Nitrogen Containing Hetero Ring In Preservative Or Stabilizer Patents (Class 570/109)
  • Patent number: 9969917
    Abstract: To provide a method for stably and efficiently producing a working fluid which has less influence over global warming and which can be stably used by a usual operation even though it contains trifluoroethylene (HFO-1123) excellent in the cycle performance. A method for producing a working fluid containing HFO-1123 in a proportion of at most 70 mol %, which comprises mixing a first component containing HFO-1123 in a proportion of higher than 70 mol % stored in a first container, and a second component having no self-decomposition property stored in a second container, by supplying the first component to the second container, by supplying the second component to the first container, or by supplying both the first component and the second component to a separate third container, respectively under the predetermined conditions.
    Type: Grant
    Filed: July 27, 2016
    Date of Patent: May 15, 2018
    Assignee: ASAHI GLASS COMPANY, LIMITED
    Inventors: Masato Fukushima, Satoshi Kawaguchi, Mai Tasaka, Katsuya Ueno
  • Publication number: 20110041530
    Abstract: The present invention relates to compositions comprising at least one fluoroolefin and an effective amount of stabilizer that may be an amine or a mixture of an amine with other stabilizers. The stabilized compositions may be useful in cooling apparatus, such as refrigeration, air-conditioning, chillers, and heat pumps, as well as in applications as foam blowing agents, solvents, aerosol propellants, fire extinguishants, and sterilants.
    Type: Application
    Filed: August 31, 2007
    Publication date: February 24, 2011
    Applicant: E. I. DUPONT DE NEMOURS AND COMPANY
    Inventors: Nandini C. Mouli, Barbara Haviland Minor, Mario Joseph Nappa, Thomas J. Leck
  • Publication number: 20100288965
    Abstract: The present invention relates to compositions comprising at least one fluoroolefin and an effective amount of stabilizer that may be a terpene, terpenoid or fullerene; or a mixture of a terpene, terpenoid or fullerene with other stabilizers. The stabilized compositions may be useful in cooling apparatus, such as refrigeration, air-conditioning, chillers, and heat pumps, as well as in applications as foam blowing agents, solvents, aerosol propellants, fire extinguishants, and sterilants.
    Type: Application
    Filed: August 31, 2007
    Publication date: November 18, 2010
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Jon Lee Howell, Velliyur Nott Mallikarjuna Rao, Thomas J. Leck, Barbara Haviland Minor, Mario Joseph Nappa, Nandini C. Mouli, Ekaterina Swearingen, Andrew Edward Feiring
  • Publication number: 20100288966
    Abstract: The present disclosure relates to compositions comprising at least one fluoroolefin and an effective amount of a stabilizer comprising at least one ascorbic acid, terephthalate, or nitromethane, or mixtures thereof. The stabilized compositions may be useful in cooling apparatus, such as refrigeration, air-conditioning, chillers and heat pumps, as well as in applications as foam blowing agents, solvents, aerosol propellants, fire extinguishants, and sterilants.
    Type: Application
    Filed: August 31, 2007
    Publication date: November 18, 2010
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Thomas J. Leck, Barbara Haviland Minor, Mario Joseph Nappa, Nandini C. Mouli, Jon Lee Howell
  • Patent number: 7118689
    Abstract: Polychloroethylene, e.g., trichioroethylene and perchloroethylene, is stabilized with a stabilizing amount of a stable free radical stabilizer, e.g., a material having the 2,2,6,6-tetra(lower alkyl)-1-piperidinyloxy-yl free radical group, such as 2,2,6,6-tetramethyl-4-hydroxy-1-piperidinyloxy, or the 2,2,5,5-tetra(lower alkyl)pyrrolidinyloxy group, such as 2,2,5,5-tetramethyl pyrrolidinyloxy. Stable free radical stabilizer is removed from a polychloroethylene composition containing same by contacting the composition with silica, e.g., precipitated silica.
    Type: Grant
    Filed: August 27, 2003
    Date of Patent: October 10, 2006
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Earl M. Gorton, Ronald D. Olinger
  • Publication number: 20040030203
    Abstract: Trichloroethane, e.g., 1,1,1-trichloroethane, is stabilized during processing at temperatures at which it is susceptible to thermal decomposition by conducting such processing in the presence of a stabilizing amount of a stable free radical stabilizer, e.g., a material having a 2,2,6,6-tetra(lower alkyl)-1-piperidinyloxy-yl free radical group such as 2,2,6,6-tetramethyl-4-hydroxy-1-piperidinyloxy.
