Vaporization, Or Expansion, Refrigeration Or Heat Or Energy Exchange Patents (Class 252/67)
With lubricants, or warning, stabilizing or anti-corrosion agents or persistent gases (Class 252/68)
-
Patent number: 6896823Abstract: The present invention provides compositions comprising pentafluoropropane, a second component selected from the group consisting of decafluoropropane, perfluorobutyl methyl ether and combinations of these, and a third component selected from the group consisting of methanol, 1,2-trans-dichloroethylene and combinations of these. The present invention further provides for refrigerants, blowing agents, foam compositions, polyol premixes, closed-cell foams, sprayable compositions, and the like, comprising the present compositions.Type: GrantFiled: December 17, 2002Date of Patent: May 24, 2005Assignee: Honeywell International Inc.Inventors: Guillermo J. Hitters, Kane D. Cook, Gary M. Knopeck, Hang T. Pham, Ian R. Shankland, Rajiv R. Singh
-
Patent number: 6881354Abstract: Multicomponent refrigerant fluids for generating refrigeration, especially over a wide temperature range including cryogenic temperatures, which are advantageous over conventional refrigerant fluids especially for certain applications, and which are non-toxic, non-flammable and low or non-ozone-depleting and preferably are maintained in variable load form through compression, cooling, expansion and warming steps in a refrigeration cycle.Type: GrantFiled: July 24, 2002Date of Patent: April 19, 2005Assignee: Praxair Technology, Inc.Inventors: Bayram Arman, Neil Mark Prosser, M. Abdul-Aziz Rashad, Henry Edward Howard
-
Patent number: 6875370Abstract: A group of known refrigerants, (R-227ea, R-124, R-134a, R-143a, R-125, R-E125, R-E143a, R-E227ca2, R-254cb, R-600a, R-142b, R-22, R-290, R-E170, R-1270, R-1216, R-218, R-C318, R-C270), that may be combined in novel ways to produce several excellent “drop-in” substitutes for refrigerants R-12 or R-500. The performance of the preferred “drop-in” substitutes for R-12 or R-500 of the present invention often exceeds that of the refrigerant being replaced, while maintaining acceptable oil circulation with existing mineral oils used in R-12 or R-500 refrigeration and air conditioning systems.Type: GrantFiled: March 5, 1996Date of Patent: April 5, 2005Inventor: George H. Goble
-
Patent number: 6863840Abstract: The present invention relates to refrigerants generally, and more specifically to nonflammable, nonozone depleting, mixtures of refrigerants that may be substituted for HCFC-22, R-407C, R-417A, R-502, R-500, CFC-12, R-404A, HFC-134a, and others, and is usable in mineral oil systems. Among the most preferred embodiments of the present invention are mixtures that are substitutes for these refrigerants, comprising about 1 to 85 weight percent R-125, and about 1 to 80 weight percent R-134a, and about 0 to 12 weight percent of R-1270, R-290 or a mixture thereof, and about 1 to 15 weight percent R-E170 and about 0 to 20 weight percent R-227ea, with the weight percentages of the components being weight percentages of the overall mixture.Type: GrantFiled: June 25, 2003Date of Patent: March 8, 2005Inventor: George H. Goble
-
Patent number: 6858571Abstract: Provided are azeotrope-like compositions comprising pentafluoropropene (HFO-1225) and a fluid selected from the group consisting of 3,3,3-trifluoropropene (“HFO-1243zf”), 1,1-difluoroethane (“HFC-152a”), trans-1,3,3,3-tetrafluoropropene (“HFO-1234ze”), and combinations of two or more thereof. Also provided are uses thereof including as refrigerants, blowing agents, sprayable compositions, flame suppressant, and the like.Type: GrantFiled: October 27, 2003Date of Patent: February 22, 2005Assignee: Honeywell International Inc.Inventors: Hang T. Pham, Rajiv R. Singh, David P. Wilson
-
Patent number: 6846792Abstract: 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: December 20, 2002Date of Patent: January 25, 2005Assignee: E. I. du Pont de Nemours and CompanyInventors: Barbara Haviland Minor, Donald Bernard Bivens, Brooks Shawn Lunger
-
