Amine, Amide, Azo, Or Nitrogen-base Radical Containing Patents (Class 252/390)
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Patent number: 6623655Abstract: A metal chelating composition having the formula: wherein Q is a carrier; S1 is a spacer; L is —A—T—CH(X)— or —C(═O)—; A is an ether, thioether, selenoether, or amide linkage; T is a bond or substituted or unsubstituted alkyl or alkenyl; X is —(CH2)kCH3, —(CH2)kCOOH, —(CH2)kSO3H, —(CH2)kPO3H2, —(CH2)kN(J)2, or —(CH2)kP (J)2, preferably —(CH2)kCOOH or —(CH2)kSO3H; k is an integer from 0 to 2; J is hydrocarbyl or substituted hydrocarbyl; Y is —COOH, —H, —SO3H, —PO3H2, —N(J)2, or —P(J)2, preferably, —COOH; Z is —COOH, —H, —SO3H, —PO3H2, —N(J)2, or —P(J)2, preferably, —COOH; and i is an integer from 0 to 4, preferably 1 or 2.Type: GrantFiled: April 24, 2000Date of Patent: September 23, 2003Assignee: Sigma-Aldrich Co.Inventors: William K. Kappel, Venkatappa Viswanatha, Handong Li, Richard J. Mehigh, John G. Dapron
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Patent number: 6605526Abstract: A method for forming a wirebond connection to an integrated circuit structure includes forming an insulative structure overlaying a corrosion susceptible metal wiring within the integrated circuit structure, defining a via through the insulative structure above a portion of the corrosion susceptible metal without exposing the portion of the corrosion susceptible metal, and attaching a wirebond material to the portion of the corrosion susceptible metal. The attaching process includes a preliminary process of exposing the portion of the corrosion susceptible metal. The attaching completely covers the portion of the corrosion susceptible metal.Type: GrantFiled: March 16, 2000Date of Patent: August 12, 2003Assignee: International Business Machines CorporationInventors: Wayne John Howell, Ronald Lee Mendelson, William Thomas Motsiff, Jean-Guy Quintal, Sylvain Ouimet
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Publication number: 20030141483Abstract: A boiler water treatment chemical includes a heterocyclic compound with N-substituted amino group, or the salt thereof, and alkaline agent and/or water soluble polymer.Type: ApplicationFiled: December 19, 2002Publication date: July 31, 2003Inventors: Yukimasa Shimura, Shiro Taya
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Patent number: 6593278Abstract: The present invention relates to a method for inhibiting corrosion of corrosion-prone metal surfaces by organic acid-containing petroleum streams by providing an effective corrosion-inhibiting amount of certain sulfur and phosphorus-free aromatic compounds substituted with nitrogen, containing functional groups at the 5- or 3, 5-position, typically up to 1000 wppm, to the metal surface.Type: GrantFiled: July 13, 2001Date of Patent: July 15, 2003Assignee: ExxonMobil Research and Engineering CompanyInventors: Mohsen S. Yeganeh, Shawn Michael Dougal, Guido Sartori, David Craig Dalrymple, Cheayao Zhang, Saul Charles Blum, Liza Marie Monette
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Patent number: 6585933Abstract: A method and composition for controlling corrosion of metals, particularly ferrous-based metals in contact with aqueous systems is disclosed, which includes treating industrial waters with a combination of a tetrazolium salt of the general formula: where R1, R2 and R3 may be various organic or inorganic substitutents, where n may be 1 or 2, and at least one other aqueous system treatment material.Type: GrantFiled: May 3, 1999Date of Patent: July 1, 2003Assignee: BetzDearborn, Inc.Inventors: William C. Ehrhardt, Longchun Cheng, Dawn Stasney, Kim A. Whitaker
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Patent number: 6572788Abstract: The present inventors have discovered that amine oxides are highly effective as wood preservatives. The present invention provides a wood preservative composition comprising a biocidally effective amount of one or more amine oxides. Preferably, the wood preservative composition is substantially free of halogenated compounds (such as halides and chlorinated compounds) and quaternary ammonium compounds. The wood preservative composition of the present invention exhibits low toxicity, high stability in water, low corrosivity to metal substrates (such as steel substrates), excellent penetration and uniform distribution into wood, low odor, waterproofing properties, and high leaching resistance. The wood preservative composition may be applied to the surface of a wood substrate or be applied by pressure treating the wood substrate with the wood preservative composition. Other cellulosic and fiber materials, such as cotton, burlap, and like materials, may be preserved with the composition of the present invention.Type: GrantFiled: May 24, 2001Date of Patent: June 3, 2003Assignee: Lonza, Inc.Inventor: Leigh E. Walker