    Type: Application
    Filed: May 13, 2003
    Publication date: February 12, 2004
    Inventors: Earl M. Gorton, Ronald D. Olinger, Stephen D. Miller
  • Patent number: 6350395
    Abstract: 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: Grant
    Filed: June 16, 2000
    Date of Patent: February 26, 2002
    Assignee: The Dow Chemical Company
    Inventor: Marius Kuemin
  • Patent number: 5696306
    Abstract: A decomposition inhibitor for hydrochlorofluorocarbons and hydrofluorocarbons (HCFCs/HFCs) which comprises at least one member of the class consisting of organic acid-amine mixtures, fluorine-free halogenated hydrocarbons, carboxylic acid esters, nitrile compounds, carbonyl compounds and halogenated nitro compounds. A method of inhibiting the decomposition of HCFCs/HFCs which comprises using the decomposition inhibitor mentioned above.In the field of polyurethane foam manufacture using HCFCs/HFCs as blowing agents, the effect of inhibiting the decomposition of HCFCs/HFCs can be produced over a long period of time covering the storage of raw materials, the foam manufacturing process and the use of foamed products.
    Type: Grant
    Filed: June 22, 1995
    Date of Patent: December 9, 1997
    Assignee: Daikin Industries, Ltd.
    Inventors: Satoshi Ide, Tatsumi Tsuchiya, Naoki Maekawa, Tsuyoshi Inaba, Hirokazu Aoyama
  • Patent number: 4956017
    Abstract: A solvent, 1,1,1-trichloroethane, is stabilized against corrosion by the addition of a non-volatile polyether or complex polyether having an average molecular weight of from about 550 to about 8500. A painting formulation is prepared using the stabilized solvent.
    Type: Grant
    Filed: May 5, 1989
    Date of Patent: September 11, 1990
    Assignee: The Dow Chemical Company
    Inventors: Felipe A. Donate, George E. Hartwell, Bruce D. DeBolt, James G. Papajesk, Mark V. Buzzard
  • Patent number: 4942267
    Abstract: Decomposition of perchloroethylene is prevented by the addition of a stabilizer system containing N-substituted cyclic alkyl amine, alcohol of 3-7 carbon atoms and olefin components. The stabilizer system is advantageous in that it does not contain any environmentally undersirable materials.
    Type: Grant
    Filed: July 28, 1988
    Date of Patent: July 17, 1990
    Assignee: Occidential Chemical Corporation
    Inventors: Roger W. Roark, Glenn R. Cairns, Edward A. Rowe, Jr.
  • Patent number: 4795837
    Abstract: A stabilized composition of 1,1,1-trichloroethane comprising an epoxide compound, a nitro compound, and a furan compound.
    Type: Grant
    Filed: March 6, 1984
    Date of Patent: January 3, 1989
    Assignee: Solvay & Cie (Societe Anonyme)
    Inventors: Michel Servais, Roger Crochet
  • Patent number: 4608448
    Abstract: Reaction of ferric chloride with 2-chloro-p-xylene yields dichloro-p-xylene having a high ratio of 2,5-dichloro-p-xylene isomer to 2,3-dichloro-p-xylene isomer.
    Type: Grant
    Filed: November 24, 1981
    Date of Patent: August 26, 1986
    Assignee: Union Carbide Corporation
    Inventor: Young-Jin Lee
  • Patent number: 4424386
    Abstract: Metal corrosion in the presence of methylchloroform is inhibited when thiazolidine is added to the methylchloroform. The inhibitor is useful in degreasing processes and may be used in combination with other known inhibitors.
    Type: Grant
    Filed: September 10, 1981
    Date of Patent: January 3, 1984
    Assignee: The Dow Chemical Company
    Inventor: Nobuyuki Ishibe
  • Patent number: 4404412
    Abstract: Trichloroethylene is stabilized against oxidation by adding a nitrogen-containing compound selected from among .alpha.-(dimethylamino) propionitrile, thiazole, 1-aza-2-alkoxy-1-cycloalkene and 1,5-diazabicyclo[5.4.0]undec-5-ene. These may be used in combination with ethyl acetate, acetonitrile and pyrazine.
