EP0648253A1 - Melanges de pentafluoroethane et de trifluoroethane - Google Patents

Melanges de pentafluoroethane et de trifluoroethane

Info

Publication number
EP0648253A1
EP0648253A1 EP93915364A EP93915364A EP0648253A1 EP 0648253 A1 EP0648253 A1 EP 0648253A1 EP 93915364 A EP93915364 A EP 93915364A EP 93915364 A EP93915364 A EP 93915364A EP 0648253 A1 EP0648253 A1 EP 0648253A1
Authority
EP
European Patent Office
Prior art keywords
compositions
weight percent
pentafluoroethane
trifluoroethane
azeotropic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP93915364A
Other languages
German (de)
English (en)
Inventor
Donald Bernard Bivens
Akimichi Yokozeki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of EP0648253A1 publication Critical patent/EP0648253A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00—Materials not provided for elsewhere
    • C09K3/30—Materials not provided for elsewhere for aerosols
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C19/00—Acyclic saturated compounds containing halogen atoms
    • C07C19/08—Acyclic saturated compounds containing halogen atoms containing fluorine
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
    • C09K5/02—Materials undergoing a change of physical state when used
    • C09K5/04—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa
    • C09K5/041—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems
    • C09K5/044—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems comprising halogenated compounds
    • C09K5/045—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems comprising halogenated compounds containing only fluorine as halogen
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
    • C09K2205/22—All components of a mixture being fluoro compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
    • C09K2205/32—The mixture being azeotropic

Definitions

  • This invention relates to azeotropic compositions of pentafluoroethane and 1,1,1-trifluoroethane.
  • chlorofluoro- carbons have come under scientific scrutiny, because it has been postulated that these materials because of their high stability are able to reach the stratosphere where under the influence of ultraviolet radiation release chlorine atoms which, in turn, undergo chemical reaction in the stratospheric ozone. Reduction of stratospheric ozone would increase the amount of ultraviolet radiation reaching the earth's surface.
  • the present invention is directed to azeotropic compositions consisting essentially of about 5-45 weight percent, preferably about 4045 weight percent, pentafluoroethane, and 55-95 weight percent, preferably about 55-60 weight percent, 1,1,1-trifluoroethane, said composition boils at -16.9° C at about 51 psia.
  • novel compositions of the present invention exhibit lower vapor pressures than either of its two fluorocarbon constituents.
  • the compositions described herein resist component segregation which would seriously diminish their usefulness in the contemplated applications.
  • the substantially constant boiling azeotropic compositions are especially useful as refrigerants, heating applications, aerosol propellants, gaseous dielectrics, fire extmguishing agents, expansion agents for polyolefins and polyurethanes and as power cycle working fluids.
  • novel azeotropic compositions of the present invention exhibit dew and bubble points with small pressure differentials.
  • the difference between dew point and bubble point pressures is an indication of the constant boiling or azeotropic behavior of mixtures.
  • the pressure differentials demonstrated by the substantially constant boiling compositions of the present invention are very small when compared with those of several known nonazeotropic, binary compositions.
  • compositions which contain the same components as the true azeotrope, which not only will exhibit substantially equivalent properties as the true azeotrope for refrigerant and other applications but which will also exhibit substantially equivalent properties to the true azeotropic compositions in terms of constant boiling characteristics or tendency not to segregate or fractionate on boiling at other temperatures and pressures.
  • Additives that are frequently incorporated in fluorocarbon compositions that can be added to the present compositions include lubricants, corrosion inhibitors, stabilizers and dyes.
  • novel substantially constant boiling azeotropic compositions of this invention are also useful as aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing agents, expansion agents for polyolefins and polyurethanes and as power cycle working fluids.
  • the fluorocarbon compositions described herein can be used to produce refrigeration by condensing the constant boiling azeotropic compositions and thereafter evaporating the compositions, e.g., condensate, in the vicinity of a body to be cooled. Further, these fluorocarbon compositions described herein can also be used to produce heat by condensing the constant boiling azeotropic compositions in the vicinity of a body to be heated and thereafter evaporating the compositions.
  • substantially constant boiling azeotropic compositions of this invention eliminates the problem of component fractionation and handling in system operations because fluorocarbon compositions behave substantially as a single substance.
  • the fluorocarbon compositions of the present invention have zero ozone depletion potentials compared with Refrigerant 502, which has a 0.25 ozone depletion potential.
  • EXAMPLE 2 Mixtures of from 5-45 weight percent pentafluoroethane (HFC- 125) and 55-95 weight percent 1,1,1-trifluoroethane are prepared and the vapor pressure at -16.9° C and 30° C is measured. The pressures generated by the compositions are given below in Table 2.
  • novel azeotropic compositions of the instant invention constituting a rather broad range of compositions and exhibit dew and bubble points with virtually no pressure differentials.
  • the difference between dew point and bubble point pressures is an indication of the azeotrope-like behavior of mixtures.
  • the pressure differentials demonstrated by the azeotropic mixtures of the instant invention are very small when compared with those of several known nonazeotropic, binary compositions, namely, (50+50) weight percent mixtures of pentafluoroethane (HFC-125) and 1,1,1,2- tetrafluoroethane (HFC- 134a) and chlorodifluoromethane (HCFC-22) and 1- chloro-l,l-difluoroethane (HCFC-142b), respectively, illustrated below.
  • HFC-125 pentafluoroethane
  • HFC- 134a 1,1,1,2- tetrafluoroethane
  • HCFC-22 chlorodifluoromethane
  • HCFC-142b 1- chloro-l,l-difluoroethane
  • Net refrigeration effect is intended to mean the change in enthalpy of the refrigerant in the evaporator, i.e., the heat removed by the refrigerant in the evaporator.
  • Coefficient of performance is intended to mean the ratio of the net refrigeration effect to the compressor work. It is a measure of refrigerant energy efficiency.
  • the COP of the HFC-125/HFC-143a azeotrope in the amounts shown in Table 4 is similar to the COP of Refrigerant 502, the industry refrigerant standard, and better than that of pentafluoroethane (HFC-125).
  • azeotropic compositions can also be used, with Uttle or no modification to existing refrigeration equipment, which was designed originally for Refrigerant 502 use.
  • the present invention also provides compositions which surprisingly also have refrigeration characteristics substantially better than that of pentafluoroethane (HFC-125), the refrigerant currently recognized by the industry as the most plausible substitute for Refrigerant 502.
  • the novel azeotropic mixtures have zero ozone depletion potentials compared with Refrigerant 502, which has a 0.25 ozone depletion potential.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Thermal Sciences (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Detergent Compositions (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

