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| Number | Title | Issue Date |
| 7311877 | Inhibition of corrosion in fluid systems The present invention provides an effective method of inhibiting corrosion on metallic surfaces in contact with a fluid contained in an industrial system, which includes adding to such fluid an effective corrosion controlling amount of a phosphoglyceride compound, o... | 12/25/2007 |
| 7223299 | Composition and process for improving the adhesion of a siccative organic coating compositions to metal substrates A composition is described which is useful in improving the adhesion of siccative organic coatings to metal surfaces. The composition generally comprises a liquid carrier, a borate composition which is the reaction product of at least one amino alcohol with boric ac... | 05/29/2007 |
| 7208648 | Minimizing corrosion in a methanol-to-olefin effluent processing system The present invention is directed toward reducing corrosion in a methanol-to-olefin (MTO) effluent processing system, and particularly in the condensate removal system thereof, by injecting a neutralization agent into one or more target regions of the MTO effluent p... | 04/24/2007 |
| 7163056 | Esterquat acidic subterranean treatment fluids and methods of using esterquats acidic subterranean treatment fluids The present invention relates to acidic treatment fluids that comprise an acid fluid and an ester-containing quaternary ammonium compound (“esterquat”) and methods of their use. One embodiment of the present invention provides a method of inhibiting metal corros... | 01/16/2007 |
| 7141174 | Modified amine for boiler water treatment The present invention provides a method of treating boiler and condensate water by the addition of an effective amount of a hydroxyamine-acid ester treatment reagent or an all-in-one treatment composition comprising a hydroxyamine-acid ester. Modification of a hydro... | 11/28/2006 |
| 7135604 | Process for separating carbon dioxide from an oxygenate-to-olefin effluent stream The present invention is a process for removal of carbon dioxide from a reactor effluent stream comprising water, carbon dioxide and olefin(s), where a portion of the carbon dioxide is removed in a quenching step with a quench medium and more carbon dioxide is remov... | 11/14/2006 |
| 7102049 | Process for operating a quench device in an oxygenate-to-olefin production unit The present invention is a process for producing olefin(s) from oxygenates that is more effective than previously known processes at removing carbon dioxide from the effluent stream by operating a quench tower at a pH greater than 7.0. ... | 09/05/2006 |
| 7073588 | Esterquat acidic subterranean treatment fluids and methods of using esterquats acidic subterranean treatment fluids The present invention relates to acidic treatment fluids that comprise an acid fluid and an ester-containing quaternary ammonium compound (“esterquat”) and methods of their use. One embodiment of the present invention provides a method of inhibiting metal corros... | 07/11/2006 |
| 7044985 | Process for pre-treating cellulosic fibers and cellulosic fiber blends A process and formulation for pre-treating a cellulosic, or cellulosic blend with synthetic fiber, substrate, achieving sufficient clearness and appropriate absorbency prior to dyeing the substrate. The process having the steps of: providing a vessel; providing a ce... | 05/16/2006 |
| 7005555 | Process for separating and recycling oxygenate(s) to an oxygenate-to-olefin reactor The present invention is a process for producing olefin(s) from oxygenate(s). The process removes oxygenate(s) including carbon dioxide in the bottoms of the quench stream and recycles the oxygenate(s) back to the reactor. Carbon dioxide is removed from the quench b... | 02/28/2006 |
| 6800594 | Corrosion inhibitor barrier for ferrous and non-ferrous metals An environmentally friendly corrosion inhibiting formulation for the oil-water interface of pipe lines and oil well drilling systems which is prepared pursuant to a process including the steps of reacting an acid selected from the group consisting of a fatty acid an... | 10/05/2004 |
| 6797197 | Modified amine for boiler water treatment The present invention provides a method of treating boiler and condensate water by the addition of an effective amount of a hydroxyamine-acid ester treatment reagent or an all-in-one treatment composition comprising a hydroxyamine-acid ester. Modification of a hydro... | 09/28/2004 |
| 6706214 | Composition and process for inhibiting corrosion of metallic substrates A composition and process for inhibiting the corrosion of metallic substrates is revealed. The process utilizes an aqueous treatment solution comprising chitosan which has been reacted with an additive selected from the group consisting of phosphorus-containing comp... | 03/16/2004 |
