Azeotropic Or Azeotrope-like Composition Patents (Class 510/408)
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Patent number: 6583101Abstract: Hard floor finishes and other stubborn soils can be removed using an aqueous dispersion of an alkylene glycol phenyl ether solvent combined with an ether alcohol solvent/coupler. Each component is used at a concentration that result in the creation of a visible dispersed appearance of the aqueous dilute use solutions. We have found that the alkylene glycol phenyl ether, in combination with at least one ether alcohol coupler or solvent, interacts with the aqueous medium to surprisingly provide enhanced cleaning performances. Hard to remove soils such as highly crosslinked urethanes and acrylic materials can be solubilized and removed by the alcohol solvent dispersions of the invention. We have found that the alkylene phenyl ether solvent requires a specific coupler cosolvent for activity. Such activity can be enhanced by the presence of a second coupler cosolvent and the use of a specific class of nonionic surfactant materials.Type: GrantFiled: August 25, 1999Date of Patent: June 24, 2003Assignee: Ecolab Inc.Inventors: Wendy M. Wiseth, Kim R. Smith, Victor F. Man, Scott I. De Fields, Reid Rabon, Mark D. Levitt
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Patent number: 6551978Abstract: An azeotropic solvent composition comprising 90.3 mass % of 1,3-dichloro-1,1,2,2,3-pentafluoropropane and 9.7 mass % of n-hexane.Type: GrantFiled: June 4, 2001Date of Patent: April 22, 2003Assignee: Asahi Glass Company, LimitedInventors: Tsuyoshi Hanada, Masaaki Tsuzaki
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Publication number: 20030073594Abstract: This invention provides azeotrope-like compositions of 1,1,1,2-tetrafluoroethane, 1,1,1,3,3-pentafluoropropane-245fa and water that are environmentally desirable for use as refrigerants, aerosol propellants, metered dose inhalers, blowing agents for polymer foam, heat transfer media, and gaseous dielectrics.Type: ApplicationFiled: June 10, 2002Publication date: April 17, 2003Inventors: Mary C. Bogdan, Gary M. Knopeck, Hang T. Pham, Rajiv R. Singh, David Dressler, David J. Williams
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Patent number: 6534467Abstract: The invention relates to azeotropic and azeotrope-like mixtures of 1,2,2-trichloro-1,3,3,3-tetrafluoropropane (commonly known as HCFC-224aa, and with the IUPAC name of 2,2,3-trichloro-1,1,1,3-tetrafluoropropane;registry number 139754-75-9) and hydrogen fluoride (hydrofluoric acid), which are useful as intermediates in the production of 1,1,3,3,3-pentafluoropropane (HFC-245-fa) and 1,1,1,2,2,3,3-heptafluoropropane (HFC-227ca).Type: GrantFiled: January 24, 2001Date of Patent: March 18, 2003Assignee: Honeywell International Inc.Inventors: Hang Thanh Pham, Rajiv Ratna Singh, Hsueh Sung Tung
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Patent number: 6531441Abstract: Refrigerant compositions include mixtures of difluoromethane and isobutane, butane, propylene or cyclopropane; pentafluoroethane and propylene or cyclopropane; 1,1,2,2-tetrafluoroethane and propane; 1,1,1,2-tetrafluoroethane and cyclopropane; 1,1,1-trifluoroethane and DME or propylene; 1,1-difluoroethane and propane, isobutane, butane or cyclopropane; fluoroethane and propane or cyclopropane; 1,1,1,2,2,3,3-heptafluoropropane and butane, cyclopropane, DME, isobutane or propane; or 1,1,1,2,3,3,3-heptafluoropropane and butane, cyclopropane, isobutane or propane.Type: GrantFiled: August 27, 1999Date of Patent: March 11, 2003Assignee: E. I. du Pont de Nemours and CompanyInventors: Barbara Haviland Minor, Donald Bernard Bivens, Brooks Shawn Lunger
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Publication number: 20030022802Abstract: Disclosed are azeotrope-like compositions comprising 1,1,1,3,3-pentafluorobutane, water and a hydrocarbon selected from the group consisting of n-pentane, isopentane, cyclopentane, n-hexane, and isohexane., said compositions are environmentally desirable for use as refrigerants, aerosol propellants, metered dose inhalers, blowing agents for polymer foam, heat transfer media, and gaseous dielectrics.Type: ApplicationFiled: June 3, 2002Publication date: January 30, 2003Inventors: Mary C. Bogdan, Kane D. Cook, Hang T. Pham, Gary M. Knopeck, Rajiv R. Singh