Patent number: 6843930Abstract: There is provided a composition of refrigerant mixtures for high back pressure condition, comprising propane, propylene or 1,1-difluoroethane and, optionally, additive selected from the group consisting of carbon dioxide, trifluoromethyl iodide and mixture thereof. The composition according to the present invention is environment-friendly and can be directly drop in the conventional refrigerator system adopting HCFC-22 refrigerant without any systemic change.Type: GrantFiled: September 6, 2001Date of Patent: January 18, 2005Assignee: ACM TechInventor: Seung-Yon Cho
-
Patent number: 6841088Abstract: The present invention relates to refrigerant compositions comprising a fluorocarbon, an oxygenated lubricant, a non-oxygenated lubricant, and a compatibilizer. The present invention further relates to methods for replacing a chlorofluorocarbon or hydrochlorofluorocarbon and a non-oxygenated lubricant composition with a fluorocarbon and an oxygenated lubricant composition in a compression refrigeration system without flushing residual non-oxygenated lubricant from the system.Type: GrantFiled: October 15, 2003Date of Patent: January 11, 2005Assignee: E. I. du Pont de Nemours and CompanyInventor: Barbara Haviland Minor
-
Patent number: 6841087Abstract: A refrigerant composition that can be a substitute for chlorodifluoromethane (HCFC-22) comprises: (a) a first constituent of difluoromethane, (b) a second constituent of 1,1,1-trifluoroethane, (c) a third constituent of 1,1,1,2-tetrafluoroethane, and (d) a fourth constituent selected from the group consisting of 1,1-difluoroethane, 1,1,1,2,3,3,3-heptafluoropropane, 1,1,1,2,3,3-hexafluropropane and butane.Type: GrantFiled: April 19, 2002Date of Patent: January 11, 2005Assignee: Korea Institute of Science and TechnologyInventors: Byung-Gwon Lee, Jong-Sung Lim, Byoung Sung Ahn, Kun You Park, Chang-Nyeon Kim
-
Patent number: 6835321Abstract: This invention relates to compositions that include at least one fluoroether and at least one hydrofluorocarbon. Included in this invention are compositions of a cyclic or acyclic hydrofluoroether of the formula CaFbH2a+2−bOc wherein a=2 or 3 and 3≦b≦8 and c=1 or 2 and a hydrofluorocarbon of the formula CnFmH2n+2−m wherein 1≦n≦4 and 1≦m≦8. Such compositions may be used as refrigerants, cleaning agents, expansion agents for polyolefins and polyurethanes, aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing agents, power cycle working fluids, polymerization media, particulate removal fluids, carrier fluids, buffing abrasive agents, and displacement drying agents.Type: GrantFiled: June 5, 2003Date of Patent: December 28, 2004Assignee: E. I. du Pont de Nemours and CompanyInventors: Diana Lynn Klug, Barbara Haviland Minor, Donna Marie Patron, Allen Capron Sievert
-
Publication number: 20040250550Abstract: A material that can be used for magnetic refrigeration, wherein the material substantially has the general formula (AYB1−y)2+&dgr;C1−xDx) wherein A is selected from Mn and Co; B is selected from Fe and Cr; C and D are different and are selected from P, As, B, Se, Ge, Si and Sb; x and y each is a number in the range 0-1; and &dgr; is a number from (−0.1)-(+0.1).Type: ApplicationFiled: January 30, 2004Publication date: December 16, 2004Applicants: Stichting voor de Technische Wetenschappen, Universiteit van Amstserdam, faculteit der Natuurwetenschappen, Wiskunde en InformaaticaInventors: Ekkehard Hubertus Bruck, Ojiyed Tegusi, Frank Roelof De Boer
-
Patent number: 6830703Abstract: This invention relates to compositions that include at least one fluoroether and at least one hydrofluorocarbon. Included in this invention are compositions of a cyclic or acyclic hydrofluoroether of the formula CaFbH2a+2−bOc wherein a=2 or 3 and 3≦b≦8 and c=1 or 2 and a hydrofluorocarbon of the formula CnFmH2n+2−m wherein 1≦n≦4 and 1≦m≦8. Such compositions may be used as refrigerants, cleaning agents, expansion agents for polyolefins and polyurethanes, aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing agents, power cycle working fluids, polymerization media, particulate removal fluids, carrier fluids, buffing abrasive agents, and displacement drying agents.Type: GrantFiled: June 5, 2003Date of Patent: December 14, 2004Assignee: E. I. du Pont de Nemours and CompanyInventors: Diana Lynn Klug, Barbara Haviland Minor, Donna Marie Patron, Tuneen Chisolm-Carter, Allen Capron Sievert
-
