamate compositions to sequester iron.... | 05/12/1992 |
| 5110874 | Methods and compositions for reduction of drag in hydrocarbon fluids A method for reducing friction loss in flowing hydrocarbon fluids is disclosed. The method comprises adding to the fluid an effective amount of an oil-soluble polyamine and a terpolymer of styrene, alkyl acrylate and a carboxylic acid selected from the gr... | 05/05/1992 |
| 5102580 | Demulsifier compositions and demulsifying use thereof A blend of a first block oxyalkylated copolymer of a bishydroxyalkyl ether and a second block oxyalkylated copolymer of 2-amino-2-hydroxymethyl 1,3-propanediol partially cross-linked with a vinyl polymer in the pH reducing presence of an alkylsulfonic aci... | 04/07/1992 |
