Sulphur Organic Compound Containing Patents (Class 252/391)
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Patent number: 4798683Abstract: A method for inhibiting corrosion in aqueous systems comprising adding to the system being treated an effective amount of a composition comprising a molybdate ion source and a water-soluble component selected from polymaleic acid anhydride, amine adducts of polymaleic anhydride, maleic anhydride copolymers, carboxylic acid/sulfonic acid polymers, salts of the above-described polymers, phosphonates, phosphino carboxylic acids, polyphosphoric acid and esters of polyphosphoric acid.Type: GrantFiled: April 21, 1988Date of Patent: January 17, 1989Assignee: Calgon CorporationInventors: Bennett P. Boffardi, Susan P. Rey
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Patent number: 4789523Abstract: Lignin amines are disclosed which are characterized by high nitrogen content and are water soluble at both alkaline and acidic pH values. The lignin amines have utility as flocculants, filtration aids, precipitants, scale inhibitors, asphalt emulsifiers, fluid loss additives, oil well cement additives, corrosion inhibitors, retention aids, cationic dispersants, and tall oil pitch emulsifiers.Type: GrantFiled: March 28, 1988Date of Patent: December 6, 1988Assignee: Westvaco CorporationInventors: Peter Schilling, Patti E. Brown
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Patent number: 4780278Abstract: A hydrocarbon-soluble corrosion inhibitor composition comprising the reaction product obtained by the acid-catalyzed oligomerization of an alkylaniline and formaldehyde, wherein the alkylaniline has from 4 to 30 carbon atoms in the alkyl substituent. Also disclosed is a method of inhibiting corrosion of a corrodible metal utilizing said composition.Type: GrantFiled: October 31, 1986Date of Patent: October 25, 1988Assignee: Chevron Research CompanyInventors: Robert Bacskai, Albert H. Schroeder
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Patent number: 4778728Abstract: Compositions comprising an amine-reactive vinyl polymer and a polyfunctional amine crosslinker when combined with a benzotriazole or a polypyridyl, alone, or in further combination with 2-hydroxypyridine cure into coatings having superior corrosion resistance.Type: GrantFiled: October 8, 1987Date of Patent: October 18, 1988Assignee: American Cyanamid CompanyInventor: Howard R. Lucas
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Patent number: 4751051Abstract: The uses of .alpha.-aminoalkyl sulfur compositions and to the preparation thereof, particularly as corrosion inhibitors. These compositions contain a moiety of the general formula ##STR1## in a linear or cyclic configuration.Type: GrantFiled: May 18, 1984Date of Patent: June 14, 1988Assignee: Petrolite CorporationInventors: Neil E. S. Thompson, Derek Redmore, Bernardus A. O. Alink
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Patent number: 4734203Abstract: This invention discloses a method of improving the constitution of boiler water by adding thereto an effective amount of a copper transport agent which is either rubeanic acid or a low molecular weight polymer of polypiperazine methyl-para-hydroxysulfonic acid or polypiperazine methyl-para-hydroxybenzoic acid. The copper transport agent satisfactorily separates the copper from iron, calcium, magnesium and other heavy metals with a high degree of selectivity. The chelant may be added in a ratio of 100/1 to 10/1 chelant/copper and an advantageous ratio in the case of the polymer is 50/1 ppm active polymer to 1 ppm Cu. The chelants, which form a soluble chelate with Cu, is capable of removing Cu through boiler blowdown in an operating, layup or cleanup boiler. This adds an anti-corrosion factor to the galvanized boiler corrosion.Type: GrantFiled: March 3, 1987Date of Patent: March 29, 1988Assignee: Nalco Chemical CompanyInventors: Mei-Jan L. Lin, Frederick J. Sibert
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Patent number: 4734259Abstract: A composition and method for inhibiting the attack of aqueous corrosive fluids on metal by contacting the metal with a composition including an .alpha.,.beta.-unsaturated aldehyde and a surfactant.Type: GrantFiled: November 22, 1985Date of Patent: March 29, 1988Assignee: Dowell Schlumberger IncorporatedInventors: Wayne W. Frenier, Frederick B. Growcock