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Publication number: 20030100638Abstract: A plating solution containing zinc, an electrically conductive salt, an adsorbent, and at least one of mono- to hexavalent metal ions. A treatment using either a solution which contains, all per liter, 2-60 g Zn, 40-300 g caustic alkali, 0.01-50 g adsorbent, 0.002-10 g Fe, 0.002-10 g Co, 0.05-30 g Mn, 0.001-2 g Cu, 0.005-10 g Ni, 0.002-3 g of at least one chosen from among Mo, W, V, Ti, Al, Ca, Ba, and Sn, and 0.01-30 g aliphatic amine or aliphatic amine polymer or a solution which contains, all per liter, 2-40 g Zn, 40-170 g caustic alkali, 0.01-50 g adsorbent, either 0.001-3 g Fe and 0.001-3 g Co or 0.005-5 g Fe and 0.005-5 g Ni, and 0.01-30 g aliphatic amine or aliphatic amine polymer.Type: ApplicationFiled: September 9, 2002Publication date: May 29, 2003Applicant: Nihon Hyomen Kagaku Kabushiki KaishaInventors: Masaaki Yamamuro, Mitsuomi Katori
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Patent number: 6569264Abstract: The present invention provides a corrosion inhibitor composition for magnesium or magnesium alloys which contains as an effective component, at least one compound selected from among aromatic carboxylic acids and salts thereof as an effective component. Further, the present invention provides a surface treating agent for magnesium and/or magnesium alloy components which contains a phosphate, at least one compound selected from among aromatic carboxylic acids and salts thereof, and further, as required, at least one compound selected from among pyrazole compounds and triazole compounds,and surface-treating method using the surface treating agent.Type: GrantFiled: July 3, 2001Date of Patent: May 27, 2003Assignee: Otsuka Kagaku Kabushiki KaishaInventors: Kazunori Fukumura, Takahiko Shiraishi
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Patent number: 6562149Abstract: 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 circuit boards and for firmly bonding resists to the copper surfaces of printed circuit boards.Type: GrantFiled: August 22, 2000Date of Patent: May 13, 2003Assignee: Atotech Deutschland GmbHInventors: Udo Grieser, Heinrich Meyer
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Patent number: 6555600Abstract: Corrosion inhibiting thermoplastic alloys and methods of preparing same for use in fabricating molded articles with long-term corrosion protection. Masterbatches of nylon, polycarbonate, and polyethylene terephthalate high temperature engineering plastic resins together with selected corrosion inhibitor formulations are extruded for use in injection molding operations Molded articles are prepared from the high temperature engineering plastic resins and a solid phase corrosion inhibitor blended in situ, and wherein the resin consists essentially of nylon, polycarbonates, and polyethylene terephthalate, and wherein the corrosion inhibitor contains a blend of corrosion inhibitors such as cyclohexylammonium benzoate, sodium nitrite, benzotriazole, and sodium sebacate.Type: GrantFiled: February 5, 2001Date of Patent: April 29, 2003Assignee: Cortec CorporationInventors: Alex Sobkin, Boris A. Miksic, Michael Hobday
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Patent number: 6555506Abstract: A method of preventing corrosion in pipelines comprising draining pipeline of all residual compounds, blowing through with nitrogen and rinsing with a corrosion inhibiting rinsing agent.Type: GrantFiled: November 29, 2001Date of Patent: April 29, 2003Assignee: Illinois Tool Works Inc.Inventors: William Hopkins, Christopher Nettleship