Publication number: 20040231338Abstract: The magnetic composite material of the present invention is used as a working substance in the magnetic refrigeration system and comprising at least two phases, including, a first phase composed of an intermetallic compound represented by a general formula: La(Fe(Co, Ni)Si)13, having an NaZn13 type crystal structure, and a second phase is composed of an iron alloy containing Si. The first phase is precipitated in an expansion size of 100 &mgr;m or less in average. Preferably, the magnetic composite material contains Fe as a principal component, La in an amount from 4 atomic % to 12 atomic %, Si in an amount from 2 atomic % to 21 atomic %, and Co and Ni in a total amount from 0 atomic % to 11 atomic %, and the total amount of Fe, Co and Ni being from 75 atomic % to 92 atomic %.Type: ApplicationFiled: March 25, 2004Publication date: November 25, 2004Inventors: Akiko Saito, Tadahiko Kobayashi
-
Publication number: 20040226303Abstract: The use of 1,1,1,3,3-pentafluorobutane (R365mfc) as refrigerant in turbocompressor cooling systems, which, due to their construction, can achieve high outputs with a small space and material requirement. Such systems used in high-performance commercial and industrial refrigeration units.Type: ApplicationFiled: February 23, 2004Publication date: November 18, 2004Applicant: Solvay Pharmaceuticals GmbHInventors: Peter Jannick, Christoph Meurer
-
Publication number: 20040221587Abstract: Embodiments of the present invention disclose methods for producing pre-conditioned solutes that exhibit no temperature spike during super-cooling in a cryogenic process. In addition, the solutes demonstrate utile capabilities and characteristics such as more efficient heat absorption rates and eutectic material properties which make the pre-conditioned solutes an efficient heat exchange medium. The methods involve super-cooling a solute to induce a long-duration phase change capability. The pre-conditioned solute may be thawed and will retain long-duration phase change capabilities for subsequent freezing cycles if the freezing protocols disclosed herein are followed. Material to be frozen may be directly immersed into pre-conditioned, super-cooled solutes for freezing. The solute may be propylene glycol, glycerol, or other suitable solutes.Type: ApplicationFiled: November 25, 2003Publication date: November 11, 2004Inventors: Allan J. Cassell, Brian Wood
-
Patent number: 6814884Abstract: A method of using mixtures consisting essentially of 1,1,1,3,3-pentafluorobutane (R365mfc) and at least one further partially fluorinated hydrocarbon selected from the group consisting of 1,1,1,2-tetrafluoroethane (R134a), pentafluoroethane (R125), 1,1,1,3,3-pentafluoropropane (R245fa) and 1,1,1,2,3,3,3-heptafluoropropane (R227ea) as the working fluid in high-temperature heat pumps. The refrigerant mixtures used according to the invention exhibit a high temperature glide.Type: GrantFiled: May 15, 2003Date of Patent: November 9, 2004Assignee: Solvay Fluor und Derivate GmbHInventors: Peter Jannick, Christoph Meurer
-
Publication number: 20040206930Abstract: A process for manufacturing a liquid evaporation retardant product that combines isopropanol-water azeotrope with up to 5% octadecanol by weight of the total solution, and upon which improved capability to remain precipitate free in the event of colder temperatures than normal is conferred by adding n-butanol at 10% by weight of the pre-made basic product.Type: ApplicationFiled: May 13, 2002Publication date: October 21, 2004Inventor: Robert N. O'Brien
-
Patent number: 6806247Abstract: 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: GrantFiled: June 10, 2002Date of Patent: October 19, 2004Assignee: Honeywell International Inc.Inventors: Mary C. Bogdan, Hang T. Pham, David J. Williams, Gary M. Knopeck, Rajiv R. Singh, Kane D. Cook
-
Publication number: 20040200992Abstract: An apparatus and method wherein ozone layer-damaging dichlorodifluoromethane is substituted with a mix of less environmentally damaging refrigerants chlorodifluoroethane and tetrafluoroethane in dichlorodifluoromethane-based air-cooling systems. While less environmentally damaging than dichlorodifluoromethane, the substitute refrigerant has a temperature-pressure relationship similar to that of dichlorodifluoromethane, making the substitute refrigerant suitable for use with dichlorodifluoromethane-based air-cooling systems. The substitute refrigerant can be used alone or in combination with dichlorodifluoromethane. In either event, it is mixed with a relatively small percentage of a hydrophobic lubricating oil which is compatible with both the substitute refrigerant and with dichlorodifluoromethane.Type: ApplicationFiled: May 5, 2004Publication date: October 14, 2004Inventor: Harrison M. Weber
