Patents Examined by Valerie Fee
-
Patent number: 5032318Abstract: A process is disclosed for inhibiting corrosion in tin-plated steel aerosol cans which contain aqueous aerosol formulations and a propellant. Compositions such as the isopropylamine, cyclohexylamine, 2-ethylhexylamine and tertiary C.sub.12-14 alkyl primary amine salts of N-acyl sarcosine; morpholine salts of oleic acid, acetic acid, benzoic acid, and N-acyl sarcosine; cyclohexylamine, 2-ethylhexylamine, tertiary C.sub.12-14 alkyl primary amine and tertiary C.sub.18-22 alkyl primary amine salts of benzoic acid are disclosed.Type: GrantFiled: September 18, 1989Date of Patent: July 16, 1991Assignee: E. I. Du Pont de Nemours and CompanyInventor: Philip L. Bartlett
-
Patent number: 5030385Abstract: A process is disclosed for inhibiting corrosion in tin-plated steel aerosol cans which contain aqueous aerosol formulations and a propellant. Compositions such as the isopropylamine, cyclohexylamine, 2-ethylhexylamine and tertiary C.sub.12-14 alkyl primary amine salts of N-acyl sarcosine; morpholine salts of oleic acid, acetic acid, benzoic acid, and N-acyl sarcosine; cyclohexylamine, 2-ethylhexylamine, tertiary C.sub.12-14 alkyl primary amine and tertiary C.sub.18-22 alkyl primary amine salts of benzoic acid are disclosed.Type: GrantFiled: September 18, 1989Date of Patent: July 9, 1991Assignee: E. I. Du Pont de Nemours and CompanyInventor: Philip L. Bartlett
-
Patent number: 5026503Abstract: An improved aqueous catalytic oxidation-reduction composition for oxidizing hydrogen sulfide to produce elemental sulfur and a method of removing hydrogen sulfide from a gas stream whereby a gas stream containing hydrogen sulfide is brought into contact with an aqueous catalytic oxidizing reaction composition containing a water soluble polyvalent metal salt having metal in the highest valence state and at least one nonionic surfactant having an HLB of from about 8 to about 10, preferably about 8.5 to about 9, which is adapted to wet the elemental sulfur formed. The nonionic surfactant is present in the reaction solution in an amount sufficient to substantially prevent formation of sulfur froth at the surface of the reaction solution and to cause the sulfur to precipitate as a granular solid that can be recovered by filtration, by centrifucation, or other similar means.Type: GrantFiled: July 21, 1989Date of Patent: June 25, 1991Assignee: Amoco CorporationInventor: Robert C. Stewart
-
Patent number: 5023017Abstract: A process of preparing an alkaline solution of Labiatae antioxidants essentially free of lipids by agitating a solvent extract of the herb with an aqueous alkaline lower-aliphatic alcoholic or polyol solution thereof, separating the aqueous phase from the insoluble phase, and removing the alcohol from the aqueous phase by distillation to give a stable product with an antioxidant strength of 0.2 or more, having a pH above about 8.4, and having less than 75% having, preferably in the presence of a water-immiscible solvent, and a stable aqueous antioxidant solution of a Labiatae extract, consisting essentially of essentially all of the antioxidant substances present in the herb, which is preferably rosemary, sage, or thyme, with an antioxidant strength of 0.2 or more, and less than about 75% water, preferably having a pH between about 8.4 and about 11.Type: GrantFiled: August 21, 1989Date of Patent: June 11, 1991Assignee: Kalamazoo Holdings, Inc.Inventor: Paul H. Todd, Jr.