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Publication number: 20030063999Abstract: The use of polymeric corrosion inhibiting compositions incorporating heterocyclic groups is disclosed. The polymers form a protective barrier on metallic components to aqueous systems and remain substantive on metallic surfaces over a wide pH range. Moreover, the polymers are resistant to oxidizing biocides, and are substantially impervious to repeated or prolonged exposure to corrosive agents.Type: ApplicationFiled: September 4, 2002Publication date: April 3, 2003Inventors: Tirthankar Ghosh, William M. Hann, Barry Weinstein
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Publication number: 20030063998Abstract: The use of a new class of polymeric corrosion inhibiting compositions incorporating pendant heterocyclic groups is disclosed. The polymers form a protective barrier on metallic components to aqueous systems and remain substantive on metallic surfaces over a wide pH range. Moreover, the polymers are resistant to oxidizing biocides, and are substantially impervious to repeated or prolonged exposure to corrosive agents.Type: ApplicationFiled: September 4, 2002Publication date: April 3, 2003Inventors: Tirthankar Ghosh, William M. Hann, Barry Weinstein
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Patent number: 6540959Abstract: 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 after sublimation and condensation on metal surfaces can stabilize the pH value of a condensed water film in the range 4.8≦pH≦6.5 (referred to 25° C.), and use of the combinations of substances as vapor-phase corrosion inhibitors in packaging or for storage in closed spaces for protecting preferably metals that cannot be passivated, like copper, silver, manganese, magnesium and their alloys, against atmospheric corrosion.Type: GrantFiled: July 21, 1999Date of Patent: April 1, 2003Assignee: EXCOR Korrosionsforschung GmbHInventors: Georg Reinhard, Gerhard Hahn, Signe Lautner, Urte Ludwig
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Publication number: 20030049161Abstract: Methods and compositions effective to prevent deposition of fouling agents, preferably polymerization precursors, on handling equipment, particularly during solvent recovery.Type: ApplicationFiled: August 6, 2001Publication date: March 13, 2003Inventor: Marilyn Wood Blaschke
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Patent number: 6521028Abstract: 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 mixtures thereof, the production of undesirable by-products and contamination of the product with undesirable solvents are minimized, if not eliminated. Using the preparation methods of the present invention low hazard corrosion inhibitors and aqueous cleaning solutions using these inhibitors may be prepared. In fact, by preparing dodecyl pyridinium bromide in dipropylene glycol methyl ether as the solvent, a particularly desirable corrosion inhibitor characterized by a low toxicity and a high flash point has been prepared. The present invention thus provides the safer corrosion inhibitors and cleaning solutions long sought by industrial cleaning services.Type: GrantFiled: August 28, 2000Date of Patent: February 18, 2003Assignee: HydroChem Industrial Services, Inc.Inventor: Wayne W. Frenier
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Publication number: 20030030034Abstract: The present invention relates to a process for making and a method for using a corrosion inhibitor composition to reduce the corrosion rate of a metal by a fluid containing a corrosion agent. The corrosion inhibitor composition comprises at least a quaternized compound having a substituted diethylamino moiety. Examples of the quaternized compound having a substituted diethylamino moiety are quaternized diacrylamino imidazolines.Type: ApplicationFiled: July 18, 2002Publication date: February 13, 2003Inventor: George Richard Meyer
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Patent number: 6517617Abstract: 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 corrosion or microbiologically influenced corrosion is disclosed. Also disclosed is a method for utilizing this material to protect both existing pipelines and the raw stock used to construct pipelines and various apparatus for applying a coating of the composition, cleaning, and maintenance of the passive coating. Also disclosed is a method to recycle the composition to be used in other industrial pacification processes.Type: GrantFiled: September 20, 2001Date of Patent: February 11, 2003Assignee: WHI USA, Inc.Inventors: Douglas M. Chartier, Calvin L. Reid