-
Patent number: 6800216Abstract: A refrigerant composition that can be a substitute for chlorodifluoromethane (HCFC-22) comprises: (a) a first constituent of difluoromethane, (b) a second constituent of 1,1,1-trifluoroethane, (c) a third constituent of 1,1,1,2,3,3,3-heptafluoropropane and (d) a fourth constituent selected from the group consisting of isobutane, 1,1,1,2,3,3-hexafluropropane and butane; or comprises: (a) a first constituent of difluoromethane, (b) a second constituent of 1,1,1,2-tetrafluoroethane, (c) a third constituent of 1,1,-difluoroethane, and (d) a fourth constituent selected from the group consisting of 1,1,1,2,3,3,3-heptafluoropropane, 1,1,1,2,3,3-hexafluropropane and butane.Type: GrantFiled: July 24, 2002Date of Patent: October 5, 2004Assignee: Korea Institute of Science and TechnologyInventors: Byung-Gwon Lee, Jong-Sung Lim, Hoon Sik Kim, Chang-Nyeon Kim
-
Patent number: 6783691Abstract: The present invention relates to azeotrope-like compression refrigerant compositions consisting essentially of difluoromethane (HFC-32), pentafluoroethane (HFC-125), 1,1,1,2-tetrafluoroethane (HFC-134a) and 0.5-5 weight percent of a hydrocarbon selected from the group consisting of: n-butane; isobutane; n-butane and 2-methylbutane; n-butane and n-pentane; isobutane and 2-methylbutane; and isobutane and n-pentane.Type: GrantFiled: March 20, 2000Date of Patent: August 31, 2004Assignee: E.I. du Pont de Nemours and CompanyInventors: Donald Bernard Bivens, Barbara Haviland Minor, Akimichi Yokozeki
-
Patent number: 6784150Abstract: Disclosed are compositions comprising 1,1,1,3,3-pentafluoropropane, 1,1,1,3,3-pentafluorobutane and water, said compositions are environmentally desirable for use as blowing agents for polymer foam, refrigerants, aerosol propellants, metered dose inhalers, heat transfer media, and gaseous dielectrics.Type: GrantFiled: April 16, 2002Date of Patent: August 31, 2004Assignee: Honeywell International Inc.Inventors: Mary C. Bogdan, Hang T. Pham, David J. Williams, Leslie Bement, Ronald Riegel, Rajiv R. Singh, Kane D. Cook, Gary M. Knopeck
-
Patent number: 6776922Abstract: A refrigerant composition that can be a substitute for chlorodifluoromethane (HCFC-22) comprises: (a) a first constituent of difluoromethane, (b) a second constituent of 1,1,1-trifluoroethane, (c) a third constituent of 1,1-difluoroethane, and (d) a fourth constituent selected from the group consisting of 1,1,1,2,3,3,3-heptafluoropropane, isobutane, 1,1,1,2,3,3-hexafluropropane and butane.Type: GrantFiled: July 24, 2002Date of Patent: August 17, 2004Assignee: Korea Institute of Science and TechnologyInventors: Byung-Gwon Lee, Jong-Sung Lim, Sang Deuk Lee, Chang-Nyeon Kim
-
Publication number: 20040149954Abstract: This invention relates to compositions of cyclopentane, and a compound selected from the group consisting of hydrofluorocarbons, hydrofluoroethers, or fluorinated sulfur compounds. Specifically these compounds may be selected from the group consisting of tetrafluoroethane, hexafluoropropane, pentafluoropropane, tetrafluoropropane, trifluoropropane, difluoropropane, octafluorobutane, hexafluorobutane, pentafluorobutane, nonafluorobutane, difluorobutane, trifluoro-2-methoxyethane and bis(pentafluoroethyl)sulfide.Type: ApplicationFiled: December 16, 2003Publication date: August 5, 2004Inventor: Barbara Haviland Minor
-