-
Patent number: 5023016Abstract: A concentrate composition is disclosed which comprises (a) a blend of (i) a metal sulfonate and (ii) an alkali or alkaline earth metal or zinc salt of a carboxylic acid and (b) a carrier. The composition is useful as a rust- and corrosion-inhibitor in a petroleum or synthetic base medium and is capable of maintaining metal sulfonate content at temperatures greater than 150.degree. C., e.g., 200.degree. C., for 20 hours.Type: GrantFiled: November 22, 1989Date of Patent: June 11, 1991Assignee: King Industries, Inc.Inventors: Lawrence V. Gallacher, Alfen J. Gustavsen, Robert L. Kugel
-
Patent number: 5015412Abstract: Disclosed is an aqueous basic solution having a calculated pH of 13 or greater of a sulfobetaine which is soluble and stable for extended periods of storage. The sulfobetaine also is soluble and stable in aqueous basic solutions of high concentration, e.g. up to 30%-50% by weight sodium hydroxide or potassium hydroxide.Type: GrantFiled: December 18, 1989Date of Patent: May 14, 1991Assignee: Sherex Chemical Company, Inc.Inventor: William J. Zeman
-
Patent number: 5013483Abstract: A composition and method for inhibiting corrosion of iron and steel in the presence of aqueous acid, especially concentrated hydrochloric acid comprising at least 5% by weight HCl, comprising an effective corrosion inhibiting amount of an alkenylphenone having the following structure: ##STR1## wherein R.sub.1 may be unsubstituted or inertly substituted aryl of 6 to about 10 carbons, and R.sub.2 and R.sub.3 may be the same or different and each may be hydrogen, halogen, or inertly substituted aliphatic of about 3 to about 12 carbons, and R.sub.2 may also be alkanol, ether, or unsubstituted or inertly substituted aryl of 6 to about 10 carbons, provided that the total number of carbons in said alkenylphenone does not exceed 16, and preferably including a surfactant, and a process of using this composition.Type: GrantFiled: January 30, 1990Date of Patent: May 7, 1991Assignee: Dowell Schlumberger IncorporatedInventors: Wayne Frenier, Fred Growcock, Victoria R. Lopp, Brian Dixon
-
Patent number: 5013481Abstract: Disclosed is a boiler chemical having both oxygen scavenging function and softening function. The boiler chemical contains a starch phosphate and/or a water-soluble salt thereof. A starch phosphate and/or a water-soluble salt thereof are/is added to the boiler feed water in a given amount of an amount as determined by the phosphate ion concentration in the boiler water and scaled, as measured, whereby the boiler is prevented from being corroded.Type: GrantFiled: September 19, 1989Date of Patent: May 7, 1991Assignee: Kurita Water Industries, Ltd.Inventor: Shiro Taya
-
Patent number: 5013482Abstract: The present invention provides a composition in contact with a corrodable metal surface, comprising a functional fluid and, as corrosion inhibitor, a compound having the formula I: ##STR1## as well as salts or esters thereof, wherein R.sup.1 is C.sub.4 -C.sub.20 linear or branched alkyl, phenyl or C.sub.7 -C.sub.20 alkylphenyl;R.sup.2 is C.sub.1 -C.sub.12 linear or branched alkyl, phenyl or C.sub.7 -C.sub.20 alkylphenyl, or arylalkyl containing 7-20 carbon atoms;X is CH.sub.2, O or S;Y is O or S; andZ is --(CH.sub.2).sub.n -- in which n is 1, 2, 3, 4 or 5, or Z is --CH.sub.2 --CH(CH.sub.3)--.Some of the compounds of formula I are new.Type: GrantFiled: July 17, 1989Date of Patent: May 7, 1991Assignee: Ciba-Geigy CorporationInventor: Robert M. O'Neil
-
Patent number: 5008039Abstract: A low foaming, rust inhibiting composition is disclosed which contains:A. a rust inhibiting amount of a dicarboxylic acid of the formula: ##STR1## wherein Z is COOH or H, and one of each is present, and x and y are from 3 to 9, with x+y=12;B. a foam inhibiting amount of a triglyceride acid of the formula: ##STR2## wherein x and y are integers from 3 to 9, x and y together equal 12. R.sub.1 and R.sub.2 are saturated/unsaturated hydrocarbon terminals of fatty acids esterified with glycerol; andC. a base sufficient to adjust the pH of the composition of about 6.5 to 10.5.Type: GrantFiled: June 29, 1990Date of Patent: April 16, 1991Assignee: Westvaco CorporationInventors: Fred E. Woodward, Alice P. Hudson
-
Patent number: 5001285Abstract: A process for the preparation of geminate bromo-nitro-alcohols by the bromination of alkali metal or alkaline-earth metal salts of nitroalcohols in aqueous solution, while cooling the reaction mixture so that the maximum reaction temperature does not exceed 30.degree. C. In carrying out the reaction, the aqueous solution of nitroalcohol salt is added to a mixture of bromine and aqueous hydrobromic acid.Type: GrantFiled: May 1, 1989Date of Patent: March 19, 1991Assignee: Henkel Kommanditgesellschaft auf AktienInventors: Willi Wuest, Rainer Eskuchen, Herbert Esser
-
Patent number: 5001286Abstract: Sulphuric and nitric acids present in dinitrotoluene are separated from the dinitrotoluene by adding up to 10 wt. % water (based on quantity of dinitrotoluene) to the mixture of dinitrotoluene, sulphuric acid and nitric acid, mixing and separating the aqueous phase containing nitric and sulphuric acids. The mixtures treated by this process generally contain up to 5 wt. % nitric acid and up to 6 wt. % sulphuric acid.Type: GrantFiled: February 12, 1988Date of Patent: March 19, 1991Assignee: Bayer AktiengesellschaftInventors: Harro Witt, Heiko Beckhaus