| 6699822 | Sulfated dicarboxylic acids for lubrication, emulsification, and corrosion inhibition Sulfated dicarboxylic acids, amine salts thereof, or inorganic salts thereof may be used in various applications, including use as corrosion-inhibiting additives (e.g., in oil-field drilling applications and in metalworking applications), as emulsifiers (... | 03/02/2004 |
| 6645399 | Mercaptoalcohol corrosion inhibitors Compositions and methods have been discovered for inhibiting corrosion of metals, particularly iron alloys, in contact with fluids, either hydrocarbons, alcohols, or aqueous fluids, employing mercaptoalcohols. The mercaptoalcohols should have at least one... | 11/11/2003 |
| 6620338 | Composition for inhibition of metal corrosion Novel corrosion inhibiting compositions comprising a combination of amino thiol or amino disulfide compounds with acidic amino acid polymers inhibit carbon dioxide induced corrosion of ferrous metals in aqueous systems. Particularly effective inhibitor co... | 09/16/2003 |
| 6592781 | Thiazolidines and use thereof for corrosion inhibition A novel composition of thiazolidines of the following formula and a method to prepare the same are disclosed. The method involves reacting a dihydrothiazole with a mixture comprising formic acid and an aldehyde. These new thiazolidines are useful as corro... | 07/15/2003 |
| 6562149 | Solution and process to pretreat copper surfaces The invention concerns processes and solutions for the preliminary treatment of copper surfaces which are subsequently to be firmly bonded to organic substrates. The solution is used, in particular, for firmly bonding laminated multilayered printed circui... | 05/13/2003 |
| 6548016 | Oil soluble hydrogen permeation inhibitor The present invention provides a composition and method for inhibiting hydrogen permeation in metal refinery equipment comprising incorporating into a product stream handled by said equipment a polyamine amide of 3-hydrocarbyl thiopropionic acid in an amo... | 04/15/2003 |
| 6540943 | Method of inhibiting corrosion of metal equipment which is cleaned with an inorganic acid The corrosion of metal equipment which is cleaned with an inorganic acid is inhibited by treating the equipment with a corrosion inhibitor composition containing at least one quaternary ammonium compound, a sulfur-containing compound and a nonionic surfac... | 04/01/2003 |
| 6540959 | Vapor-phase corrosion inhibitors and methods for their production The invention concerns combinations of substances with (1) an aromatic mercaptothiazole or triazole, (2) a multiple substituted phenol insoluble in water, (3) L ascorbic acid or one of its salts and possibly (4) a suitable carboxylic acid/salt pair that a... | 04/01/2003 |
| 6534659 | Sufidomaidocarboxylic acids, method for production thereof, and use therefor Novel sulfidoamidocarboxylic acids (salts), a method for the production thereof, and uses therefor are provided. Sulfidoamidocarboxylic acids (salt) with a thiazolidine residue such as dimethylthiazolidine or methylthiazolidine or thiazolidine residue (re... | 03/18/2003 |
| 6521028 | Low hazard corrosion inhibitors and cleaning solutions using quaternary ammonium salts The present invention is directed to methods for preparing quaternary ammonium salts, particularly pyridinium and quinolinium salts. By preparing these salts in a solvent selected from the group consisting of propylene glycols, propylene glycol ethers and... | 02/18/2003 |
| 6517617 | Method and apparatus to clean and apply foamed corrosion inhibitor to ferrous surfaces The present invention relates to the application of a coating to a pipeline, FPS (Fire Protection System) or to pipe stock from which a pipeline is fabricated. A composition which when applied to the inside surface of the pipe prevents either chemical cor... | 02/11/2003 |
| 6508958 | Composition and process for inhibiting corrosion of metallic substrates A composition and process for inhibiting the corrosion of metallic substrates is revealed. The process utilizes an aqueous treatment solution comprising chitosan which has been reacted with an acid selected from the group consisting of phosphonic acids, c... | 01/21/2003 |
| 6419857 | Thiazolidines and use thereof for corrosion inhibition A novel composition of thiazolidines of the following formula and a method to prepare the same are disclosed. The method involves reacting a dihydrothiazole with a mixture comprising formic acid and an aldehyde. These new thiazolidines are useful as corro... | 07/16/2002 |