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Publication number: 20030004077Abstract: This invention provides azeotrope-like compositions of 1,1,1,2-tetrafluoroethane, 1,1,1,3,3-pentafluoropropane-245fa and water that are environmentally desirable for use as refrigerants, aerosol propellants, metered dose inhalers, blowing agents for polymer foam, heat transfer media, and gaseous dielectrics.Type: ApplicationFiled: June 10, 2002Publication date: January 2, 2003Inventors: Mary C. Bogdan, Hang T. Pham, David J. Williams, Gary M. Knopeck, Rajiv R. Singh, Kane D. Cook
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Patent number: 6500795Abstract: The invention relates to azeotropic and azeotrope-like mixtures of 1-chloro-1,3,3,3-tetrafluoropropane (HCFC-244fa) and hydrogen fluoride, which are useful as intermediates in the production of HCFC-244fa.Type: GrantFiled: January 24, 2001Date of Patent: December 31, 2002Assignee: Honeywell International Inc.Inventors: Hang Thanh Pham, Rajiv Ratna Singh, Hsueh Sung Tung, Milton Cook
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Patent number: 6486114Abstract: Azeotrope-like compositions comprising pentafluoropropane and a perfluorocarbon having 5 to 7 carbon atoms or N-methylperfluoromorpholine OR N-ethylperfluoromorpholine are stable and have utility as refrigerants for heating and cooling, blowing agents, solvents and fire extinguishing agents.Type: GrantFiled: September 28, 1998Date of Patent: November 26, 2002Assignee: Electric Power Research Institute, Inc.Inventors: David Nalewajek, Earl A. E. Lund, David P. Wilson
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Patent number: 6475971Abstract: The invention relates to azeotropic and azeotrope-like mixtures of 1,2-dichloro-3,3,3-trifluoropropene (HCFC-1223xd) and hydrogen fluoride, which are useful as intermediates in the production of HCFC-1223xd.Type: GrantFiled: January 24, 2001Date of Patent: November 5, 2002Assignee: Honeywell International Inc.Inventors: Hang Thanh Pham, Rajiv Ratna Singh, Hsueh Sung Tung
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Patent number: 6472444Abstract: A closed cell phenolic foam is formed from a phenolic resin, a blowing agent such as HCFC141b, a catalyst and less than 2.5% by weight relative to the resin of at least one hydrofluoroether or an azeotrope formulation thereof. 1-methoxy-nonafluorobutane and especially an azeotrope formulation thereof with trans-1,2-dichloroethylene are preferred hydrofluoroethers. The phenolic foam has a stable closed cell content of greater than 90% and a stable thermal conductivity.Type: GrantFiled: September 27, 2001Date of Patent: October 29, 2002Assignee: Kingspan Industrial Insulation LimitedInventors: Mark Stanley Harris, Graham Morgan Edgerley
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Publication number: 20020129840Abstract: Disclosed is a composition of about 20 to about 80 wt % benzotrifluoride and about 20 to about 80 wt % trichloroethylene. Up to about 1 wt % of a stabilizer for the trichloroethylene can be included in the composition.Type: ApplicationFiled: February 13, 2002Publication date: September 19, 2002Applicant: EMERALD AGROCHEMICALS COMPANY AVVInventors: Hang-Chang Bobby Chen, Edward A. Rowe
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Patent number: 6423673Abstract: The invention provides azeotrope-like compositions consisting essentially of 1,1,1,3,3-pentafluorobutane and a fluorinated ketone, RfC(O)CF(CF3)2, where Rf is CF3CF2, CF3CF2CF2, or (CF3)2CF.Type: GrantFiled: September 19, 2001Date of Patent: July 23, 2002Assignee: 3M Innovation Properties CompanyInventors: John G. Owens, Dean S. Milbrath
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Patent number: 6403550Abstract: Azeotropic and azeotrope-like compositions of 142/365 mfc, 142/methanol, and 142/365 mfc/methanol are provided, as are methods for using the same for cleaning, drying, foam blowing and the like.Type: GrantFiled: March 10, 2000Date of Patent: June 11, 2002Assignee: ATOFINA Chemicals, Inc.Inventors: Michael S. Bolmer, Pascal Michaud
