Oxygen Organic Compound Containing Patents (Class 252/392)
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Patent number: 4670186Abstract: There is described a composition comprising an acylated, alkylated polyamine, an alkylated polyamine, an alkynol and a surfactant. The compositions are useful as corrosion inhibitors for acid systems and ferrous pickling systems and in acidizing media in the treatment of oil-bearing earth formations.Type: GrantFiled: December 17, 1982Date of Patent: June 2, 1987Assignee: Petrolite CorporationInventor: Patrick M. Quinlan
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Patent number: 4668245Abstract: The present invention provides a method for inhibiting corrosion and elastomer swelling and degradation caused by alcohol and alcohol-containing fuels and for increasing lubricity of alcohol or alcohol-containing fuels, comprising the step of adding to alcohol or alcohol-containing fuels, a fuel additive comprising one or more reaction products of a carboxylic acid or acid chloride selected from the group consisting of unsubstituted aromatic carboxylic acids, aliphatic carboxylic acids, nitro-substituted aromatic carboxylic acids and their corresponding acid chlorides, and an amine selected from the group consisting of aliphatic amines, cycloaliphatic amines, and aromatic amines.Type: GrantFiled: October 22, 1986Date of Patent: May 26, 1987Assignee: BankAmerica CorporationInventor: Leroy Schieler
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Patent number: 4664826Abstract: The present invention provides certain metal (e.g., Ca or Mg) ester salt derivatives capable of exhibiting friction modification, oxidation inhibition, and corrosion inhibition properties in power transmitting fluids such as automatic transmission fluids. These salts are derived from mono or diesters prepared by the reaction of an alkanol (e.g., thio-bis-ethanol) and a hydrocarbon substituted succinic acid or anhydride, such as octadecenyl succinic anhydride.Type: GrantFiled: August 7, 1985Date of Patent: May 12, 1987Assignee: Exxon Research & Engineering Co.Inventors: Antonio Gutierrez, Stanley J. Brois, Jack Ryer, Harold E. Deen
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Patent number: 4664884Abstract: A corrosion inhibitor for ferrous and non-ferrous aqueous systems comprising (a) a water soluble phosphonic acid or salt thereof, preferably an amino methylene phosphonic acid; (b) a phosphonocarboxylic acid, preferably a phosphonoalkane carboxylic acid; and (c) a triazole, preferably benzotriazole or tolyltriazole.Type: GrantFiled: June 14, 1985Date of Patent: May 12, 1987Assignee: Drew Chemical CorporationInventors: Michael A. Mullins, Peter A. Thomas
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Patent number: 4663124Abstract: A series of water-dispersible corrosion inhibiting solutions are disclosed which contain about 10 ppm to about 70% by weight of the reaction product of a dione and a primary polyamine. The use of these reaction products dramatically reduces H.sub.2 S and CO.sub.2 corrosion rates when used in a continuous treatment of preferbly about 10 ppm to about 250 ppm or when used in a batch filming treatment.Type: GrantFiled: September 3, 1985Date of Patent: May 5, 1987Assignee: Texaco, Inc.Inventor: Michael J. Incorvia
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Patent number: 4663121Abstract: The corrosion of metals in contact with corrosive fluids is effectively inhibited by the addition of one or more phenyloxazoles, preferably 2,5-diphenyloxazole.Type: GrantFiled: October 15, 1985Date of Patent: May 5, 1987Assignee: The Dow Chemical CompanyInventors: Edwin R. Henson, Joel G. Courtwright
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Patent number: 4661277Abstract: Certain partial esters of phthalic acid provide effective rust inhibition for greases and other solid lubricants.Type: GrantFiled: January 17, 1986Date of Patent: April 28, 1987Assignee: Mobil Oil CorporationInventors: Alfred B. Piotrowski, Richard S. Herd
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Patent number: 4645515Abstract: Disclosed are polyamino alkenyl or alkyl succinimides which have been modified by treatment with a lactone to yield polyamino alkenyl or alkyl succinimides wherein one or more of the basic nitrogens of the polyamino moiety is substituted with a hydroxyalkylene carbonyl group. The additives so disclosed are useful as dispersants in lubricating oils, gasolines, marine crankcase oils and hydraulic oils.Type: GrantFiled: April 12, 1985Date of Patent: February 24, 1987Assignee: Chevron Research CompanyInventor: Robert H. Wollenberg