| 6365067 | Mercaptoalcohol corrosion inhibitors Compositions and methods have been discovered for inhibiting corrosion of metals, particularly iron alloys, in contact with fluids, either hydrocarbons, alcohols, or aqueous fluids, employing mercaptoalcohols. The mercaptoalcohols should have at least one... | 04/02/2002 |
| 6362137 | Process for preparing a corrosion inhibitor/metal passivator additive for lubricant, grease and fuel applications from waste refinery streams This invention relates to a cost effective process for preparing a corrosion inhibitor/metal passivator additive for lubricant, grease and fuel applications from waste refinery streams, comprising reacting 2,5-dimercapto-1,3,4-thiadiazole either in powder... | 03/26/2002 |
| 6261346 | Method for protecting metal surfaces against corrosion in liquid or gaseous media A process useful for protecting metal surfaces against corrosion in is presented involving: (a) forming a corrosion inhibitor having a compound corresponding to formula (I): ##STR1## where R1, R2 and R3 independently of on... | 07/17/2001 |
| 6248701 | Aqueous metal coating composition and process with reduced staining and corrosion A combination of sulfur-free azoles, preferably benzotriazole and tolyltriazole, with sulfur-containing azoles, preferably 2-mercaptobenzothiazole or mercaptobenzimidazole, prevents discoloration, staining, or corrosion of metal surfaces being coated with... | 06/19/2001 |
| 6187227 | Thiacrown ether compound corrosion inhibitors for alkanolamine units The corrosion of metals in contact with aqueous alkanolamine solution in acid gas removal units is inhibited by adding to the alkanolamine solution a corrosion inhibiting amount of a thiacrown ether compound. The compounds are monomeric or polymeric and h... | 02/13/2001 |
| 6120705 | Corrosion protection of metals using diphenylamine compound(s) A metal article is protected from corrosion under prolonged exposure to normal ambient atmospheric conditions which cause such corrosion by coating the metal article, optionally in the presence of an adherent organic resinous coating, which comprises trea... | 09/19/2000 |
| 6063334 | Sulfur based corrosion inhibitor The present disclosure is concerned with inhibiting corrosion in metal, usually steel, equipment which is exposed to oil field production flow including gases, oil, water, and sand. It is injected into the aqueous stream and carried with it to contact and... | 05/16/2000 |
| 6013200 | Low toxicity corrosion inhibitor A water soluble corrosion inhibitor containing a compound having at least one five-membered heterocyclic ring having at least one thione group and at least one other pendant group is described. Such a corrosion inhibiting compound can be made by reacting ... | 01/11/2000 |
| 5976415 | Corrosion-inhibiting polysulfide sealants Polysulfide corrosion inhibiting compositions used as adhesives and sealants for aircraft and military shelter industries are described as two-part compositions including a curing agent in the second part and a particular corrosion-inhibiting composition ... | 11/02/1999 |
| 5976416 | Corrosion inhibited organic acid compositions and methods The present invention provides corrosion inhibited organic acid compositions and methods of using the compositions. The compositions basically comprise water, an organic acid, a corrosion inhibitor comprising at least one quaternary ammonium compound and ... | 11/02/1999 |
| 5916484 | Metal corrosion inhibited organic acid compositions By the present invention, improved metal corrosion inhibited aqueous organic acid compositions and methods are provided. The compositions are basically comprised of water, an organic acid, a corrosion inhibitor comprising at least one rosin amine derivati... | 06/29/1999 |
| 5911916 | Corrosion inhibitor for alkanolamine units The corrosion of metals in contact with aqueous alkanolamine solution in acid gas removal units is inhibited by maintaining in the alkanolamine solution a corrosion inhibiting amount of a thiodialkanol. The thiodialkanol is useful for inhibiting the corro... | 06/15/1999 |
| 5885487 | Corrosion inhibitor for alkanolamine units The corrosion of metals in contact with aqueous alkanolamine solution in acid gas removal units is inhibited by maintaining in the alkanolamine solution a corrosion inhibiting amount of a compound having the formula: ##STR1## where R is S or O, and R... | 03/23/1999 |
| 5871691 | Inhibition of corrosion in aqueous systems A method and compounds for inhibiting and controlling corrosion is disclosed. The method is particularly effective at inhibiting or preventing corrosion of ferrous-based metals in contact with aqueous systems such as cooling water systems. The method comp... | 02/16/1999 |