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Patent number: 6399562Abstract: Azeotropic or near azeotropic solvent compositions, based on 1-difluoromethoxy-1,1,2,2-tetrafluoroethyl difluoromethyl ether, essentially consisting of (% by weight): I) 1-difluoromethoxy 15-99 1,1,2,2-tetrafluoroethyl difluromethyl ether (HCF2OCF2CF2OCF2H); isopentane 85-1 II) 1-difluromethoxy 25-99 1,1,2,2-tetrafluroethyl difluoromethyl ether (HCF2OCF2CF2OCF2H); methyl-acetate 75-1 III) 1-difluoromethoxy 35-99 1,1,2,2-tetrafluoroethyl difluoromethyl ether (HCF2OCF2CF2OCF2H); 1-bromo-propane 65-1.Type: GrantFiled: February 9, 2001Date of Patent: June 4, 2002Assignee: Ausimont S.p.A.Inventors: Giampiero Basile, Mario Visca, Ezio Musso
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Publication number: 20020058600Abstract: Substantially nonaqueous concentrates for use in preparing stable, aqueous cleaner/degreaser compositions in the form of totally water soluble solutions comprise (a) at least one sparingly water soluble organic solvent having certain defined characteristics; (b) a solubilizing additive consisting of from approximately 0.1 to approximately 100 weight percent of a surfactant and from 0 to approximately 99.9 weight percent of a coupler, the solubilizing additive being present in an amount of approximately 3% to approximately 15% by weight excess over that minimally required to form a clear solution when the concentrate is combined with water; and (c) not more than 10.0 weight percent of water; (d) the concentrate forming a barely clear, totally water soluble solution when diluted with water to produce a solution having the desired cleaning/degreasing strength.Type: ApplicationFiled: September 13, 2001Publication date: May 16, 2002Inventor: Donald N. Van Eenam
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Patent number: 6380148Abstract: The present invention provides a method for isolating and purifying 1,1,1,2,2-pentafluoroethyl iodide or hydrogen fluoride from a mixture of 1,1,1,2,2-pentafluoroethyl iodide and hydrogen fluoride, characterized by distilling an azeotropic mixture of 1,1,1,2,2-pentafluoroethyl iodide and hydrogen fluoride from a mixture containing 1,1,1,2,2-pentafluoroethyl iodide and hydrogen fluoride either after liquid—liquid separation when the mixture is heterogeneous or directly when the mixture is homogeneous to obtain 1,1,1,2,2-pentafluoroethyl iodide or hydrogen fluoride from the bottom of the distillation column.Type: GrantFiled: June 22, 2001Date of Patent: April 30, 2002Assignee: Daikin IndustriesInventors: Eiji Seki, Tatsuya Otsuka, Tatsuya Hirata, Yoshinori Tanaka, Hirokazu Aoyama
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Patent number: 6372705Abstract: Azeotropic compositions made up of (a) from about 26 to about 72% by weight perfluorohexane and (b) one compound selected from (1) about 36 to about 74% by weight 2-methyl butane or (2) about 28 to about 53% by weight n-pentane in which the sum of the weight percent (a) and weight percent (b) is 100 percent may be used as blowing agents in the production of polyurethane/polyurea foams.Type: GrantFiled: March 24, 1995Date of Patent: April 16, 2002Assignee: Bayer CorporationInventors: Joachim Werner, Scott A. Kane, Herman P. Doerge, Eric F. Boonstra
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Patent number: 6369017Abstract: When certain weight ratios of certain flammable additive components (an ether and an epoxyalkane) are blended in n-propyl bromide, the components can actually function as flame retardants or flame suppressants when the resulting cleaning composition is used in aerosol applications. The proportions of the additives used are small; yet suitably effective stabilization against metallic corrosion is achieved even at mildly elevated temperatures.Type: GrantFiled: February 23, 2001Date of Patent: April 9, 2002Assignee: Albemarle CorporationInventors: Ronald L. Shubkin, Eric W. Liimatta