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Patent number: 4642221Abstract: Corrosion of metal surfaces in cooper or copper alloy cooling water systems is inhibited by the addition of small amounts of aromatic triazoles and iminodicarboxylic acids or derivatives thereof to the cooling water system.Type: GrantFiled: July 5, 1983Date of Patent: February 10, 1987Assignee: Atlantic Richfield CompanyInventors: Gerald D. Hansen, Joseph N. Biber
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Patent number: 4640787Abstract: Certain branched chain amines and carboxylic derivatives thereof are useful additives for lubricants and fuels.Type: GrantFiled: June 22, 1984Date of Patent: February 3, 1987Assignee: Phillips Petroleum CompanyInventor: Alexander D. Schuettenberg
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Patent number: 4631138Abstract: Triazones and triazine thiones are disclosed as corrosion inhibitors for ferrous metals.Type: GrantFiled: February 7, 1985Date of Patent: December 23, 1986Assignee: Petrolite CorporationInventors: Marshall E. Johns, Keith D. Strassner, Thomas G. Braga
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Patent number: 4628836Abstract: A process is disclosed for inhibiting corrosion of metal surfaces and deposition of particulates in an air preheater system. In the process, a composition (preferably aqueous) comprising a corrosion inhibiting amine and a surfactant having an HLB value of from about 8 to about 20, preferably from about 10 to about 14, is supplied to the combustion gas-in side and/or to the air-in side of the air preheater for protection of the metal surfaces and minimizing such deposits. In a preferred embodiment, the process of the invention can employ an amine salt of a C.sub.12 to C.sub.24 tertiary alkyl amine an amine oxide, or an amine oxide salt, either alone or with a surfactant.Type: GrantFiled: August 24, 1984Date of Patent: December 16, 1986Assignee: Waterscience, Inc.Inventor: Robert J. Littmann
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Patent number: 4626411Abstract: A composition containing a hydroxylamine compound; a quinone, a dihydroxybenzene, a diaminobenzene, or an aminohydroxybenzene compound; and a neutralizing amine is an excellent oxygen scavenger and corrosion inhibitor in boiler water and other aqueous systems.Type: GrantFiled: April 17, 1985Date of Patent: December 2, 1986Assignee: Dearborn Chemical Company, LimitedInventors: John J. Nemes, Harvey W. Thompson, John E. Waller
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Patent number: 4614600Abstract: An anti-corrosive composition is disclosed which comprises the condensate of a polyamine such as diethylenetriamine, triethylenetetramine or aminoethylethanol amine with a 21 or 22 carbon fatty polycarboxylic acid or acid anhydride. The composition may additionally include the condensation products of the above polyamines with either tall oil fatty acids or Rosin S. Propargyl alcohol has been found to enhance the anti-corrosive effects of the composition. The compositions are especially useful in well drilling operations where a strong inorganic acid is used to facilitate crude oil flow.Type: GrantFiled: October 31, 1984Date of Patent: September 30, 1986Assignee: Westvaco CorporationInventors: Peter Schilling, David V. Braddon
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Patent number: 4609378Abstract: Disclosed are polyaminoalkenyl or alkyl succinimides which have been modified by treatment with a compound of the formula: ##STR1## R.sub.4 is an alkylene group of from 2 to 3 carbon atoms or an alkylene group of from 2 to 3 carbon atoms substituted with from 1 to 3 alkyl groups of from 1 to 2 carbon atoms each. The modified polyamino alkenyl or alkyl succinimides of this invention have been found to possess dispersancy and detergency in lubricating oils. These modified succinimides are also useful as dispersants and detergents in fuels.Type: GrantFiled: April 12, 1985Date of Patent: September 2, 1986Assignee: Chevron Research CompanyInventor: Robert H. Wollenberg
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Patent number: 4609377Abstract: A novel fuel composition contains ethanol or gasohol, and, as a wear-corrosion-inhibiting additive, an aminated polyisopropoxylated polyethoxylated alkylphenol ##STR1## wherein R is a (C.sub.5 -C.sub.30) alkyl, alkaryl, aralkyl, aryl, or cycloalkyl group, x is a numeral of about 5 to about 30, and y is a numeral of about 1 to about 20.Type: GrantFiled: October 7, 1985Date of Patent: September 2, 1986Assignee: Texaco Inc.Inventors: Rodney L. Sung, Wheeler C. Crawford