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Patent number: 4719036Abstract: New anticorrosive compositions comprise:(A) an applicational medium selected from (a) surface coatings and (b) wholly or partly aqueous non-coating media,(B) as corrosion inhibitor, an amide, imide or nitrile of an aliphatic- or cycloaliphatic mono-, di-, tri- or tetra-carboxylic acid which is substituted in the aliphatic- or cycloaliphatic residue by one or more groups having the formula: ##STR1## in which X is oxygen, sulphur or NH; and each R, independently, is hydrogen, alkyl, haloalkyl, alkoxy, alkylthio, alkylsulphonyl, cycloalkyl, phenyl, alkylphenyl, phenylalkyl, halogen, cyano, nitro, hydroxy, --COOH, --COOalkyl or a primary-, secondary- or tertiary amino- or carbamoyl group; or a non-toxic base addition salts of those components (B) which contain free carboxyl groups.Type: GrantFiled: May 8, 1985Date of Patent: January 12, 1988Assignee: Ciba-Geigy CorporationInventors: Brian G. Clubley, Emyr Phillips
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Patent number: 4717543Abstract: The present invention is directed to a method of inhibiting the corrosion of copper and copper alloys in an aqueous system containing oxygen using an effective amount of a polymer prepared from:(A) about 30 to about 70%, by weight, of acrylic acid or methacrylic acid;(B) about 30 to about 70%, by weight, of 2-acrylamido-2-methylpropylsulfonic acid or 2-methacrylamido-2-methylpropylsulfonic acid; and(C) about 15 to about 25%, by weight, of 2-acrylamido-2-methylpropylphosphonic acid or 2-methacrylamido-2-methylpropylphosphonic acid, acrylamide or methacrylamide; wherein the polymer has an intrinsic viscosity of from about 0.05 to about 4.5 dl/g, in 1.0 M NaCl.Type: GrantFiled: August 4, 1986Date of Patent: January 5, 1988Assignee: Calgon CorporationInventors: Nancy S. Sherwood, Nicholas J. Alfano
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Patent number: 4705642Abstract: A haze, oxidation, and corrosion resistant diesel engine lubricant composition, particularly useful in marine and railway diesel engines, contains 0.1-5.0 weight percent of a reaction product additive. The reaction product additive is produced by first reacting substantially equimolar amounts of an anhydride compound which is either a dibasic acid anhydride or isatoic anhydride and a hydrocarbon-substituted mono primary amine or ether amine at a temperature range of 50.degree. C.-150.degree. C. to produce an intermediate reaction product. The intermediate reaction product is thereafter further reacted at an elevated temperature with a substantially equimolar amount of a heterocyclic azole or polyalkylene polyamine compound to form the final reaction product.Type: GrantFiled: December 23, 1986Date of Patent: November 10, 1987Assignee: Texaco Inc.Inventors: Rodney L. Sung, Benjamin H. Zoleski, Ronald L. O'Rourke
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Patent number: 4696763Abstract: New anticorrosive compositions comprise:(A) an applicational medium selected from (a) surface coatings and (b) wholly or partly aqueous non-coating media,(B) as corrosion inhibitor, an effective corrosion-inhibiting amount of at least one aliphatic or cycloaliphatic mono-, di-, tri- or tetra-carboxylic acid ester or anhydride which is substituted in the aliphatic or cycloaliphatic residue by one or more groups having the formula ##STR1## in which X is oxygen, sulphur or NH; and each R, independently, is hydrogen, alkyl, haloalkyl, alkoxy, alkylthio, alkylsulphonyl, cycloalkyl, phenyl, alkylphenyl, phenylalkyl, halogen, cyano, nitro, hydroxy, --COOH, --COOalkyl or a primary-, secondary- or tertiary amino- or carbamoyl group; or a non-toxic base addition salts of those components (B) which contain free carboxyl group.Type: GrantFiled: May 3, 1985Date of Patent: September 29, 1987Assignee: CIBA-GEIGY CorporationInventors: Robert L. Bentley, William Hoyle, James Jack
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Patent number: 4684507Abstract: A process for inhibiting the corrosion of ferrous metals in aqueous acidic or briny media comprising the step of adding a composition of the formula ##STR1## where R.sub.1 is a hydrocarbon group, O is a pyridine or substituted pyridine, and X is an anion.Type: GrantFiled: October 29, 1982Date of Patent: August 4, 1987Assignee: Petrolite CorporationInventors: Neil E. S. Thompson, Derek Redmore, Bernardus A. Oude Alink, Benjamin T. Outlaw