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Patent number: 6365566Abstract: This invention provides azeotropic and azeotrope-like compositions of 1,1,1,3,3-pentafluorobutane and water that are environmentally desirable for use as blowing agents and solvents.Type: GrantFiled: March 21, 2001Date of Patent: April 2, 2002Assignee: Honeywell International Inc.Inventors: Mary C. Bogdan, Hang T. Pham, Hsueh Sung Tung, David J. Williams, Leslie Bement
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Patent number: 6358908Abstract: Azeotropic compositions made up of (a) from about 4 to about 50% by weight 1,3-dioxolane and (b) one compound selected from (1) about 75 to about 96% by weight cyclopentane, (2) about 60 to about 79% by weight 2-methyl pentane, (3) about 59 to about 77% by weight 3-methyl pentane, and (4) about 50 to about 69% by weight n-hexane in which the sum of the weight percent of (a) plus weight percent of (b) is approximately 100 percent are used as blowing agents in the production of polyurethane/polyurea foams.Type: GrantFiled: March 24, 1995Date of Patent: March 19, 2002Assignee: Bayer CorporationInventors: Joachim Werner, Scott A. Kane, Herman P. Doerge, Eric F. Boonstra
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Patent number: 6358434Abstract: Foam blowing agent blends of D11 and a pentane are provided, as are polyol premixes containing such blends. The resulting foams exhibit dramatic improvement in fire resistance.Type: GrantFiled: May 21, 2001Date of Patent: March 19, 2002Assignee: ATO FINA Chemicals, Inc.Inventors: Jinhuang Wu, Douglas R. Dillon, Richard M. Crooker
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Patent number: 6348515Abstract: Foam blowing agents blends of HFC-134a and a pentane selected from n-pentane, i-pentane and i-pentane/cyclopentane are provided, as are polyol premixes and polyurethane foam compositions containing such blends.Type: GrantFiled: September 6, 2000Date of Patent: February 19, 2002Assignee: Atofina Chemicals, Inc.Inventors: Jinhuang Wu, Douglas R. Dillon
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Patent number: 6328907Abstract: There is provided an azeotropic mixture consisting substantially of 1,1,1, 3,3-pentafluoropropane and hydrogen fluoride. Further, there is provided a process of separating/purifying R-245fa and/or HF from a mixture comprising R-245fa and HF wherein the mixture comprising 1,1,1,3,3-pentafluoropropane and hydrogen fluoride is subjected to a distillation step so that a distillate is obtained which comprises the azeotropic mixture consisting substantially of 1,1,1,3,3-pentafluoropropane and hydrogen fluoride, and a bottom product is obtained which comprises separated/purified 1,1,1,3,3-pentafluoropropane or hydrogen fluoride.Type: GrantFiled: July 23, 1998Date of Patent: December 11, 2001Assignee: Daikin Industries, Ltd.Inventors: Tatsuo Nakada, Noriaki Shibata, Takashi Shibanuma
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Publication number: 20010041667Abstract: The present invention provides a method for isolating and purifying 1,1,1,2,2-pentafluoroethyl iodide or hydrogen fluoride from a mixture of 1,1,1,2,2-pentafluoroethyl iodide and hydrogen fluoride, characterized by distilling an azeotropic mixture of 1,1,1,2,2-pentafluoroethyl iodide and hydrogen fluoride from a mixture containing 1,1,1,2,2-pentafluoroethyl iodide and hydrogen fluoride either after liquid-liquid separation when the mixture is heterogeneous or directly when the mixture is homogeneous to obtain 1,1,1,2,2-pentafluoroethyl iodide or hydrogen fluoride from the bottom of the distillation column.Type: ApplicationFiled: June 22, 2001Publication date: November 15, 2001Inventors: Seki Eiji, Otsuka Tatsuya, Hirata Tatsuya, Tanaka Yoshinori, Aoyama Hirokazu
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Publication number: 20010034378Abstract: Foam blowing agents blends of 5-50 mole % HCFC-22 and 95-50 mole % of n-pentane, i-pentane and/or cyclopentane are provided, as are polyol premixes and polyurethane foam compositi ons containing such blends.Type: ApplicationFiled: February 16, 2001Publication date: October 25, 2001Applicant: Atofina Chemicals, Inc.Inventors: Jinhuang Wu, Douglas R. Dillon