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Patent number: 4609531Abstract: The use, as anticorrosion agents, of alkenylsuccinic acid half-amides of the formulae ##STR1## in which R denotes C.sub.6 -C.sub.12 -alkenyl and K denotes a proton or an ammonium ion of the formula NHR.sub.1 R.sub.2 R.sub.3 and R.sub.1, R.sub.2 and R.sub.3 are identical or different and denote hydrogen, C.sub.1 -C.sub.12 -alkyl, 2-hydroxyethyl or 2-hydroxypropyl.Type: GrantFiled: May 25, 1984Date of Patent: September 2, 1986Assignee: Hoechst AktiengesellschaftInventors: Werner Ritschel, Horst Lorke
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Patent number: 4604226Abstract: Corrosion inhibitor compositions comprising a mixture of an amine neutralized phosphate ester and a volatile amine selected from the group consisting of cyclohexylamine, morpholine and isopropylamine. Such compositions are useful in inhibiting corrosion on the interior surfaces of tin-plated aerosol cans containing water-based aerosol formulations.Type: GrantFiled: March 22, 1985Date of Patent: August 5, 1986Assignee: E. I. Du Pont de Nemours and CompanyInventor: Philip L. Bartlett
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Patent number: 4604212Abstract: The instant invention is directed to a process for inhibiting corrosion and the formation and deposition of scale in aqueous systems comprising adding to the system at least 0.1 ppm. of a water soluble polymer, having an intrinsic viscosity of 0.05 to 2.5 dl/g, prepared from:(A) 50 to 95%, by weight, of an unsaturated carboxylic acid, or its salt, and(B) 5 to 50%, by weight, of a betaine-containing monomer selected from the group consisting of: ##STR1## wherein R, which may be the same or different, is hydrogen, a straight or branched, alkyl or an aryl or alkylaryl group of from 1 to 20 carbon atoms;R.sup.Type: GrantFiled: May 16, 1985Date of Patent: August 5, 1986Assignee: Calgon CorporationInventor: Gary F. Matz
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Patent number: 4604227Abstract: A rust preventive composition effective in protecting metal surfaces by direct or vapor phase contact contains as essential ingredients: (A) an aryl phosphate; (B) a polyolester; (C) a calcium petroleum sulfonate; and (D) an alkylamine alkanol.Type: GrantFiled: November 16, 1984Date of Patent: August 5, 1986Assignee: Stauffer Chemical CompanyInventor: Joseph F. Anzenberger, Sr.
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Patent number: 4602958Abstract: Corrosion inhibitor compositions comprising a mixture of (1) a volatile amine selected from the group consisting of cyclohexylamine, isopropylamine and morpholine and (2) a tertiary C.sub.12-14 alkylammonium carboxylate selected from the group consisting of a C.sub.12-14 alkylammonium benzoate and a tertiary C.sub.12-14 alkylammonium-N-oleoyl sarcosinate. Such compositions are useful in inhibiting corrosion on the interior surfaces of tin-plated aerosol cans containing water-based aerosol formulations.Type: GrantFiled: April 9, 1985Date of Patent: July 29, 1986Assignee: E. I. Du Pont de Nemours and CompanyInventor: Philip L. Bartlett
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Patent number: 4600409Abstract: A fuel composition is disclosed containing 30 to 10,000 ppm of an additive comprising quaternized polyoxyalkylene amine salts of molecular weight 500 to about 2500, the polyoxyalkylene moiety comprising 1 to 30 oxyalkylene units, the units having 2 to 4 carbon atoms and the amine comprising 1 to 12 amine nitrogen atoms and 2 to 40 carbon atoms and having a connecting moiety linking the polyoxyalkylene moiety to the amine moiety. Also disclosed are lubricating oil compositions containing the additive, concentrates of this additive and the composition of the additive itself.Type: GrantFiled: October 25, 1985Date of Patent: July 15, 1986Assignee: Chevron Research CompanyInventor: Curtis B. Campbell
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Patent number: 4600530Abstract: Corrosion inhibitor compositions comprising a mixture of a nitroalkane containing 1-3 carbon atoms and a tertiary C.sub.12-14 alkylammonium carboxylate selected from the group consisting of a C.sub.12-14 alkylammonium benzoate and a tertiary C.sub.12-14 alkylammonium-N-oleoyl sarcosinate. Such compositions are useful in inhibiting corrosion on the interior surfaces of tin-plated aerosol cans containing water-based aerosol formulations.Type: GrantFiled: March 27, 1985Date of Patent: July 15, 1986Assignee: E. I. Du Pont de Nemours and CompanyInventor: Philip L. Bartlett