Cette invention concerne des compositions azéotropes contenant de 5 à 45 % en poids de pentafluoroéthane et de 55 à 95 % en poids de 1,1,1-trifluoroéthane, ces compositions se portant à ébullition à -16,9 °C et à une pression d'environ 51 psia. Ces compositions sont utiles comme réfrigérants, propulseurs d'aérosols, milieux de transfert de chaleur, diélectriques gazeux, agents d'extinction des incendies, agents de dilatation pour polyoléfines et polyuréthanes et comme fluides de travail produisant une force.
EP93915364A 1992-06-29 1993-06-22 Melanges de pentafluoroethane et de trifluoroethane Withdrawn EP0648253A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US905424 1986-09-10
US90542492A 1992-06-29 1992-06-29
PCT/US1993/005721 WO1994000528A1 (fr) 1992-06-29 1993-06-22 Melanges de pentafluoroethane et de trifluoroethane

Publications (1)

Publication Number Publication Date
EP0648253A1 true EP0648253A1 (fr) 1995-04-19

Family

ID=25420789

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93915364A Withdrawn EP0648253A1 (fr) 1992-06-29 1993-06-22 Melanges de pentafluoroethane et de trifluoroethane

Country Status (8)

Country Link
EP (1) EP0648253A1 (fr)
JP (1) JPH07508519A (fr)
AU (1) AU4537293A (fr)
BR (1) BR9306782A (fr)
CA (1) CA2138249A1 (fr)
MX (1) MX9303872A (fr)
RU (1) RU94046275A (fr)
WO (1) WO1994000528A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE344324T1 (de) * 1993-09-14 2006-11-15 Imp Innovations Ltd Eotaxin = eosinophil chemotaktisches cytokin
BR9509790A (pt) * 1994-11-17 1997-11-18 Exxon Chemical Patents Inc Composições fluidas de trabalho de refrigeração para uso em sistemas de resfriamento tipo recompressão
WO1996023752A1 (fr) * 1995-02-01 1996-08-08 E.I. Du Pont De Nemours And Company SEPARATION ET ELIMINATION DES IMPURETES DE 1,1,1-TRIFLUOROETHANE (HFC-143a) PAR DISTILLATION EXTRACTIVE
CN1233781C (zh) * 2003-11-12 2005-12-28 浙江蓝天环保高科技股份有限公司 一种替代r502的环保型制冷剂

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4943388A (en) * 1989-06-28 1990-07-24 Allied-Signal Inc. Azeotrope-like compositions of pentafluoroethane; 1,1,1-trifluoroethane; and chlorodifluoromethane
DE69126219T2 (de) * 1990-07-26 1997-12-11 Du Pont Quasi-Azeotrope Mischungen zur Verwendung als Kältemittel
JPH06281272A (ja) * 1991-07-08 1994-10-07 Daikin Ind Ltd 最高共沸混合物および共沸様混合物
JPH0517750A (ja) * 1991-07-12 1993-01-26 Matsushita Electric Ind Co Ltd 作動流体

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9400528A1 *

Also Published As

Publication number Publication date
WO1994000528A1 (fr) 1994-01-06
CA2138249A1 (fr) 1994-01-06
AU4537293A (en) 1994-01-24
BR9306782A (pt) 1998-12-08
MX9303872A (es) 1993-12-01
RU94046275A (ru) 1996-09-27
JPH07508519A (ja) 1995-09-21

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