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Patent number: 6303668Abstract: 1,1,1,3,3-Pentafluorobutane forms azeotropic or pseudoazeotropic compositions with alkanes possessing 5 or 6 carbon atoms. These compositions can be used in particular as blowing agents in polymeric cellular foams.Type: GrantFiled: November 22, 1999Date of Patent: October 16, 2001Assignee: Solvay (Societe Anonyme)Inventors: Pierre Barthelemy, Olivier Buyle, Pierre Dournel
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Patent number: 6291416Abstract: In order to replace compositions based on CFC or on HCFC in cleaning or drying applications on solid surfaces (in particular defluxing), the invention provides azeotropic or near-azeotropic compositions based on 1,1,1,3,3-pentafluorobutane, on dichloromethane, on methanol and on 1,1,1,2,3,4,4,5,5,5-decafluoropentane.Type: GrantFiled: April 21, 2000Date of Patent: September 18, 2001Assignee: AtofinaInventors: Pascal Michaud, Jean-Jacques Martin
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Patent number: 6281186Abstract: In order to replace compositions based on CFC or on HCFC in cleaning or drying applications on solid surfaces (in particular defluxing), the invention provides azeotropic or near-azeotropic compositions based on 1,1,1,2,3,4,4,5,5,5-decafluoropentane, on dichloromethane, on cyclopentane and on methanol.Type: GrantFiled: April 21, 2000Date of Patent: August 28, 2001Assignee: AtofinaInventors: Pascal Michaud, Jean-Jacques Martin
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Patent number: 6281184Abstract: Compns. based on azeotropic or quasi-azeotropic mixts. of trichloroethylene and 1,1,1,2,3,4,4,5,5,5-decafluoropentane are useful for replacing CFC or HCFC in cleaning and degreasing of surfaces (e.g., defluxing of printed circuits) and drying of surfaces. The ability of these compns. to dry surfaces is improved by addn. of RCONR(CH2)nNHCOR surfactants (R=C14-22 alkyl, n=1-5).Type: GrantFiled: April 21, 2000Date of Patent: August 28, 2001Assignee: AtofinaInventors: Pascal Michaud, Jean-Jacques Martin
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Publication number: 20010012827Abstract: Azeotrope-like compositions comprising pentafluoropropane and a perfluorocarbon having 5 to 7 carbon atoms or N-methylperfluoromorpholine OR N-ethylperfluoromorpholine are stable and have utility as refrigerants for heating and cooling, blowing agents, solvents and fire extinguishing agents.Type: ApplicationFiled: September 28, 1998Publication date: August 9, 2001Inventors: DAVID NALEWAIJEK, EARL A. E. LUND, DAVID WILSON
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Patent number: 6271189Abstract: The present invention provides a method for isolating and purifying 1,1,1,2,2-pentafluoroethyl iodide or hydrogen fluoride from a mixture of 1,1,1,2,2-pentafluoroethyl iodide and hydrogen fluoride, characterized by distilling an azeotropic mixture of 1,1,1,2,2-pentafluoroethyl iodide and hydrogen fluoride from a mixture containing 1,1,1,2,2-pentafluoroethyl iodide and hydrogen fluoride either after liquid-liquid separation when the mixture is heterogeneous or directly when the mixture is homogeneous to obtain 1,1,1,2,2-pentafluoroethyl iodide or hydrogen fluoride from the bottom of the distillation column.Type: GrantFiled: December 13, 1999Date of Patent: August 7, 2001Assignee: Daikin Industries, Ltd.Inventors: Eiji Seki, Tatsuya Otsuka, Tatsuya Hirata, Yoshinori Tanaka, Hirokazu Aoyama
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Publication number: 20010011107Abstract: Use as foaming agents having a low environmental impact of azeotropic or near azeotropic compositions using difluoromethoxy-bis(difluoromethyl ether) and/or 1-difluroromethoxy-1,1,2,2-tetrafluoroethyl difluoromethyl ether.Type: ApplicationFiled: August 16, 1999Publication date: August 2, 2001Inventors: EZIO MUSSO, GIAMPIERO BASILE, SAURO GIROLOMONI