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Patent number: 4597895Abstract: Corrosion inhibitor compositions comprising a mixture of a nitroalkane containing 1-3 carbon atoms and a cocoamide of diethanolamine. Such compositions are useful in inhibiting corrosion on the interior surfaces of tin-plated aerosol cans containing water-based aerosol formulations.Type: GrantFiled: December 6, 1984Date of Patent: July 1, 1986Assignee: E. I. Du Pont de Nemours and CompanyInventor: Philip L. Bartlett
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Patent number: 4595425Abstract: An organic polymer containing composition suitable for use as a quenchant having incorporated therein a non-nitrite inhibitor system, which comprises an aromatic compound having at least one substituent nitro group and/or the water soluble organic or inorganic salt thereof and a hydroxy substituted mono aromatic carboxylic acid and/or the water soluble organic or inorganic salt thereof. In another embodiment a pH adjustment agent capable of providing an initial pH of at least 7.5 is also present.Type: GrantFiled: March 29, 1985Date of Patent: June 17, 1986Assignee: Union Carbide CorporationInventor: Ronald H. Harding
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Patent number: 4595523Abstract: There is provided a corrosion inhibitor for use in the storage, distribution and use of alcohol as a fuel for internal combustion engines. The inhibitor comprises a triazole and an amine salt of an acid. There is further provided a corrosion-inhibited alcohol fuel and a method of inhibiting corrosion in metals.Type: GrantFiled: July 1, 1983Date of Patent: June 17, 1986Assignee: Petrolite CorporationInventors: J. Irvine Knepper, Robert J. Garrecht, George W. Dear
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Patent number: 4587025Abstract: Hydrocarbyl ammonium hydrocarbyl carboxylate internal salts and their metal-containing derivatives are made by reacting certain amines with certain organic acids to obtain the former and reacting that product with a metal oxide or salt to obtain the latter. These are used in lubricants and liquid fuel compositions for a variety of purposes, including reduced friction.Type: GrantFiled: October 11, 1983Date of Patent: May 6, 1986Assignee: Mobil Oil CorporationInventors: Andrew G. Horodysky, Joan M. Kaminski
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Patent number: 4584021Abstract: Corrosion inhibitor compositions comprising a mixture of nitroalkane containing 1-3 carbon atoms and an amine neutralized phosphate ester selected from the group consisting of 2-ethylhexylamine salt of mixed mono- and di-isooctyl acid phosphate, tertiary C.sub.12 alkyl primary amine salt of mixed mono- and di-isooctyl acid phosphate, diethylamine salt of mixed mono- and di-butoxyethyl acid phosphate and 2-ethylhexylamine salt of mixed mono- and di-tridecyl acid phosphate. Such compositions are useful in inhibiting corrosion on the interior surfaces of tin-plated aerosol cans containing water-based aerosol formulations.Type: GrantFiled: December 7, 1984Date of Patent: April 22, 1986Assignee: E. I. Du Pont de Nemours and CompanyInventor: Philip L. Bartlett
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Patent number: 4584175Abstract: There is disclosed a method for the inhibiting of corrosion of a variety of metals by placing the metal in the presence of a plastic sheet carrier having incorporated therein effective amounts of corrosion inhibitors which include; (a) certain hydroxyalkyl fatty amines, and (b) certain fatty imidazolinium quaternary compounds. The aforementioned compounds provide remarkable corrosion protection for ferrous metals. There can be also included in the plastic certain benzotriazoles or tolyltriazoles when it is desired to extend the protection to copper and copper base alloys, and to aluminum and aluminum base alloys. When protection is also desired for magnesium and magnesium alloys with other metals such as aluminum, there can also be included in the plastic sheet carrier an organic phosphate adduct with diethyl amine. In the preferred embodiment, the metal objects to be protected are sealed in an envelope formed of the plastic sheet material.Type: GrantFiled: May 14, 1984Date of Patent: April 22, 1986Inventor: Irvin W. Martenson
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Patent number: 4581040Abstract: Gasoline of reduced combustion chamber deposit attained by addition of, as additive, a reaction product of polyoxyisopropylenediamine-polyalkylene polyamine-maleic anhydride.Type: GrantFiled: September 12, 1985Date of Patent: April 8, 1986Assignee: Texaco Inc.Inventors: Rodney L. Sung, Robert H. Jenkins, Jr.