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Patent number: 4675158Abstract: The present invention is directed to a composition which is useful for inhibiting the corrosion of copper and copper alloy metals in contact with an aqueous system which comprises mercaptobenzothiazole and tolyltriazole.The present invention is also directed to a method of inhibiting the corrosion of copper and copper alloy metals in contact with an aqueous system comprising maintaining in the aqueous system at least about 0.1 ppm (parts per million) of a composition comprising mercaptobenzothiazole and tolyltriazole.Type: GrantFiled: July 30, 1985Date of Patent: June 23, 1987Assignee: Calgon CorporationInventor: William M. Klindera
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Patent number: 4673436Abstract: Corrosion inhibition is obtained by treating a system containing corrosion susceptible metal with a corrosion inhibiting amount, preferably 1 to 10,000 ppm of a thio substituted quaternary ammonium salt, preferably of the general structure: ##STR1## wherein R.sub.1 is preferably H or an alkyl group of 8 to 18 carbon atoms, n is 2 or 3, R.sub.2, R.sub.3 and R.sub.4 are preferably alkyl groups of 1 to 18 carbon atoms and two of R.sub.2, R.sub.3 and R.sub.4 are methyl.Type: GrantFiled: April 22, 1986Date of Patent: June 16, 1987Assignee: Exxon Chemical Patents Inc.Inventors: John A. Haslegrave, Daniel S. Sullivan
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Patent number: 4668474Abstract: The present invention is directed to a composition and method for inhibiting the corrosion of copper and copper alloy metals in aqueous systems. The composition comprises mercaptobenzothiazole and added ferrous ions in a ratio of 1:1 to 1:10, by weight. The method comprises adding this composition to the aqueous system being treated.Type: GrantFiled: July 22, 1985Date of Patent: May 26, 1987Assignee: Calgon CorporationInventors: Jasbir S. Gill, Richard G. Varsanik
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Patent number: 4655287Abstract: A composition is provided which, when applied to a metal surface, forms a corrosion-inhibiting film thereon. The composition comprises the reaction product of a first component selected from an epoxy resin, an epoxidized alkene and a substrate having at least one displaceable halogen, and a second component comprising a monomercaptan in a hydrocarbon diluent. The composition is applied by contacting the metal surface with the composition. The composition is particularly useful in the treatment of down-well metal surfaces in oil and gas wells to inhibit the corrosion of the metal under highly corrosive conditions, and is effective even in the presence of polymeric permeability control agents such as aqueous polyacrylamides.Type: GrantFiled: January 6, 1986Date of Patent: April 7, 1987Assignee: Phillips Petroleum CompanyInventor: Yulin Wu
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Patent number: 4647392Abstract: A corrosion inhibitor for use in water and liquid alcohol antifreeze/coolant compositions comprising the combination of a C.sub.5 -C.sub.16 aliphatic monobasic acid or the alkali metal, ammonium, or amine salt of said acid, a C.sub.5 -C.sub.16 hydrocarbyl dibasic acid or the alkali metal, ammonium, or amine salt of said acid, and a hydrocarbyl triazole gives synergistic corrosion protection to metal surfaces as compared with formulations containing either the monoacid or diacid component alone, or formulations containing other conventional corrosion inhibitors.Type: GrantFiled: December 27, 1985Date of Patent: March 3, 1987Assignees: Texaco Inc., S. A. Texaco Belgium N.V.Inventors: Jerome W. Darden, Carol A. Triebel, Walter A. Van Neste, Jean P. Maes
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Patent number: 4637899Abstract: A corrosion inhibitor composition comprising:(1) at least one of an aliphatic pyridinium salt or an aliphatic quinolinium salt; and(2) a sulfur-containing compound. The compositions are useful in inhibiting the corrosion of metals during the cleaning of process equipment using industrial aqueous cleaning solutions.Type: GrantFiled: January 30, 1984Date of Patent: January 20, 1987Assignee: Dowell Schlumberger IncorporatedInventor: Weldon C. Kennedy, Jr.