Patent number: 6770614Abstract: Precision cleaning compositions for electronic and electrical components comprise at least one halogenated, saturated or unsaturated hydrocarbon other than cis-1,2-dichloroethylene; at least one fluorinated saturated or unsaturated hydrocarbon having the formula CnHmFp, wherein 3≦n≦6, 0≦m≦9 and p≧5; at least one fluorinated saturated or unsaturated ether having the formula CaHbOcFd, wherein 3≦a≦6, 0≦b≦9, c≧1, and d≧5; methylal; at least one simple alcohol; and optionally at least one propellant. In a preferred embodiment, the composition comprises trans-1,2-dichloroethylene, methylal, methyl nonafluorobutyl ether, ethyl nonafluoroisobutyl ether and carbon dioxide. The cleaning compositions are environmentally friendly (non-ozone depleting), are strong enough to tackle tough soils yet mild enough for use on plastic components, are non-flammable, have no flash point, and leave no residue on the substrate.Type: GrantFiled: June 3, 2002Date of Patent: August 3, 2004Assignee: CRC Industries, Inc.Inventors: Richard L. Miller, Melodee A. Nemeth
-
Patent number: 6758987Abstract: An apparatus and method wherein ozone layer-damaging dichlorodifluoromethane is substituted with a mix of less environmentally damaging refrigerants chlorodifluoroethane and tetrafluoroethane in dichlorodifluoromethane-based air-cooling systems. While less environmentally damaging than dichlorodifluoromethane, the substitute refrigerant has a temperature-pressure relationship similar to that of dichlorodifluoromethane, making the substitute refrigerant suitable for use with dichlorodifluoromethane-based air-cooling systems. The substitute refrigerant can be used alone or in combination with dichlorodifluoromethane. In either event, it is mixed with a relatively small percentage of a hydrophobic lubricating oil which is compatible with both the substitute refrigerant and with dichlorodifluoromethane.Type: GrantFiled: May 20, 2003Date of Patent: July 6, 2004Inventor: Harrison M. Weber, III
-
Patent number: 6758988Abstract: Anti-corrosion solutions and processes useful for refrigeration processes are disclosed. Heteropoly complex anions of transitional metal elements can be added to an absorption solution which includes aqueous ammonia, alkali metal hydroxide and/or alkaline earth metal hydroxide, optionally in combination with transition metal compounds or compounds of the metallic elements of Groups IIIa to VIa of the Periodic Table of Elements to minimize corrosion of systems within which the solution is used.Type: GrantFiled: September 6, 2000Date of Patent: July 6, 2004Assignee: FMC CorporationInventors: Shyam Kumar Verma, George Robert Sandor
-
Publication number: 20040124394Abstract: Methods and apparatus for a refrigeration heat exchanger section useful in circulating a substantially non-HCFC refrigerant mixture which comprises: a compressor means, an auxiliary condenser, a first condenser, a second condenser, a third condenser, a subcooler and a liquid/gas separator, wherein a subcooled refrigerant liquid mixture taken as bottoms from the liquid/gas separator is distributed and expanded by a first expansion means and a second expansion means to form first and second expanded streams, respectively, such that the first expanded stream is returned to the auxiliary condenser and compressor in order to avoid overheating of the compressor.Type: ApplicationFiled: October 10, 2003Publication date: July 1, 2004Inventor: Chuan Weng
-
Publication number: 20040123608Abstract: A safe having a good coefficient of performance is provided, and a refrigerating cycle and a refrigerating device in which the non-azeotropic refrigerant mixture is circulated are also provided. The non-azeotropic refrigerant mixture comprises a carbon dioxide and at least one kind of combustible refrigerants, and has a temperature glide. The refrigerating cycle, in which a compressor, a heat radiator, an expansion mechanism and an evaporator are connected by a refrigerant path, is characterized in that the above non-azeotropic refrigerant mixture is circuited in the refrigerating cycle. In addition, a refrigerating device comprises the above refrigerating cycle and a plurality of the evaporators, wherein an evaporator for use in a low temperature and an evaporator for use in a high temperature higher than the low temperature are arranged in series.Type: ApplicationFiled: December 11, 2003Publication date: July 1, 2004Inventors: Ichiro Kamimura, Noriyuki Tsuda, Kenzo Matsumoto, Toru Kawabata, Masato Watanabe, Takashi Yoshizawa, Hiroshi Mukaiyama, Ryoko Kubo
-