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Patent number: 6464901Abstract: Non-halogen substituted, nitrogen containing, aromatic compounds are disclosed which are effective copper corrosion inhibitors in aqueous systems being treated with a halogen biocide. The materials of the present invention exhibit copper corrosion inhibition comparable to tolyltriazole in the absence of halogen, copper corrosion rates of less than about 2.5 mills per year in aqueous systems where halogen is present; and do not exhibit a detrimental effect on halogen demand in an aqueous system being treated.Type: GrantFiled: May 5, 2000Date of Patent: October 15, 2002Inventor: Longchun Cheng
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Patent number: 6464899Abstract: Compositions and methods for inhibiting corrosion of metallic surfaces are disclosed. The corrosion-inhibiting compositions are cost efficient, easy to use and can be conveniently removed or replaced. The corrosion-inhibiting compositions include a putty-like base material that is pliable and has sufficient tackiness to be securely affixed to surfaces. Corrosion inhibiting compounds are combined with the base material. These compositions provide a vapor phase corrosion inhibitor for both direct and indirect contact with metallic objects.Type: GrantFiled: June 2, 2000Date of Patent: October 15, 2002Assignee: Henkel Loctite CorporationInventors: Hans E. Haas, Matthew P. Burdzy
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Patent number: 6420323Abstract: A low-foam emulsifier system is presented containing (a) an ethoxylate/propoxylate of one or more C8-C18 fatty alcohols, where the ethoxylate/propoxylate contains 2 to 6 ethylene oxide units and 4 to 8 propylene oxide units, with (b) a fatty alcohol propoxylate or distillation residue of fatty alcohol or fatty alcohol propoxylate, where the fatty alcohol contains 12 to 24 carbon atoms and up to three propylene oxide units. The weight ratio of (a) to (b) is from 1:0.3 to 0.3:1. The emulsifier system produces a low amount of foam, and is useful in industrial metal processing applications such as cleaning, corrosion protection or cooling lubricant emulsions.Type: GrantFiled: July 27, 1999Date of Patent: July 16, 2002Assignee: Henkel Kommanditgesellschaft auf AktienInventors: Juergen Geke, Horst-Dieter Speckmann, Bernd Stedry
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Patent number: 6402990Abstract: The present invention provides methods and compositions for the reduction of the corrosion rate of already corroding steel reinforcements embedded in a hardened concrete structure as well as for the protective corrosion inhibition of uncorroded steel reinforcements embedded in a hardened concrete structure exposed to aggressive environments. The inventive new compositions employed for the novel method are essentially based on one or more amino- and/or hydroxyalkylamino compound(s), which are partially or completely neutralized with one or more inorganic acid(s) and/or derivatives thereof and/or aliphatic carboxylic- and/or aromatic carboxylic acid(s), one or more surfactant(s) and one or more water-based or water-thinnable water repellent agent(s) selected from the group of organosilicones.Type: GrantFiled: May 11, 1999Date of Patent: June 11, 2002Assignee: Sika AG, Vorm, Kaspar Winkler & Co.Inventors: Beat Marazzani, Theodor A. Bürge, Urs Mäder
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Patent number: 6403028Abstract: This invention relates to an all-organic corrosion inhibiting composition comprising (a) 6,6,6-(1,3,5-triazine-2,4,6-triyltriimino) tris hexanoic acid; and (b) a water-soluble phosphonated oligomer salt. The invention also relates to a process for inhibiting corrosion in a closed recirculating cooling water system.Type: GrantFiled: October 18, 1999Date of Patent: June 11, 2002Assignee: Ashland Inc.Inventors: Steven J. Colby, Dwight E. Emerich, Edward S. Beardwood
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Publication number: 20020066889Abstract: The present invention provides methods and compositions for the reduction of the corrosion rate of already corroding steel reinforcements embedded in a hardened concrete structure as well as for the protective corrosion inhibition of uncorroded steel reinforcements embedded in a hardened concrete structure exposed to aggressive environments.Type: ApplicationFiled: May 11, 1999Publication date: June 6, 2002Inventors: BEAT MARAZZANI, THEODOR A. BURGE, URS MADER