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Patent number: 4581151Abstract: A fuel composition is disclosed containing 30 to 10,000 ppm of an additive comprising quaternized polyoxyalkylene amine salts of molecular weight 500 to about 2500, the polyoxyalkylene moiety comprising 1 to 30 oxyalkylene units, the units having 2 to 4 carbon atoms and the amine comprising 1 to 12 amine nitrogen atoms and 2 to 40 carbon atoms and having a connecting moiety linking the polyoxyalkylene moiety to the amine moiety. Also disclosed are lubricating oil compositions containing the additive, concentrates of this additive and the composition of the additive itself.Type: GrantFiled: May 24, 1985Date of Patent: April 8, 1986Assignee: Chevron Research CompanyInventor: Curtis B. Campbell
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Patent number: 4564372Abstract: A fuel composition is disclosed containing 30 to 10,000 ppm of an additive comprising quaternized polyoxyalkylene amine salts of molecular weight 500 to about 2500, the polyoxyalkylene moiety comprising 1 to 30 oxyalkylene units, the units having 2 to 4 carbon atoms and the amine comprising 1 to 12 amine nitrogen atoms and 2 to 40 carbon atoms and having a connecting moiety linking the polyoxyalkylene moiety to the amine moiety. Also disclosed are lubricating oil compositions containing the additive, concentrates of this additive and the composition of the additive itself.Type: GrantFiled: July 20, 1984Date of Patent: January 14, 1986Assignee: Chevron Research CompanyInventor: Curtis B. Campbell
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Patent number: 4560497Abstract: Corrosion inhibiting amino ester and amino amide-ester compositions which are readily soluble or dispersible in water are provided. The anti-corrosive agents of this invention are obtained by reacting a maleinized polymeric fatty acid, a poly(oxyalkylene) glycol or alkoxypoly(oxyalkylene) glycol and nitrogen-containing compound so that at least 50 percent of the total available carboxyl functionality of the maleinized polymeric fatty acid is reacted.Type: GrantFiled: May 21, 1984Date of Patent: December 24, 1985Assignee: National Distillers and Chemical CorporationInventors: Donald D. Staker, William S. Kain
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Patent number: 4559163Abstract: This invention relates to non-halogen salts of nitrogen and/or nitrogen-sulfur heterocyclics as corrosion inhibitors for stainless steel-containing systems. These are more effective as corrosion inhibitors when employed in combination with surfactants, preferably of the non-ionic type such as oxyalkylates.Type: GrantFiled: March 12, 1984Date of Patent: December 17, 1985Assignee: Petrolite CorporationInventor: Patrick M. Quinlan
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Patent number: 4552686Abstract: A composition which is noncorroding to metals in contact therewith includes water, an alkylene glycol and/or a polyoxyalkylene glycol, a polyoxyalkylene amine and substantially no inorganic nitrite. The polyoxyalkylene amine replaces the previously used inorganic nitrite to reduce the toxicity of the noncorroding composition.Type: GrantFiled: April 9, 1984Date of Patent: November 12, 1985Assignee: Texaco Inc.Inventors: Betty J. Morris-Sherwood, Edward C. Brink, Jr.