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Patent number: 4636359Abstract: A method of inhibiting zinc corrosion in aqueous systems comprising adding an effective amount of a bis(aminotriazole) or a bis(mercaptotriazole), whose bridge may be substituted by a C.sub.0-10 -alkyl.Type: GrantFiled: October 16, 1984Date of Patent: January 13, 1987Assignee: Henkel Kommanditgesellschaft auf AktienInventor: Josef Penninger
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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: 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: 4618539Abstract: Corrosion-inhibiting compositions are described which comprise a mixture of(A) at least one oil-soluble neutral or basic alkali metal or alkaline earth metal salt or complex of at least one organic acid, and(B) a nitrogen- and boron-containing composition which is the reaction product of at least one amino alcohol, at least one of a boric acid or boron trioxide, and at least one organic carboxylic acid. Such compositions exhibit improved corrosion-inhibiting properties, especially when included in preservative oil applications. In a preferred embodiment, the composition of the invention contains, in addition to the nitrogen- and boron-containing compositions, a mixture of calcium and barium salts of one or more organic sulfonic acids.Oil compositions containing the above-described corrosion-inhibiting compositions also are described. The disclosure also describes methods for inhibiting the corrosion of metal surfaces and metal articles which have been coated in accordance with the method of the invention.Type: GrantFiled: December 6, 1984Date of Patent: October 21, 1986Assignee: The Lubrizol CorporationInventors: Richard W. Jahnke, William C. Woerner
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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: 4613481Abstract: The present invention is directed to a composition useful for inhibiting the corrosion of copper and copper alloy metals in an aqueous system comprising mercaptothiazoline and ferrous ions.The present invention is also directed to a method of inhibiting the corrosion of copper and copper alloy metals in an aqueous system comprising maintaining in the aqueous system at least about 1 ppm (parts per million) of mercaptothiazoline, preferably in combination with ferrous ions.Type: GrantFiled: August 16, 1985Date of Patent: September 23, 1986Assignee: Calgon CorporationInventors: Jasbir S. Gill, Arthur J. Friedman
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Patent number: 4612049Abstract: A corrosion-inhibiting coating composition containing(a) a film-former and(b) as the corrosion inhibitor, an effective amount of an aliphatic or cycloaliphatic mono-, di-, tri- or tetra- carboxylic acid which is substituted in its aliphatic or cycloaliphatic radical by at least one group of the formula I ##STR1## in which X is oxygen, sulfur or NH and each R independently of the others is hydrogen, alkyl, halogenoalkyl, alkoxy, alkylthio, alkylsulfonyl, cycloalkyl, phenyl, alkylphenyl, phenylalkyl, halogen, --CN, --NO.sub.2, --COOH, --COOalkyl, --OH or a primary, secondary or tertiary amino or carbamoyl group, R not being --NH.sub.2 in the case of a monocarboxylic acid in which X is sulfur, and also base addition salts of these compounds are useful as corrosion inhibitors.Type: GrantFiled: April 25, 1985Date of Patent: September 16, 1986Assignee: Ciba-Geigy CorporationInventors: Godwin Berner, William Hoyle, James Jack
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Patent number: 4608191Abstract: A composition is provided which, when applied to a metal surface, forms a corrosion-inhibiting film thereon. The composition comprises the reaction product of a first component selected from an epoxy resin, an epoxidized alkene and a substrate having at least one displaceable halogen, and a second component comprising a monomercaptan in a hydrocarbon diluent. The composition is applied by contacting the metal surface with the composition. The composition is particularly useful in the treatment of down-well metal surfaces in oil and gas wells to inhibit the corrosion of the metal under highly corrosive conditions, and is effective even in the presence of polymeric permeability control agents such as aqueous polyacrylamides.Type: GrantFiled: October 1, 1984Date of Patent: August 26, 1986Assignee: Phillips Petroleum CompanyInventor: Yulin Wu