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Publication number: 20020063241Abstract: Drag reducers having the formula: 1Type: ApplicationFiled: September 11, 2001Publication date: May 30, 2002Inventors: Bernardus Antonius Maria Oude Alink, Vladimir Jovancicevic
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Patent number: 6379587Abstract: A method and composition for controlling corrosion of metals, particularly ferrous-based metals in contact with aqueous systems is disclosed, which includes treating industrial waters with a combination of (a) a tetrazolium salt of the general formula: wherein R1, R2 and R3 may be various organic or inorganic substituents, including monomers or oligomers of the above structure, and (b) polyacrylic or polymaleic acid.Type: GrantFiled: May 3, 1999Date of Patent: April 30, 2002Assignee: BetzDearborn Inc.Inventor: Longchun Chen
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Patent number: 6372918Abstract: The invention relates to compounds of the formula 1 R1—O—(A—O)x—(CH2)y—R2 (1) in which R1 is branched or straight-chain C4-C30-alkyl, C4-C30-alkenyl or C4-C30-alkylaryl, A is C2-C4-alkylene, x is an integer from 1 to 100, y is 1, 2, 3 or 4 and R2 is a radical selected from structures of the formulae 2 and 3 —CO—NR3R4 (2) in which one of the radicals R3 and R4 is a hydrocarbon chain which has at least one free NH or NH2 group and the other radical is hydrogen or a hydrocarbon chain which has at least one free NH or NH2 group and R5 is hydrogen or a hydrocarbon chain which has at least one free NH or NH2 group.Type: GrantFiled: June 30, 2000Date of Patent: April 16, 2002Assignee: Clariant GmbHInventors: Michael Feustel, Peter Klug
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Patent number: 6365100Abstract: Polymethylenepolyaminedipropionamides are carbonic corrosion inhibitors devoid of toxicity to the marine environment.Type: GrantFiled: September 20, 1999Date of Patent: April 2, 2002Assignee: CECA, S.A.Inventors: Tong Eak Pou, Stephane Fouquay
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Patent number: 6350395Abstract: A stabilizer composition comprising a) an N-alkyl morpholine and b) a straight-chain or cyclic aliphatic amine containing no hetroatoms other than N with a boiling point of at least 150° C. The stabilizer composition is useful for stabilizing a halogenated hydrocarbon against degradation.Type: GrantFiled: June 16, 2000Date of Patent: February 26, 2002Assignee: The Dow Chemical CompanyInventor: Marius Kuemin
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Patent number: 6346206Abstract: An oxygen scavenger characterized in that the effective component thereof consists of a heterocyclic compound with N—N bond in a ring thereof. An oxygen scavenger characterized in that the effective component thereof consists of a heterocyclic compound with N-substituted amino group. An oxygen scavenger characterized in that the effective component thereof consists of a heterocyclic compound represented by the following formula: (wherein a, b are integers between 0 and 5 to satisfy a relation “2≦a+b≦5”). An oxygen scavenger characterized in that the effective component thereof consists of azodicarbonamide. An oxygen scavenger characterized by including a heterocyclic compound with N-substituted amino group, or the salt thereof, and a hydroxybenzene derivative. Those may contain further neutral amine, alkalic agent and/or water soluble polymer.Type: GrantFiled: September 23, 1999Date of Patent: February 12, 2002Assignee: Kurita Water Industries Ltd.Inventor: Yukimasa Shimura
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Patent number: 6340438Abstract: A corrosion inhibiting admixture for concrete is disclosed comprising a combination of organic (amines) and inorganic (nitrites) fractions that provide a synergistic effect when present at a specific ratio. Such a synergistic effect occurs when the amine:nitrite ratio (% by weight) is between 1.5 to 2.5 resulting in the admixture providing excellent corrosion inhibiting capabilities.Type: GrantFiled: April 19, 1999Date of Patent: January 22, 2002Assignee: Tomahawk, Inc.Inventors: Donald R. Lane, Jose A. Melendez, Violeta F. Munteanu, Frederick D. Kinney