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Patent number: 6261472Abstract: Disclosed are binary azeotrope-like compositions, and uses thereof, of fluoroethane (HFC-161), with hydrofluorocarbons, such as, 2-fluoropropane (HFC-281ea), and 1,1-difluoroethane (HFC-152a), or hydrocarbons, or dimethyl ether.Type: GrantFiled: October 3, 1997Date of Patent: July 17, 2001Assignee: E. I. du Pont de Nemours and CompanyInventors: Vinci Martinez Felix, Barbara Haviland Minor, Allen Capron Sievert
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Patent number: 6255273Abstract: Azeotropic or near azeotropic compositions based on difluoromethoxy-bis(difluoromethyl ether) and/or 1-difluoromethoxy-1,1,2,2-tetrafluoroethyl difluoromethyl ether.Type: GrantFiled: August 16, 1999Date of Patent: July 3, 2001Assignee: Ausimont S.p.A.Inventors: Ezio Musso, Giampiero Basile, Sauro Girolomoni
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Patent number: 6242410Abstract: There is provided an azeotropic mixture consisting substantially of a hexafluoropropylene dimer and acetonitrile. In addition, there is provided a process for the separation of a hexafluoropropylene dimer which does not substantially contain acetonitrile, or acetonitrile which does not substantially contain a hexafluoropropylene dimer from a mixture which contains acetonitrile and the hexafluoropropylene dimer, comprising the steps of subjecting the mixture to a distillation operation and distilling off the azeotropic mixture which consists substantially of the hexafluoropropylene dimer and acetonitrile.Type: GrantFiled: September 25, 1998Date of Patent: June 5, 2001Assignee: Daikin Industries, Ltd.Inventors: Hirokazu Aoyama, Akikazu Tabuchi
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Patent number: 6221830Abstract: The disclosure relates to removing impurities from hexafluoroethane (CF3CF3), also known as Perfluorocarbon 116 (PFC-116) or Fluorocarbon 116 (FC-116), by using azeotropic distillation such that an overhead product consisting essentially of HCl-hexafluoroethane is formed, optionally combined with a phase separation step to break the HCl-hexafluoroethane azeotropic or azeotrope-like composition thereby permitting recovery of substantially pure hexafluoroethane. Unreacted hydrogen fluoride (HF) may be removed from hexafluoroethane during the above azeotropic distillation with HCl or alternatively by an azeotropic distillation wherein an HF-hexafluoroethane azeotropic or azeotrope-like composition exits overhead and substantially pure HF exits in the bottoms stream.Type: GrantFiled: April 17, 1997Date of Patent: April 24, 2001Assignee: E. I. du Pont de Nemours and CompanyInventors: Ralph Newton Miller, Mark Richard Deschere, Barry Asher Mahler, Olagappan Muthu
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Patent number: 6221273Abstract: Azeotropic or near azeotropic compositions based on hexafluoropropane (R 236) as substitutes of CClF2-CClF2 (R 114) which essentially consist of R 236 and bis(difluoromethyl)-ether or n-butane, or mixtures thereof, for heat pumps, air-conditioners, etc.Type: GrantFiled: July 9, 1998Date of Patent: April 24, 2001Assignee: Ausimont S.p.A.Inventors: Giampiero Basile, Ezio Musso
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Patent number: 6214252Abstract: An azeotrope-like composition comprising: (A) 1,1,1,2-tetrafluoroethane and (B) n-pentane: also described is a heat transfer device comprising the azeotrope-like composition.Type: GrantFiled: April 30, 1998Date of Patent: April 10, 2001Assignee: Imperial Chemical Industries PLCInventor: James David Morrison
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Patent number: 6211135Abstract: A process is disclosed for the separation of a mixture of HF and CF3CCl2CF3. The process involves placing the mixture in a separation zone at a temperature of from about 0° C. to about 100° C. and at a pressure sufficient to maintain the mixture in the liquid phase, whereby an organic-enriched phase comprising less than 69 mole percent HF is formed as the bottom layer and an HF-enriched phase comprising more than 90 mole percent HF is formed as the top layer. The organic-enriched phase can be withdrawn from the bottom of the separation zone and subjected to distillation in a distillation column to recover essentially pure CF3CCl2CF3. The distillate comprising HF and CF3CCl2CF3 can be removed from the top of the distillation column, while essentially pure CF3CCl2CF3 can be recovered from the bottom of the distillation column. Also, the HF-enriched phase can be withdrawn from the top of the separation zone and subjected to distillation in a distillation column.Type: GrantFiled: April 1, 1999Date of Patent: April 3, 2001Assignee: E. I. du Pont de Nemours and CompanyInventors: Ralph Newton Miller, V. N. Mallikarjuna Rao, Steven H. Swearingen