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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: 4596849Abstract: This invention relates to a corrosion inhibiting composition for ferrous metals and its alloys in gas conditioning service using aqueous monoethanolamine to scrub carbon dioxide containing oxygen. The corrosion inhibiting composition includes a thiourea-amine-formaldehyde based polymer and, in the preferred embodiment, also includes a cupric ion producing material.Type: GrantFiled: October 29, 1984Date of Patent: June 24, 1986Assignee: The Dow Chemical CompanyInventors: Edwin R. Henson, Joel G. Courtwright, Tipton T. Masterson
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Patent number: 4595723Abstract: This invention relates to a corrosion inhibiting composition for ferrous metals and its alloys in gas conditioning service using aqueous monoethanolamine to scrub carbon dioxide. The corrosion inhibiting composition includes a thiourea-amine-formaldehyde based polymer and, in the preferred embodiment, also includes a nickel ion producing material.Type: GrantFiled: October 29, 1984Date of Patent: June 17, 1986Assignee: The Dow Chemical CompanyInventors: Edwin R. Henson, Tipton T. Masterson, Joel G. Courtwright
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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: 4578243Abstract: This invention relates to compositions of the formula ##STR1## where R is a hydrocarbon, A is alkylene, and Z is S, SO, SO.sub.2, and salts thereof. This invention also relates to uses thereof, for example as microbiocidal agents, corrosion inhibitors, etc.Type: GrantFiled: May 28, 1985Date of Patent: March 25, 1986Assignee: Petrolite CorporationInventor: Patrick M. Quinlan
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Patent number: 4568753Abstract: Improved rust-preventive compounds are provided which are strongly effective with both iron and copper metals. The compound of the invention comprise benzothiazole-substituted carboxylic acids, and their salts. Suitable salts may include alkali metal, alkaline earth metal, ammonium and substituted ammonium salts.Type: GrantFiled: November 18, 1983Date of Patent: February 4, 1986Assignee: Sanshin Kagaku Kogyo Co., Ltd.Inventors: Sumio Akashi, Katsushige Koge
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Patent number: 4564465Abstract: A method and composition for corrosion protection of metal components of a fluid circulation system utilizing a buffered solution containing perchlorate ion and specific operative additives.Type: GrantFiled: April 20, 1983Date of Patent: January 14, 1986Assignee: Air Refiner, Inc.Inventor: John W. Bibber
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Patent number: 4561897Abstract: The instant invention is directed to an aqueous stable magnesium hydroxide suspension which is dispersible in oil, comprising a mixture of:(a) a 33 to 60, preferably 50 to 60, percent, by weight, aqueous slurry or paste of magnesium hydroxide; and(b) an alkyl benzene sulfonate emulsifier.The instant invention is also directed to a process for the preparation of an aqueous stable magnesium hydroxide suspension which is dispersible in oil, comprising mixing:(a) a 33 to 60, preferably 50 to 60, percent, by weight, aqueous slurry of magnesium hydroxide; and(b) an alkyl benzene sulfonate emulsifier.The instant invention is also directed to a process for inhibiting corrosion in fuel burning boilers comprising adding to the fuel a corrosion inhibiting amount of an aqueous stable magnesium hydroxide suspension which is dispersible in oil, comprising a mixture of:(a) a 33 to 60 percent, by weight, aqueous slurry or paste of magnesium hydroxide; and(b) an alkyl benzene sulfonate emulsifier.Type: GrantFiled: August 16, 1984Date of Patent: December 31, 1985Assignee: Calgon CorporationInventors: John D. Zupanovich, John G. Myers
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Patent number: 4557838Abstract: Metal corrosion by aqueous acid solutions is inhibited by admixture therein of a synergistic additive consisting essentially of:(1) a heterocyclic nitrogen compound or alkylamine,(2) an acetylenic alcohol, and(3) a dialkylthiourea.In certain instances good inhibition against metal corrosion is obtained without the inclusion of the dialkylthiourea in the additive composition.Type: GrantFiled: September 24, 1984Date of Patent: December 10, 1985Assignee: Air Products and Chemicals, Inc.Inventors: James D. Nichols, Richard Derby, Glenn T. von dem Bussche, David A. Hannum