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Publication number: 20010045546Abstract: A method of preventing corrosion in pipelines comprising draining pipeline of all residual compounds, blowing through with nitrogen and rinsing with a corrosion inhibiting rinsing agent.Type: ApplicationFiled: February 23, 2001Publication date: November 29, 2001Inventors: William Hopkins, Christopher Nettleship
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Publication number: 20010030315Abstract: According to the present invention, there is provided an anticorrosive treating concentrate usable for an exposed surface of a metal (e.g. copper or a copper alloy), containing an anticorrosive agent and a precipitation inhibitor and having a pH of 4 to 12 when used in the form of an aqueous solution, in which concentrate the anticorrosive agent is a triazole type compound and/or a derivative thereof and is contained in a concentration of 0.05 to 20 % by weight and the precipitation inhibitor is a compound having at least one nitrogen atom but no metal atom in the molecule.Type: ApplicationFiled: March 5, 2001Publication date: October 18, 2001Applicant: NEC Corporation and Sumitomo Chemical Company LimitedInventors: Hidemitsu Aoki, Hiroaki Tomimori, Masayuki Takashima
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Patent number: 6303079Abstract: The present invention relates to a process for making and a method for using a corrosion inhibitor composition to reduce the corrosion rate of a metal by a fluid containing a corrosion agent. The corrosion inhibitor composition comprises at least a quaternized compound having an amido moiety. An example of the quaternized compound is a quaternized amido imidazoline.Type: GrantFiled: March 15, 1999Date of Patent: October 16, 2001Assignee: Nalco/Exxon Energy Chemicals, L.P.Inventor: George Richard Meyer
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Patent number: 6299836Abstract: Corrosion in aqueous alkanolamine, physical solvents, or combination of alkanolamine and physical solvent solutions used to remove acid gases from natural gas, synthetic gas, or light hydrocarbon streams can be reduced by addition of mixtures of oxygen scavengers or mixtures of oxygen scavengers and sodium molybdate. The oxygen scavengers must be promoted to reduce metal surfaces in contact with the solutions to a more passive, harder, and insoluble form at the operating temperature of the treating system. The sodium molybdate provides additional passivation especially in the imperfections on the surface of the metal where corrosion accelerates.Type: GrantFiled: October 14, 1998Date of Patent: October 9, 2001Assignee: Coastal Chemical Co., L.L.C. (A Louisiana limited liability company)Inventors: Ray R. Veldman, David O. Trahan
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Patent number: 6261346Abstract: 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): where R1, R2 and R3 independently of one another represent an alkyl or hydroxyalkyl group containing 1 to 4 carbon atoms, an aryl or alkylaryl group or a group corresponding to formula (II): A− is an anion, n is the number 2 or 3, p is a number of 1 to 3 and R5 is an alkyl or alkenyl group containing 7 to 23 carbon atoms and 0, 1, 2 or 3 double bonds, and R4 is a group corresponding to formula (II) or (III): where R1, R2 and R3 are as defined above and Z is a group —(CH2)m— or a group corresponding to formula (IV): m is an integer of 1 to 6, X is a group NH or an oxygen atom and D is a dimer fatty acid residue containing on average 36 to 54 carbon atoms; (b) combining the corrosion inhibitor with liquid aqueous, liquid non-aqueous or gaseous meType: GrantFiled: July 29, 1999Date of Patent: July 17, 2001Assignee: Cognis Deutschland GmbHInventors: Wolfgang Breuer, Robert Schuetz, Guenther Uphues, Claus-Peter Herold, Rafael Pi
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Patent number: 6248181Abstract: Here are provided a composition for hydrophilic treatment of aluminum or aluminum alloy which can form film having persistent corrosion resistance and hydrophilicity and not generating odor, and a method for hydrophilic treatment.Type: GrantFiled: February 19, 1999Date of Patent: June 19, 2001Assignee: Nihon Parkerizing Co., Ltd.Inventors: Tomohiro Osako, Hiroki Kojima, Masahiro Motozawa