-
Patent number: 5000873Abstract: Corrosion of metal surfaces in contact with an aqueous medium is inhibited by incorporating a N-(hydrophobe aromatic)pyridinium compound such as N-(p-dodecylphenyl-2,4,6-trimethylpyridinium sulfoacetate into the aqueous medium.Type: GrantFiled: June 5, 1989Date of Patent: March 19, 1991Assignee: The Dow Chemical CompanyInventors: Thomas E. Fisk, Christopher J. Tucker
-
Patent number: 4999134Abstract: Novel zinc salts, lead salts and/or calcium salts of carboxylic acids of the general formula ##STR1## where A is a radical of the formula ##STR2## Y is --CO-- or --SO.sub.2 --, X.sup.1 is C.sub.1 -C.sub.8 -alkyl, C.sub.1 -C.sub.8 -alkoxy or halogen, X.sup.2 is hydrogen, C.sub.1 -C.sub.8 -alkyl or halogen, X.sup.3 is hydrogen, nitro or halogen, m and n are each 1 or 2, and X.sup.1 may furthermore be hydrogen if A is a radical of the formula (III) or X.sup.3 is nitro or m is 2, in particular the basic salts of (I), are suitable as corrosion inhibitors for coating systems.Type: GrantFiled: September 23, 1988Date of Patent: March 12, 1991Assignee: BASF AktiengesellschaftInventors: Egon Liedek, Gerhard Haegele
-
Patent number: 4996376Abstract: Dinitrotoluenes are prepared by reacting mononitrotoluene(s) with nitric acid, in liquid phase, in the presence of an inorganic and acidic solid including at least one component selected from among orthophosphoric acid, pyrophosphoric acid, metaphosphoric acid, a metal dihydrogen phosphate, a metal hydrogen phosphate, a metal orthophosphate or a metal pyrophosphate, such metal cations having from 1 to 5 positive charges.Type: GrantFiled: October 24, 1989Date of Patent: February 26, 1991Assignee: Rhone-Poulenc ChimieInventors: Claude Doussain, Michel Gubelmann, Jean-Michel Popa
-
Patent number: 4994195Abstract: A composition and methods for use in oilfield waterflood systems are disclosed. The composition is comprised of a phosphonate, a copolymer, and a permanganate and is effective at inhibiting the corrosion of metallic systems in petroleum oilfields caused by chlorine dioxide. Methods of use of phosphonate and permanganate alone are also disclosed. Chlorine dioxide is used in oilfield waterflood systems to control sulfides and sulfate reducing bacteria. However, chlorine dioxide is highly corrosive to the metallic components in the processing equipment of an oilfield system. The most effective system currently used to inhibit corrosion caused by chlorine dioxide comprises chromates. However, chromates are highly toxic and their use throughout the country is becoming increasingly restricted.Type: GrantFiled: June 21, 1989Date of Patent: February 19, 1991Inventors: James G. Edmondson, E. Paul Holder
-
Patent number: 4992603Abstract: Nitromethane is preparaed from a nitriding agent comprising an oxygenated nitrogen compound and a carbon compound containing two carbon atoms and at least one atom other than carbon and hydrogen.Type: GrantFiled: June 9, 1989Date of Patent: February 12, 1991Assignee: S.E.P.P.I.C. Societe d'Exploitation de Produits pour les Industries ChimiquesInventors: Roger Mari, Jacques Quibel
-
Patent number: 4992210Abstract: A composition and method for improving the removal of corrosive contaminants from crude oil within the desalter in a petroleum refinery. An amine is added to the wash water or to the crude oil prior to processing in the desalter. The amine maximizes the yield of wash water removed from the desalter and substantially improves the removal of acid generating corrosive elements.The addition of the amine upstream of the desalter results in the removal of a significant amount of corrosive chlorides from the crude oil before it is passed through the fractionating unit and other refinery operations. Furthermore, the avoidance of adding metals and the assistance in removing other metals from the crude system aids in the reduction or elimination of downstream fouling and petroleum catalyst poisoning.Type: GrantFiled: March 9, 1989Date of Patent: February 12, 1991Assignee: Betz Laboratories, Inc.Inventors: Dennis P. Naeger, Joseph J. Perugini
-
Patent number: 4990699Abstract: Despite the instabity of perfluoralkyl anions, it is possible to perfluoroalkylate aromatic compounds if appropriately substituted by suitable electronegative substituents (e.g., nitro, trifluoromethylsulfonyl, etc.). Thus a novel Meisenheimer complex is formed by thermally decomposing a salt of a perfluoroalkanoic acid in the presence of an aromatic compound such as 1,3,5-trinitrobenzene. Oxidation with organic hypochlorite yields the corresponding perfluoroalkylated aromatic compound.Type: GrantFiled: October 17, 1988Date of Patent: February 5, 1991Assignee: Ethyl CorporationInventor: G. Patrick Stahly
-
Patent number: 4986930Abstract: Premixes of a polyol suitable for polyurethane or polyisocyanurate foam preparation and 1,1-dichloro-1-fluoroethane require no stabilizer to inhibit reaction between the fluorocarbon and the polyol. These premixes are useful for polyurethane and polyisocyanurate foam preparation.Type: GrantFiled: October 3, 1988Date of Patent: January 22, 1991Assignee: Allied-Signal Inc.Inventors: Earl A. E. Lund, Robert G. Richard, Ian R. Shankland, David P. Wilson