Azeotrope-like compositions of 1,1,1,2-tetrafluoropropene and 1,1,1,2-tetrafluoroethane
Provided are azeotrope-like compositions consisting essentially of 1,1,1,2-tetrafluoropropene and 1,1,1,2-tetrafluoroethane and uses thereof, including use in refrigerant compositions, refrigeration systems, blowing agent compositions, and aerosol propellants.
1. An azeotrope-like composition consisting essentially of from about 43.38 percent by weight to about 65.16 percent by weight of 1,1,1,2-tetrafluoropropene and from about 34.84 percent by weight to about 56.62 percent by weight of 1,1,1,2-tetrafluoroethane to form a non-flammable composition, said composition being azeotropic at least one concentration of the components within said range of component concentrations, said non-flammable composition having a boiling point that is below the boiling point of said 1,1,1,2-tetrafluoropropene and said 1,1,1,2-tetrafluoroethane and that is from about −29.16° C. to about −29.92° C. at a pressure of about 14.3 psia.
2. A method for modifying a refrigeration apparatus which refrigeration apparatus comprises a refrigerant and a lubricant, which refrigerant comprises a chlorofluorocarbon, a hydrofluorocarbon, a hydrochlorofluorocarbon, or combinations thereof, and the lubricant comprises a mineral oil, alkybenezene, polyalphaolefin, polyol ester, polyakylene glycol, polyvinyl ether, synthetic naphthalene, fluorolubricant or combinations thereof, the method comprising removing or leaking at least a portion of the refrigerant from the refrigeration apparatus and leaving a residue comprising the lubricant, and adding to said residue the azeotrope-like composition of claim 1 .
3. The azeotrope-like composition of claim 1 having a boiling point of from about −29.4° C. to about −29.9° C. at a pressure of about 14.3 psia.
4. The azeotrope-like composition of claim 1 which consists essentially of from about 39.32 percent by weight to about 52.9 weight percent 1,1,1,2-tetrafluoroethane and from about 47.1 to about 60.68 weight percent of 1,1,1,2-tetrafluoropropene.
5. A refrigerant composition comprising the azeotrope-like composition of claim 4 .
6. A method for cooling an article which comprises condensing a refrigerant composition of claim 5 and thereafter evaporating said refrigerant composition in the vicinity of the article to be cooled.
7. A method for heating an article which comprises condensing a refrigerant composition of claim 5 in the vicinity of the article to be heated and thereafter evaporating said refrigerant composition.
8. The azeotrope-like composition of claim 1 which consists essentially of from about 43.73 percent by weight to about 47.29 weight percent 1,1,1,2-tetrafluoroethane and from about 52.71 to about 56.27 weight percent of 1,1,1,2-tetrafluoropropene.
9. A refrigerant composition comprising the azeotrope-like composition of claim 8 .
10. A method for cooling an article which comprises condensing a refrigerant composition of claim 9 and thereafter evaporating said refrigerant composition in the vicinity of the article to be cooled.
11. A method for heating an article which comprises condensing a refrigerant composition of claim 9 in the vicinity of the article to be heated and thereafter evaporating said refrigerant composition.
12. The azeotrope-like composition of claim 1 which consists essentially of about 43.73 weight percent 1,1,1,2-tetrafluoroethane and about 56.27 weight percent of 1,1,1,2-tetrafluoropropene.
13. A refrigerant composition comprising the azeotrope-like composition of claim 12 .
14. A method for cooling an article which comprises condensing a refrigerant composition of claim 13 and thereafter evaporating said refrigerant composition in the vicinity of the article to be cooled.
15. A method for heating an article which comprises condensing a refrigerant composition of claim 13 in the vicinity of the article to be heated and thereafter evaporating said refrigerant composition.
16. The azeotrope-like composition of claim 1 having a boiling point of from about −30.0° C. to about −29.0° C. at a pressure of about 14.3 psia.
17. A refrigerant composition comprising the azeotrope-like composition of claim 1 .
18. A method for cooling an article which comprises condensing a refrigerant composition of claim 17 and thereafter evaporating said refrigerant composition in the vicinity of the article to be cooled.
19. A method for heating an article which comprises condensing a refrigerant composition of claim 17 in the vicinity of the article to be heated and thereafter evaporating said refrigerant composition.
20. A method of recharging a refrigerant system that contains a refrigerant to be replaced and a lubricant comprising the steps of: (a) removing the refrigerant to be replaced from the refrigeration system while retaining a substantial portion of the lubricant in said system; and (b) introducing to the system a refrigerant composition of claim 17 .