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Patent number: 6187729Abstract: A liquid cleaning composition comprising a solvating agent and a rinsing agent, the ratio of the vapor pressure of said rinsing agent to the vapor pressure of said solvating agent being at least about 20 and the use thereof to clean substrates that have soil adhered thereto.Type: GrantFiled: June 6, 1995Date of Patent: February 13, 2001Assignee: Petroferm Inc.Inventors: Michael E. Hayes, Donald P. Hosman, Kevin R. Hrebenar, Robert D. Sell
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Patent number: 6174850Abstract: To replace compositions based on CFCs or CFHCs in applications for cleaning or drying solid surfaces (in particular defluxing), the invention proposes azeotropic or quasi-azeotropic compositions based on 1,1,1,2,3,4,4,5,5,5-decafluoropentane, 1,1,1,3,3-pentafluorobutane and, optionally, methanol.Type: GrantFiled: July 20, 1999Date of Patent: January 16, 2001Assignee: AtofinaInventor: Pascal Michaud
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Patent number: 6107267Abstract: A process is disclosed for recovering HF from a product mixture including HF and CF.sub.3 CF.sub.2 CHF.sub.2. The process involves (1) distilling the product mixture to remove all products which have a lower boiling point than the lowest boiling azeotrope containing HF and CF.sub.3 CF.sub.2 CHF.sub.2 ; and (2) distilling the azeotrope to recover HF as an azeotropic composition containing HF and CF.sub.3 CF.sub.2 CHF.sub.2. Also disclosed are compositions of hydrogen fluoride in combination with an effective amount of CF.sub.3 CF.sub.2 CHF.sub.2 to form an azeotrope or azeotrope-like composition with hydrogen fluoride, (e.g., compositions containing from about 57.1 to 67.2 mole percent CF.sub.3 CF.sub.2 CHF.sub.2).A process for producing certain compositions comprising(a) CF.sub.3 CF.sub.2 CHF.sub.2 and (b) at least one saturated halogenated hydrocarbon and/or ether having the formula:C.sub.n H.sub.2n+2-a-b Cl.sub.a F.sub.b O.sub.Type: GrantFiled: August 20, 1998Date of Patent: August 22, 2000Assignee: E. I. du Pont de Nemours and CompanyInventors: V. N. Mallikarjuna Rao, Allen Capron Sievert, Munirpallam A. Subramanian
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Patent number: 6099694Abstract: The invention relates to an improvement in a process in which chlorine and difluoromethane are present in a distillation column, for example, a fluorination reaction. By controlling the chlorine feed such that the concentration of chlorine relative to difluoromethane in the distillation column is maintained below about 22 weight percent (the flammability threshold for chlorine in a mixture of difluoromethane and chlorine), formation of a flammable difluoromethane/chlorine mixture may be minimized or avoided. The invention is particularly useful in a process for the preparation of difluoromethane wherein at least one distillation column separates difluoromethane from unreacted starting materials such as methylene chloride, hydrogen fluoride and monochloromonofluoromethane.Type: GrantFiled: March 23, 1998Date of Patent: August 8, 2000Assignee: AlliedSignal Inc.Inventors: Hang Thanh Pham, Rajiv R. Singh, Addison M. Smith, David P. Wilson, Raymond Hilton Percival Thomas, Gustavo Cerri
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Patent number: 6100229Abstract: The invention relates to novel compositions of 1,1,1,3,3-pentafluoropropane and chlorinated ethylenes and more particularly to azeotrope-like compositions based on these compounds which are useful as solvents in aerosol, refrigeration flushing, oxygen system cleaning and vapor degreasing applications.Type: GrantFiled: October 6, 1998Date of Patent: August 8, 2000Assignee: AlliedSignal Inc.Inventors: Ellen L. Swan, Dennis Michael Lavery