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Patent number: 6238621Abstract: There are disclosed corrosion inhibiting compositions comprising (a) at least one amido acid or salt thereof and (b) at least one of an aryltriazole or 3-amino-1,2,4-triazole wherein the molar ratio of (a) to (b) is about 0.34:1 to about 5:1, and aqueous metal working fluids containing the corrosion inhibiting compositions of the invention.Type: GrantFiled: May 25, 1999Date of Patent: May 29, 2001Assignee: Solutia Inc.Inventors: Dennis J. Kalota, Yueting Chou, David C. Silverman
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Patent number: 6207079Abstract: This invention relates to a scale inhibiting composition for aqueous systems comprising (a) polyaspartic acid, and (b) a water soluble phosphonated oligomer. The compositions are effective scale and/or corrosion inhibitors, but are also advantageous from an environmental standpoint because they are non-toxic, contain no heavy metals, and have little or no phosphorus. They also have sufficient calcium/hardness tolerance, are chlorine/bromine stable, and are effective corrosion inhibitors.Type: GrantFiled: January 28, 1999Date of Patent: March 27, 2001Assignee: Ashland Inc.Inventors: Pavol Kmec, Dwight E. Emerich
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Patent number: 6200499Abstract: Compositions comprising certain amino acids such as aspartic acid, when fully ionized at alkaline pH, function effectively as corrosion inhibitors for ferrous metals in the presence of an aqueous medium. This effect is enhanced with increased fluid velocity.Type: GrantFiled: June 7, 1995Date of Patent: March 13, 2001Assignee: Solutia Inc.Inventors: Dennis J. Kalota, David C. Silverman
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Patent number: 6187227Abstract: 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 have from 4 to about 10 sulfur atoms on each of the crown rings. The polymeric thiacrown ether ring structures are substituted with polymerized ethylenically unsaturated monomers and have from 4 to about 10 sulfur atoms on each of the crown rings. In some embodiments of the invention, a linkage “M” connects the thiacrown ether ring structures and the polymers and M is O; S; COO; C1 to C5 substituted or unsubstituted linear or branched alkylene wherein the substituent is OH, SH, F, Br, Cl, I, COOH, amine, mono- or di- C1 to C5 alkylamino, C1 to C3 lower alkanoylamino or nitro; or M is NR6 where R6 is H or C1 to C5 alkyl.Type: GrantFiled: June 2, 1998Date of Patent: February 13, 2001Assignee: BetzdearbornInventors: Ljiljana V. Minevski, Janet A. Gaboury
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Patent number: 6180057Abstract: Corrosion inhibiting compositions and methods for inhibiting the corrosion of metal surfaces by corrosive aqueous fluids are provided. In accordance with the invention, a corrosion inhibiting composition comprised of one or more aldehyde oligomers having the general formula are combined with the corrosive aqueous fluid.Type: GrantFiled: June 19, 1998Date of Patent: January 30, 2001Assignees: Nalco/Exxon Energy Chemicals L.P., Halliburton Energy Services, Inc.Inventors: Grahame N. Taylor, Juanita M. Cassidy, Dennis A. Williams, Gary P. Funkhouser
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Patent number: 6174461Abstract: A concrete sealer material is provided containing a corrosion inhibitor which is free to migrate upon leeching from the concrete sealer. The inhibitor retards the rate of corrosion of reinforcements contained within the concrete, including metallic mesh, grid, rebar, and other metallic articles utilized for reinforcement. The sealer material is preferably a film forming component of silicate or silane modified siloxanes. The corrosion inhibitor is preferably an amine salt, an amino alcohol, alkalized salt of glucoheptonates, or, calcium nitrite and mixtures thereof. A compatibility enhancer of an aminoalkyl silane can be added to the blend.Type: GrantFiled: June 29, 1999Date of Patent: January 16, 2001Assignee: Cortec CorporationInventors: Boris A. Miksic, Charles M. Suchy, Margarita Kharshan
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Patent number: 6171521Abstract: This invention is directed to a zwitterionic water-soluble imine of formula: wherein R1 is heterocyclyl, heteroaryl, aryl, arylalkyl, cycloalkyl or lower alkyl; R2 is alkyl, alkenyl, aminoalkyl, diaminoalkyl, hydroxyalkyl, alkoxyalkyl, thioalkyl, alkylthioalkyl or arylalkyl; R3 is hydrogen and lower alkyl, or R1 and R3 taken together form a cycloalkyl, p is 2, 3, 4 or 5; and Z is CO2−, OCO2−, SO3−, OSO3−, PO3− or OPO3− which are useful as ferrous metal corrosion inhibitors.Type: GrantFiled: September 22, 1999Date of Patent: January 9, 2001Assignee: Nalco/Exxon Energy Chemicals, L.P.Inventor: G. Richard Meyer