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Patent number: 4549882Abstract: Corrosion caused by gasohol or alcohol motor fuels is inhibited by the addition of a corrosion inhibiting amount of the combination of (A) at least one monoalkenylsuccinic acid wherein the alkenyl group contains about 8 to 30 carbon atoms and (B) an N-(2-hydroxyalkyl)monoalkanolamine or an N-(2-hydroxyalkyl)dialkanolamine.Type: GrantFiled: October 19, 1984Date of Patent: October 29, 1985Assignee: Ethyl CorporationInventor: Gordon G. Knapp
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Patent number: 4549968Abstract: Stable oxygen scavenger compositions adapted for storage without resulting in substantial sludge formation and oxygen scavenging methods of using the compositions are disclosed. The compositions comprise hydroquinone, a compatible amine termed a mu-amine, and a member selected from the group consisting of isoascorbic acid and ascorbic acid and water soluble salt forms thereof. Methods comprise adding from about 0.05-200 ppm hydroquinone, 0.001-400 ppm mu-amine, and about 0.00025-500 ppm of isoascorbic or ascorbic acid to the desired aqueous medium.Type: GrantFiled: May 18, 1984Date of Patent: October 29, 1985Assignee: Betz Laboratories, Inc.Inventor: John A. Muccitelli
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Patent number: 4545925Abstract: An improved corrosion inhibited, freeze protected, heat transfer fluid or antifreeze composition which is comprised of at least about 0.25 weight percent phosphate as PO.sub.4, greater than 0.025 weight percent nitrite as NO.sub.2, and the balance a polyhydroxy alcohol; with the proviso that nitrate not be present in the heat transfer fluid. When the heat transfer fluid is to be used as an antifreeze composition for internal combustion engines, it can also contain a corrosion inhibitor selected from the group consisting of 2-mercaptobenzotriazole, tolyltriazole, benzotriazole, and alkali metal salts thereof and a buffering agent.Type: GrantFiled: May 7, 1984Date of Patent: October 8, 1985Assignee: Norchem, Inc.Inventors: Sidney F. Bosen, Bruce D. Perlson
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Patent number: 4541932Abstract: Compositions and methods for chemically scavenging oxygen from an aqueous medium are disclosed. Furfural catalyzed by hydroquinone can be used as an oxygen scavenger in any aqueous medium, but is especially well adapted for use in boiler water systems.Type: GrantFiled: November 9, 1984Date of Patent: September 17, 1985Assignee: Betz Laboratories, Inc.Inventor: John A. Muccitelli
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Patent number: 4536307Abstract: Borated acyl sarcosines have been found to be effective multifunctional additives when added to lubricating oils or greases therefrom. They can be used as antirust, antifriction or anticorrosion agents.Type: GrantFiled: September 23, 1983Date of Patent: August 20, 1985Assignee: Mobil Oil CorporationInventor: Andrew G. Horodysky
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Patent number: 4536189Abstract: An anti-corrosion additive composition for motor fuels containing a minor amount (i.e., from 1 to 10%) of a short chain aliphatic alcohol that is prepared by reacting substantially equal molar amounts of maleic anhydride and a hydrocarbon-substituted mono primary amine or hydrocarbon-substituted mono primary ether amine to produce a maleamic acid intermediate reaction product followed by (b) reacting said intermediate product of (a) with a substantially equal molar amount of a heterocyclic selected from the group consisting of 5-amino-1,3,4-thiadiazole-2-thiol or benzotriazole, said hydrocarbon-substituted mono primary amine being represented by the formula:R--NH.sub.Type: GrantFiled: April 27, 1984Date of Patent: August 20, 1985Assignee: Texaco Inc.Inventor: Rodney L. Sung
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Patent number: 4533481Abstract: Inhibitors useful in preventing the corrosion of metal surfaces that contact aqueous systems containing them are disclosed. The inhibitors comprise mixtures of monoamine salts of polycarboxylic acids and boric acid. Typical corrosion inhibitors are made from acids such as dodecanedioic, sebacic and azelaic acid, monoamines such as mono-, di- and triethanol amines and boric acid.Type: GrantFiled: April 20, 1983Date of Patent: August 6, 1985Assignee: The Lubrizol CorporationInventor: Richard W. Jahnke
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Patent number: 4531948Abstract: Corrosion caused by gasohol or alcohol motor fuels is inhibited by the addition of a corrosion inhibiting amount of the combination of (A) at least one monoalkenylsuccinic acid wherein the alkenyl group contains about 8 to 30 carbon atoms and (B) a polyisobutenyl succinimide of an alkylenepolyamine.Type: GrantFiled: June 13, 1984Date of Patent: July 30, 1985Assignee: Ethyl CorporationInventor: Gordon G. Knapp