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Patent number: 4556110Abstract: A corrosion-inhibiting composition of matter comprising (1) the reaction mass resulting from the reaction of an .alpha.,.beta.-unsaturated hydrocarbyl nitrile and a metal hydrocarbyl sulfonate, (2) an alcohol, (3) a hydrocarbon diluent, and optionally (4) an epoxy resin. The composition is particularly useful in the treatment of downhole metal surfaces in oil and gas wells for inhibiting the corrosion of the metal.Type: GrantFiled: August 30, 1984Date of Patent: December 3, 1985Assignee: Phillips Petroleum CompanyInventor: Yulin Wu
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Patent number: 4554310Abstract: Room temperature vulcanizable organopolysiloxane compositions are provided which exhibit improved stability and a reduced tendency to corrode copper upon contact resulting from the employment of an effective amount of a tin condensation catalyst having organo radicals attached to tin by carbon tin linkages and whose remaining valences are satisfied by a chelate radical or a dicarboxylate radical in combination with an organic triazole such as benzotriazole.Type: GrantFiled: August 27, 1984Date of Patent: November 19, 1985Assignee: General Electric CompanyInventors: Jeffrey H. Wengrovius, Leonard W. Niedrach
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Patent number: 4539140Abstract: 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: September 3, 1985Assignee: Petrolite CorporationInventor: Patrick M. Quinlan
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Patent number: 4536292Abstract: 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, prepared from:(a) 50 to 90%, by weight, of an unsaturated carboxylic acid, or its salt;(b) 5 to 40%, by weight, of an unsaturated sulfonic acid, or its salt; and(c) 5 to 40%, by weight, of an unsaturated quaternary ammonium compound.The instant invention is also directed to a water soluble polymer, having an intrinsic viscosity of 0.05 to 2.Type: GrantFiled: March 26, 1984Date of Patent: August 20, 1985Assignee: Calgon CorporationInventor: Gary F. Matz
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Patent number: 4536302Abstract: A method and composition for reducing the corrosion effect of aqueous mediums such as brines on ferrous metals by incorporating in the brine an effective amount of a mixture of a sulfur compound wherein the oxidation state of the sulfur is zero or less and a reducing sugar.Type: GrantFiled: June 30, 1983Date of Patent: August 20, 1985Inventors: John J. Augsburger, R. Keith Darlington
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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: 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: 4495200Abstract: A process for the control of planktonic sulfate-reducing bacteria in industrial process water systems which comprises the step of treating said system with a dithiocarbamate of the formula: ##STR1## wherein R is a C.sub.1 to C.sub.4 alkyl radical, R.sup.1 is either a methylene or ethylene radical, n is 0, 1, 2, or 3 and X is a Group IA alkali metal.Type: GrantFiled: October 6, 1983Date of Patent: January 22, 1985Assignee: Phillips Petroleum CompanyInventors: Merlin R. Lindstrom, Leslie J. Henshaw, Harold W. Mark, James B. Clark
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Patent number: 4469622Abstract: Disclosed is an imidazole-4(5)-dithiocarboxylic acid compound represented by the following general formula: ##STR1## wherein R.sub.2 stands for a hydrogen atom or a monovalent hydrocarbon group having up to 20 carbons, R.sub.4 stands for a hydrogen atom or an alkyl group having up to 4 carbon atoms, and X stands for a hydrogen atom or an alkali metal atom.This compound has an excellent rust preventive action to silver. This compound is prepared according to a process which comprises reacting an imidazole compound represented by the following general formula: ##STR2## wherein R.sub.2 and R.sub.4 are as defined above, with carbon disulfides and an alkali metal hydroxide in the presence of a solvent, and if necessary, acidifying the obtained imidazole compound.Type: GrantFiled: January 24, 1983Date of Patent: September 4, 1984Assignee: Shikoku Chemicals CorporationInventors: Natsuo Sawa, Tokuichi Saeki