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Patent number: 6080799Abstract: Mixtures containing 50 to 99% by weight of 1,1,1,3,3-pentafluorobutane and 1 to 50% by weight of at least one fluorohydrocarbon selected from 1,1,1,2-tetrafluoroethane, 1,1,1,3,3-pentafluoropropane, 1,1,1,3,3,3-hexafluoropropane, and 1,1,1,2,3,3,3-heptafluoropropane. The mixtures are extremely well suited for use as foaming gases for a blowing agent to produce foamed plastic materials, particularly polyurethane foams. The mixtures are not combustible and exhibit improved insulating properties, particularly when used at low temperatures.Type: GrantFiled: June 16, 1999Date of Patent: June 27, 2000Assignee: Solvay Fluor und Derivate GmbHInventors: Werner Kruecke, Lothar Zipfel
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Patent number: 6053952Abstract: The invention provides dry cleaning liquid formulations and methods for their use based on a highly fluorinated organic solvent which contains at least one hydrogen atom per molecule, in particular, highly fluorinated hydrocarbons or highly fluorinated ethers. In a preferred embodiment the cleaning liquid contains an HFC or HFE in combination with dichloroethylene. The addition of a surfactant enhances the ability of the liquid to remove water-soluble soils.Type: GrantFiled: September 3, 1998Date of Patent: April 25, 2000Assignee: Entropic Systems, Inc.Inventor: Robert Kaiser
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Patent number: 6048833Abstract: This invention provides a solvent composition comprising 1-bromopropane and a decafluoropentane for use as a cleaning and degreasing solvent. Preferably the decafluoropentane consists essentially of 1,1,1,2,3,4,4,5,5,5-decafluoropentane. The solvent composition optionally includes stabilizers and co-solvents such alcohols, ketones, ethers, acetals, nitroalkanes, epoxides and amines. Specific compositions of 1-bromopropane, 1,1,1,2,3,4,4,5,5,5-decafluoropentane and optional stabilizers provide azeotrope compositions that are particularly well suited as cleaning and degreasing solvents.Type: GrantFiled: July 9, 1998Date of Patent: April 11, 2000Assignee: Great Lakes Chemical CorporationInventor: Richard J. DeGroot
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Patent number: 6020299Abstract: Disclosed is a single phase mixture of about 1 to about 99 wt % of a compound having the general formula ##STR1## where "n" is 1 or 2 and about 0.1 to about 99 wt % of a liquid which can be a perfluoro aliphatic alkane from C.sub.5 to C.sub.8, a perfluoro cycloaliphatic alkane from C.sub.5 to C.sub.8, a perfluoro alkylcycloalkane having 5 to 8 carbon atoms in the ring and 1 or 2 branches of 1 to 3 carbon atoms each, a perfluoro-N-alkylmorpholine from C.sub.5 to C.sub.8, a perfluoro cycloether from C.sub.4 to C.sub.7, or a perfluoro polyether having an average molecular weight from about 400 to about 500.Type: GrantFiled: October 27, 1994Date of Patent: February 1, 2000Assignee: Occidental Chemical CorporationInventors: Hang-Chang Bobby Chen, Mark E. Lindrose
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Patent number: RE37938Abstract: The present invention relates to compositions of pentafluoropropane and a fluorinated propane having from 1 to 5 fluorine atoms; a hydrocarbon having from 1 to 5 carbon atoms; 1,1,1,4,4,4-hexafluorobutane, (CF3)2CHCH3, dimethyl ether; or 1,1,1,2,3,4,4,5,5,5-decafluoropentane. The compositions, which may be azeotropic or azeotrope-like, may be used as refrigerants, cleaning agents, expansion agents for polyolefins and polyurethanes, aerosol propellants, refrigerants, heat transfer media, gaseous dielectrics, fire extinguishing agents, power cycle working fluids, polymerization media, particular removal fluids, carrier fluids, buffing abrasive agents or displacement drying agents.Type: GrantFiled: May 26, 1999Date of Patent: December 17, 2002Assignee: E. I. du Pont de Nemours and CompanyInventors: Barbara Haviland Minor, Tuneen E. C. Chisolm