Publication number: 20040118134Abstract: A refrigerating device is provided in which a compressor, a gas cooler, an expansion mechanism and an evaporator are sequentially connected by using refrigerant pipes. The refrigerating device uses a refrigerant mixture in which a combustible nature refrigerant and a carbon dioxide refrigerant are mixed, and an amount of the carbon dioxide refrigerant in the mixture refrigerant is 20 to 50 mass %. Alternatively, a maximum fill amount of the combustible nature refrigerant is 150 g. Therefore, the refrigerating device has a higher coefficient of performance, a high refrigerating capacity and its safety is higher than that of using only hydrocarbon refrigerant.Type: ApplicationFiled: December 4, 2003Publication date: June 24, 2004Inventors: Kenzo Matsumoto, Noriyuki Tsuda, Ichiro Kamimura, Toru Kawabata, Masato Watanabe, Takashi Yoshizawa, Hiroshi Mukaiyama, Ryoko Kubo
-
Patent number: 6753356Abstract: Use as foaming agents having a low environmental impact of azeotropic or near azeotropic compositions using difluoromethoxy-bis(difluoromethyl ether) and/or 1-difluoromethoxy-1,1,2,2-tetrafluoroethyl difluoromethyl ether.Type: GrantFiled: August 16, 1999Date of Patent: June 22, 2004Assignee: Ausimont S.p.A.Inventors: Ezio Musso, Giampiero Basile, Sauro Girolomoni
-
Publication number: 20040107708Abstract: The development of an alternate refrigerant composition which is free from a possibility of causing depletion of the ozone layer and capable of maintaining the performance of a conventional refrigerating circuit without modifying the circuit is desired. An object of the present invention is to provide such a refrigerant composition and a refrigerating circuit using the refrigerant composition. A refrigerant composition of the present invention comprises R245fa (CF3CH2CHF2), R125 (CHF2CF3), R508A (R23/R116:39/61) and R14 (tetrafluoromethane: CF4). Thus, the refrigerant composition has no possibility of causing depletion of the ozone layer. Further, since the composition is noncombustible, possible combustion can be prevented even if it leaks.Type: ApplicationFiled: September 10, 2003Publication date: June 10, 2004Applicants: SANYO ELECTRIC CO., LTD., SANYO ELECTRIC BIOMEDICAL CO., LTD.Inventor: Jiro Yuzawa
-
Publication number: 20040108487Abstract: The present invention relates to refrigerant compositions comprising a fluorocarbon, an oxygenated lubricant, a non-oxygenated lubricant, and a compatibilizer.Type: ApplicationFiled: October 15, 2003Publication date: June 10, 2004Inventor: Barbara Haviland Minor
-
Patent number: 6743765Abstract: Compositions comprising 1,1,1,3,3-pentafluorobutane and more than 5% by weight of at least one non-flammable fluoro compound, and use thereof.Type: GrantFiled: October 22, 2003Date of Patent: June 1, 2004Assignee: Solvay (Societe Anonyme)Inventors: Pierre Dournel, Pierre Barthelemy
-
Patent number: 6742345Abstract: A temperature control system is described for producing and maintaining temperatures in a pre-defined space within a pre-defined temperature range. A working fluid comprising an aqueous solution of 1-3 propanediol is circulated through a heat transfer system in thermal communication with both the working fluid and the pre-defined space to produce and maintain the temperature in the pre-defined space that is within the pre-defined temperature range.Type: GrantFiled: March 27, 2002Date of Patent: June 1, 2004Assignee: The Penray Companies, Inc.Inventor: Richard P. Carr
-
Publication number: 20040089839Abstract: Liquid compositions for use in compression refrigeration, air-conditioning and heat pump systems in which a fluoroalkene containing from 3 to 4 carbon atoms and at least 1 but no more than 2 double bonds is combined with an effective amount to provide lubrication of an essentially miscible organic lubricant comprised of carbon, hydrogen and oxygen and having a ratio of oxygen to carbon effective to provide a degree of miscibility with said fluoroalkene so that when up to five weight percent of lubricant is added to said fluoroalkene the refrigerant has one liquid phase at at least one temperature between −40 and +70° C. Methods for producing refrigeration and heating with the fluoroalkenes, alone or in combination with the disclosed lubricants, are also disclosed.Type: ApplicationFiled: October 27, 2003Publication date: May 13, 2004Applicant: Honeywell International, Inc.Inventors: Raymond H. Thomas, Rajiv R. Singh
-