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Patent number: 4525296Abstract: This invention relates to non-halogen salts of nitrogen and/or nitrogen-sulfur heterocyclics as corrosion inhibitors for stainless steel-containing systems. These are more effective as corrosion inhibitors when employed in combination with surfactants, preferably of the non-ionic type such as oxyalkylates.Type: GrantFiled: October 27, 1980Date of Patent: June 25, 1985Assignee: Petrolite CorporationInventor: Patrick M. Quinlan
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Patent number: 4522785Abstract: This invention involves a process for minimizing corrosion of metals in contact with aqueous acid solutions wherein said process comprises adding to the aqueous acid solution a corrosion inhibiting amount of a dialkylaminomethyl aromatic triazole having the structure: ##STR1## wherein R.sub.1 is from 1 to 4 substituents and is hydrogen, aliphatic of 1 to about 12 carbons, alkoxy of 2 to about 10 carbons, aroxy of 2 to about 10 carbons, or --COOR.sub.4 wherein R.sub.4 is aliphatic of 1 to about 12 carbons; and R.sub.2 and R.sub.3 are the same or different and are alkyl of 1 to about 4 carbons.Type: GrantFiled: November 4, 1982Date of Patent: June 11, 1985Assignee: The Sherwin-Williams CompanyInventor: Michael J. D'Errico
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Patent number: 4518519Abstract: An improved, highly penetrating rust remover and/or degreaser composition for metallic surfaces is provided which is chemically inhibited to substantially prevent oxidation-reduction reactions with a metal substrate and limit the action of the composition to a chemical attack on corrosion. The composition is preferably a single phase dispersion and includes respective quantities of an acid such as hydrochloric acid and phosphoric acid, an organic compound containing a nitrogen, oxygen or sulfur atom such as N-(2-hydroxyethyl) oxazolidine, an alcohol or other organic solvent for grease removal, water and one or more emulsifiers (e.g., a derivative of hydrogenated tallow) for stabilizing and lowering the surface tension of the resultant composition.Type: GrantFiled: July 22, 1983Date of Patent: May 21, 1985Inventors: Peter F. Lott, Reiner E. Jargosch
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Patent number: 4517028Abstract: A metal surface is treated by contacting the surface with a solution comprising an effective amount of a soluble or dispersible treatment compound selected from the group consisting of a polymer having the following general formula, acid salts thereof, and mixtures thereof: ##STR1## where: R.sub.1 through R.sub.3 are hydrogen or an alkyl group having from 1 to about 5 carbon atoms;each Y is hydrogen, Z, CR.sub.4 R.sub.5 OR.sub.6, CH.sub.2 Cl, or an alkyl or aryl group having from 1 to 18 carbon atoms;Z is ##STR2## R.sub.4 through R.sub.10 are hydrogen, or an alkyl, aryl, hydroxy-alkyl, amino-alkyl, mercapto-alkyl or phospho-alkyl moiety, said R.sub.4 through R.sub.10 being of carbon chain lengths up to a length at which the compound is not soluble or dispersible; andn is from 2 up to a number at which the polymer is not soluble or dispersible.Preferably, the solution is an aqueous solution and "Z" moieties are present in sufficient amount that the compound is water soluble or water dispersible.Type: GrantFiled: May 9, 1983Date of Patent: May 14, 1985Assignee: Parker Chemical CompanyInventor: Andreas Lindert
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Patent number: 4514320Abstract: This invention relates to non-halogen salts of nitrogen and/or nitrogen-sulfur heterocyclics as corrosion inhibitors for stainless steel-containing systems. These are more effective as corrosion inhibitors when employed in combination with surfactants, preferably of the non-ionic type such as oxyalkylates.Type: GrantFiled: March 12, 1984Date of Patent: April 30, 1985Assignee: Petrolite CorporationInventor: Patrick M. Quinlan
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Patent number: 4512552Abstract: A corrosion inhibitor for ferrous metals comprising four different components of (a) an inorganic acid component (such as molybdate or tungstate), (b) an aliphatic hydroxycarboxylic or aliphatic dicarboxylic acid or its salt (such as citric acid, gluconic acid or succinic acid), (c) an inorganic heavy metal compound (such as zinc chloride or stannous chloride) and (d) a water soluble polymer component having a molecular weight of 500-100,000 (such as acylic homo or copolymer), which is especially advantageous for use in water recycling system.Type: GrantFiled: November 16, 1982Date of Patent: April 23, 1985Assignee: Katayama Chemical Works Co., Ltd.Inventors: Sakae Katayama, Tadahiko Asano, Kazuo Marugame, Sadaoki Kanada, Yoshinari Kawasaki
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Patent number: 4512909Abstract: Disclosed is an improved oxygen-scavenging and corrosion-inhibiting agent for fluidic systems comprising a hydroquinone compound with hydrazine (1:1 molar ratio). Also disclosed are methods for using this agent.Type: GrantFiled: June 30, 1982Date of Patent: April 23, 1985Assignee: Olin CorporationInventor: Henry W. Schiessl