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Patent number: 6126860Abstract: A hydrolysis stabilizer for an ester group-containing resin, which comprises as a main component a carbodiimide having at least two carbodiimide groups in the molecule and resulting from 4,4'-dicyclohexylmethane diisocyanate, isophorone diisocyanate or a mixture of 4,4'-dicyclohexylmethane diisocyanate and isophorone diisocyanate, or from a mixture of tetramethylxylylene diisocyanate with 4,4'-dicyclohexylmethane diisocyanate, isophorone diisocyanate or a mixture of 4,4'-dicyclohexylmethane diisocyanate and isophorone diisocyanate; and a process for the hydrolysis stabilization of an ester group-containing resin, which comprises mixing a polyester type resin with the above hydrolysis stabilizer.Type: GrantFiled: December 23, 1998Date of Patent: October 3, 2000Assignee: Nisshinbo Industries, Inc.Inventors: Yasuo Imashiro, Ikuo Takahashi, Naofumi Horie, Takeshi Yamane
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Patent number: 6120705Abstract: 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 treating the metal with an effective amount of effective amount of one or more hydrocarbyl-substituted sulfonyl amido diphenylamine compounds for the corrosion protection of the metal article. These compound(s) are of the formula p-(R--SO.sub.2 --NH--C.sub.6 H.sub.4 --NH)--C.sub.6 H.sub.5, where R is a substituted or unsubstituted hydrocarbyl group selected from the group consisting of alkyl, aryl, alkaryl, aralkyl, alkenyl, and cycloalkyl. A particularly preferred compound is p-(p-toluene sulfonyl amido)-diphenylamine.Type: GrantFiled: September 28, 1998Date of Patent: September 19, 2000Assignee: Polymer Alloys LLCInventors: Peter J. Spellane, Edward D. Weil
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Patent number: 6103459Abstract: Novel compounds that may be used as chemical vapor deposition precursors, thermochromic materials, conductive polymers, light-emitting diode precursors, and molecular charge-transfer salt precursors are provided. In addition, a novel compound that can be used to make the aforementioned compounds is provided. Still further, another aspect of the present invention is to provide methods for making and using the novel compounds provided.Type: GrantFiled: March 9, 1999Date of Patent: August 15, 2000Assignee: Midwest Research InstituteInventor: Bruce Diel
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Patent number: 6103144Abstract: Non-halogen substituted, nitrogen containing, aromatic compounds are disclosed which are effective copper corrosion inhibitors in aqueous systems being treated with a halogen biocide. The materials of the present invention exhibit copper corrosion inhibition comparable to tolyltriazole in the absence of halogen, copper corrosion rates of less than about 2.5 mills per year in aqueous systems where halogen is present; and do not exhibit a detrimental effect on halogen demand in an aqueous system being treated.Type: GrantFiled: April 12, 1999Date of Patent: August 15, 2000Assignee: BetzDearborn Inc.Inventor: Longchun Cheng
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Patent number: 6083416Abstract: Organic compounds useful as anticorrosion agents in refrigeration systems. The organic compounds can be added directly into the refrigeration systems. Alternatively the organic compound can be added to an alkali metal halide absorption refrigeration solutions. The organic compounds can minimize corrosion of the refrigeration system.Type: GrantFiled: July 16, 1997Date of Patent: July 4, 2000Assignee: FMC CorporationInventors: Shyam Kumar Verma, Manuel Sarkis Mekhjian, George Robert Sandor, Philip John Boon
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Patent number: 6083288Abstract: A strongly basic, hydrophobic amine which prevents the deposition of fuel-insoluble carboxylate deposits in fuel tanks and fuel transfer equipment is contained in a fuel additive package which minimizes the degradation of a hydrocarbon fuel during storage.Type: GrantFiled: July 7, 1998Date of Patent: July 4, 2000Assignee: BP Amoco CorporationInventor: Leslie R. Wolf