Patent number: 6722145Abstract: The present invention is a refrigeration system that uses a nonflammable, nonchlorinated refrigerant mixture to achieve very-low temperatures using a single compressor. The system is characterized by both high efficiency and rapid cool down time.Type: GrantFiled: December 10, 2002Date of Patent: April 20, 2004Assignee: IGC-Polycold Systems, Inc.Inventors: Oleg Podtchereniaev, Kevin Flynn, Tarrurisa Apparao, Mikhail Bolarski
-
Publication number: 20040069970Abstract: The present invention relates to refrigerants generally, and more specifically to nonflammable, nonozone depleting, mixtures of refrigerants that may be substituted for HCFC-22, R-407C, R-417A, R-502, R-500, CFC-12, R-404A, HFC-134a, and others, and is usable in mineral oil systems. Among the most preferred embodiments of the present invention are mixtures that are substitutes for these refrigerants, comprising about 1 to 85 weight percent R-125, and about 1 to 80 weight percent R-134a, and about 0 to 12 weight percent of R-1270, R-290 or a mixture thereof, and about 1 to 15 weight percent R-E170 and about 0 to 20 weight percent R-227ea, with the weight percentages of the components being weight percentages of the overall mixture.Type: ApplicationFiled: June 25, 2003Publication date: April 15, 2004Inventor: George H. Goble
-
Publication number: 20040061091Abstract: A refrigerant blend to replace refrigerant R-22 (chlorodifluoromethane) in refrigeration systems designed to use R-22 as the refrigerating fluid. The inventive refrigerant blend comprises R-134a (1,1,1,2-tetrafluoroethane), R-125 (pentafluoroethane), a hydrocarbon component, and, optionally, R-32 (difluoromethane). The hydrocarbon component comprises at least two hydrocarbons having boiling points that bracket the boiling point of R-134a (−15° F., −26° C.). The hydrocarbons in one group, designated as Group A, have boiling points lower than the boiling point of R-134a. The hydrocarbons in the other group, designated Group B, have boiling points higher than that of R-134a.Type: ApplicationFiled: September 26, 2003Publication date: April 1, 2004Inventor: James B. Tieken
-
Publication number: 20040041122Abstract: The present invention relates to refrigerant compositions comprising a fluorocarbon, an oxygenated lubricant, a non-oxygenated lubricant, and a compatibilizer.Type: ApplicationFiled: June 9, 2003Publication date: March 4, 2004Inventor: Barbara Haviland Minor
-
Patent number: 6695973Abstract: Near-azeotropic ternary compositions of hydrofluorocarbons with n-butane or isobutane selected from: A) 1,1,1,2-tetrafluoroethane (R134a) 65-94% by weight pentafluoroethane (R125) 2-25% by weight n-butane (R600) and/or isobutane (R-600a) 1-10% by weight B) 1,1,1,2-tetrafluoroethane (R134a) 65-94% by weight 1,1,1,2,3,3,3-heptafluoropropane (R227ea) 5-25% by weight n-butane (R600) and/or isobutane (R-600a) 1-10% by weight Said compositions have zero ODP, very low GWP and good solvent power for mineral lubricants. They are utilizable as drop-in substituents of R-12 in domestic refrigeration.Type: GrantFiled: December 17, 1996Date of Patent: February 24, 2004Assignee: Solvay Solexis S.p.A.Inventors: Ezio Musso, Sauro Girolomoni, Giampiero Basile
-
Patent number: 6692653Abstract: The present invention relates to a refrigerant composition of four-constituent system, comprising: (a) a first constituent of difluoromethane, (b) a second constituent of 1,1,1,2,3,3,3-heptafluoropropane, (c) a third constituent selected from the group consisting of 1,1,1,2-tetrafluoroethane and 1,1-difluoroethane and (d) a for the constituent selected from the group consisting of isobutane, 1,1,1,2,3,3,-hexafluoropropane and butane, useful as a substitute for chlorodifluoromethane (HCFC-22).Type: GrantFiled: February 13, 2002Date of Patent: February 17, 2004Assignee: Korea Institute of Science and TechnologyInventors: Byung-Gwon Lee, Jong-Sung Lim, Hong-Gon Kim, Chang-Nyeon Kim
-
Publication number: 20040026655Abstract: A refrigerant comprising:Type: ApplicationFiled: March 18, 2003Publication date: February 12, 2004Applicant: REFRIGERANT PRODUCTS LTD.Inventors: John Edward Poole, Richard Powell, James Victor Thomas
-