    Type: Grant
    Filed: February 4, 1982
    Date of Patent: September 13, 1983
    Assignee: The Dow Chemical Company
    Inventors: Nobuyuki Ishibe, Jimmie K. Harden
  • Patent number: 4392000
    Abstract: The invention relates to compositions of chlorinated solvents such as 1,1,1-trichloroethane, stabilized by means of a heterocyclic compound containing oxaziridine units, such as 2-tert.-butyloxaziridine.
    Type: Grant
    Filed: October 19, 1981
    Date of Patent: July 5, 1983
    Assignee: Solvay & Cie.
    Inventors: Andre' Ryckaert, Michel Servais
  • Patent number: 4375006
    Abstract: Dibromostyrene has a marked tendency to polymerize on storage. The induction period can be lengthened with the use of a stabilizing quantity of n-propylgallate. The induction period can be markedly prolonged when the gallate ester is admixed with phenothiazine, N,N,N',N'-tetramethyl-p-phenylenediamine, or 4-tert-butyl catechol.
    Type: Grant
    Filed: August 14, 1981
    Date of Patent: February 22, 1983
    Assignee: Ethyl Corporation
    Inventor: Philip F. Jackisch
  • Patent number: 4368338
    Abstract: A stabilized chlorinated solvent composition useful in removing grease from metals wherein the solvent is perchloroethylene or trichloroethylene, and the stabilizer is N-methyl pyrrole in combination with ethyl acetate, acetonitrile or pyrazine.
    Type: Grant
    Filed: June 18, 1981
    Date of Patent: January 11, 1983
    Assignee: The Dow Chemical Company
    Inventors: Nobuyuki Ishibe, Jimmie K. Harden nee Ashley
  • Patent number: 4351973
    Abstract: A stabilized methylchloroform for use in vapor degreasing which is stable in the presence of metals which contains pyrazine, dimethoxypropane, an acetylenic alcohol and a nitroalkane or a methylfuran. Such combination prevents corrosion of aluminum, iron, copper and zinc and the decomposition of the solvent.
    Type: Grant
    Filed: October 6, 1980
    Date of Patent: September 28, 1982
    Assignee: The Dow Chemical Company
    Inventors: Nobuyuki Ishibe, Warren F. Richey
  • Patent number: 4347154
    Abstract: Certain substituted succinic acid, e.g., sodium alkenyl succinate, and substituted imidazoline derivatives, e.g., (ethoxypropionic acid) imidazoline, provide corrosion resistance for tin-plated steel and solvent stability to aerosol formulations containing alcohol, methylene chloride and water, which employ a hydrocarbon as the propellant.
    Type: Grant
    Filed: October 23, 1980
    Date of Patent: August 31, 1982
    Assignee: The Dow Chemical Company
    Inventor: Robert W. Simmons
  • Patent number: 4293433
    Abstract: Electrical devices such as transformers and power capacitors are improved by the use of a dielectric fluid prepared by combining perchloroethylene having a low chlorinated ethane content with an antioxidant. This fluid has excellent resistance to decomposition over long periods of time and under severe operational conditions.
    Type: Grant
    Filed: June 2, 1980
    Date of Patent: October 6, 1981
    Assignee: Diamond Shamrock Corporation
    Inventors: Jack A. Borror, Edward A. Rowe, Jr.
  • Patent number: 4263464
    Abstract: A methylene chloride composition is stabilized by hexamethylenetetramine, optionally mixed with one or more epoxides. The methylene chloride thus stabilized is very suitable for aerosol compositions containing large amounts of water.
    Type: Grant
    Filed: October 23, 1978
    Date of Patent: April 21, 1981
    Assignee: Solvay & Cie.
    Inventors: Marcel Godfroid, Roger Gerkens
  • Patent number: 4231968
    Abstract: Addition of 0.2-2 weight % of 2-methyl-2,3-epoxypropanol-(1), and preferably also 0.2-2% of methyl tert-butyl ether, produces highly stabilized 1,1,1-trichloroethane.
    Type: Grant
    Filed: January 22, 1979
    Date of Patent: November 4, 1980
    Assignee: Chemische Werke Huls Aktiengesellschaft
    Inventors: Leonhardt Magiera, Raban Grundmann, Dieter Krockenberger