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Patent number: 4466902Abstract: A rust inhibitor comprising, as an effective component, at least one compound having the following general formulae (A), (B) and (C) ##STR1## wherein R.sub.1 and R.sub.2 are independently a hydrocarbon group having 1 to 6 carbon atoms, R.sub.3 and R.sub.4 are independently a hydrocarbon group having 1 to 4 carbon atoms or a hydrocarbon group containing an aromatic ring and having 6 to 12 carbon atoms, R.sub.5 and R.sub.6 are independently a hydrocarbon group having 1 to 18 carbon atoms, m and n are independently 0 or an integer of 1 to 3, R.sub.3 or R.sub.4 is hydrogen in the case of m or n is 0, X is O, S, SO.sub.2, CO or a hydrocarbon group having 1 to 9 ca toxicity and is easily applicable in either a water-soluble state or an oil-soluble state.Type: GrantFiled: September 30, 1982Date of Patent: August 21, 1984Assignee: Ipposha Oil Industries, Co., Ltd.Inventors: Shinichi Kumagae, Tatsuo Manabe
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Patent number: 4450102Abstract: Novel compositions are provided for the cleaning and inhibiting corrosion of metallic surfaces. The cleaning composition has an active ingredient consisting of at least one sulfur containing compound selected from the group consisting of a bis(N-2 pyrrolidonyl), an (N-2 pyrrolidonyl), or a bis(N-succinimidyl) sulfur-containing compound.Type: GrantFiled: November 2, 1982Date of Patent: May 22, 1984Assignee: Phillips Petroleum CompanyInventors: Merlin R. Lindstrom, Gary D. Macdonell, Rector P. Louthan, Donald H. Kubicek
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Patent number: 4450138Abstract: This invention relates to the following:(1) An amino-containing composition characterized by polymercapto groups,(2) A polyamino-containing composition characterized by mercapto or polymercapto groups,(3) A composition characterized by the presence ofA. a mercapto or polymercapto groups, andB. a nitrogen-containing group characterized by at least one of the following:1. an amido or a polyamido group,2. a cyclic amidine or a polycyclic amidine group,3. an epihalohydrin-derived amino-containing group.This invention also relates to the use of the above compositions as corrosion inhibitors.Type: GrantFiled: October 29, 1982Date of Patent: May 22, 1984Assignee: Petrolite CorporationInventors: Neil E. S. Thompson, Derek Redmore, Bernardus A. Oude Alink, Benjamin T. Outlaw
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Patent number: 4450137Abstract: This invention relates to the following:(1) An amino-containing composition characterized by polymercapto groups,(2) A polyamino-containing composition characterized by mercapto or polymercapto groups,(3) A composition characterized by the presence ofA. a mercapto or polymercapto groups, andB. a nitrogen-containing group characterized by at least one of the following:1. an amido or a polyamido group,2. a cyclic amidine or a polycyclic amidine group,3. an epihalohydrin-derived amino-containing group.This invention also relates to the use of the above compositions as corrosion inhibitors.Type: GrantFiled: October 29, 1982Date of Patent: May 22, 1984Assignee: Petrolite CorporationInventors: Neil E. S. Thompson, Derek Redmore, Bernardus A. Oude Alink, Benjamin T. Outlaw
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Preparation of mixture of nitrogen and sulfur-nitrogen heterocyclics and use in corrosion inhibiting
Patent number: 4446056Abstract: A process of preparing sulfur-containing compositions which comprises reacting hexahydrotriazines, or the precursors thereof, with sulfur or sulfur-containing compounds. The products of the reaction are useful as corrosion inhibitors. Additionally, ketones or the reaction products of ketones and ammonia are reacted with sulfur or sulfur-containing compounds to yield corrosion inhibitors.Type: GrantFiled: December 10, 1979Date of Patent: May 1, 1984Assignee: Petrolite CorporationInventor: Neil E. S. Thompson -
Patent number: 4440655Abstract: Reaction products from thiodephenol, aldehydes and amines are effective friction reducing additives in lubricants.Type: GrantFiled: July 15, 1982Date of Patent: April 3, 1984Assignee: Mobil Oil CorporationInventors: Robert M. Gemmill, Jr., Andrew G. Horodysky