Patent number: 6688118Abstract: This invention relates to compositions of cyclopentane, and a compound selected from the group consisting of hydrofluorocarbons, hydrofluoroethers, or fluorinated sulfur compounds. Specifically these compounds may be selected from the group consisting of tetrafluoroethane, hexafluoropropane, pentafluoropropane, tetrafluoropropane, trifluoropropane, difluoropropane, octafluorobutane, hexafluorobutane, pentafluorobutane, nonafluorobutane, difluorobutane, trifluoro-2-methoxyethane and bis(pentafluoroethyl)sulfide. 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, particulate removal fluids, carrier fluids, buffing abrasive agents or displacement drying agents.Type: GrantFiled: March 1, 1996Date of Patent: February 10, 2004Assignee: E. I. du Pont de Nemours and CompanyInventor: Barbara Haviland Minor
-
Publication number: 20040016903Abstract: A refrigerant composition that can be a substitute for chlorodifluoromethane (HCFC-22) comprises: (a) a first constituent of difluoromethane, (b) a second constituent of 1,1,1-trifluoroethane, (c) a third constituent of 1,1-difluoroethane, and (d) a fourth constituent selected from the group consisting of 1,1,1,2,3,3,3-heptafluoropropane, isobutane, 1,1,1,2,3,3-hexafluropropane and butane.Type: ApplicationFiled: July 24, 2002Publication date: January 29, 2004Applicant: Korea Institute of Science and TechnologyInventors: Byung-Gwon Lee, Jong-Sung Lim, Sang Deuk Lee, Chang-Nyeon Kim
-
Publication number: 20040016902Abstract: A refrigerant composition that can be a substitute for chlorodifluoromethane (HCFC-22) comprises: (a) a first constituent of difluoromethane, (b) a second constituent of 1,1,1-trifluoroethane, (c) a third constituent of 1,1,1,2,3,3,3-heptafluoropropane and (d) a fourth constituent selected from the group consisting of isobutane, 1,1,1,2,3,3-hexafluropropane and butane; or comprises: (a) a first constituent of difluoromethane, (b) a second constituent of 1,1,1,2-tetrafluoroethane, (c) a third constituent of 1,1,-difluoroethane, and (d) a fourth constituent selected from the group consisting of 1,1,1,2,3,3,3-heptafluoropropane, 1,1,1,2,3,3-hexafluropropane and butane.Type: ApplicationFiled: July 24, 2002Publication date: January 29, 2004Applicant: Korea Institute of Science and TechnologyInventors: Byung-Gwon Lee, Jong-Sung Lim, Hoon Sik Kim, Chang-Nyeon Kim
-
Publication number: 20040013610Abstract: Composition comprising at least one hydrofluoroalkane and at least one fluoropolyether.Type: ApplicationFiled: May 7, 2003Publication date: January 22, 2004Inventor: Pierre Dournel
-
Patent number: 6673259Abstract: Disclosed are azeotrope-like compositions comprising 1,1,1,3,3-pentafluoropropane and at least one C3 or C4 hydrocarbon, and optionally water, 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: GrantFiled: April 12, 2002Date of Patent: January 6, 2004Assignee: Honeywell International Inc.Inventors: Kane D. Cook, Rajiv R. Singh, Gary M. Knopeck, Mary C. Bogdan, Hang T. Pham, Leslie Bement, David J. Williams, James M. Bowman
-
Patent number: 6669862Abstract: A refrigerant composition comprises a mixture of three HFC (hydrofluorocarbons) refrigerants, namely, HFC 32, HFC 125 and HFC 134a. A lower alkyl alcohol such as ethanol is included in the mixture to improve miscibility in commonly-used lubricants such as mineral oil by altering the viscosity of the entrained oil within the operating air-conditioning system. Optionally, a fifth component made be added, namely a hydrocarbon based refrigerant such as iso-butane or propane, to further improve characteristics of refrigerant. The resulting refrigerant is similar in characteristics to R22, and is compatible with existing air-conditioning and refrigeration devices originally for use with R22 refrigerant without system modifications.Type: GrantFiled: January 17, 2003Date of Patent: December 30, 2003Assignee: Protocol Resource Management Inc.Inventor: James W. Flowers
-
Publication number: 20030234380Abstract: Provided are compositions comprising HFC-245fa and trans-1,2-dichloroethylene which exhibit relatively high solubility with conventional hydrocarbon lubricants, non-flammability, and relatively constant boiling points. Also provided are uses of such compositions.Type: ApplicationFiled: March 14, 2003Publication date: December 25, 2003Inventors: Gary M. Knopeck, Rajiv R. Singh, Ian Shankland