Azeotrope-like compositions of tetrafluoropropene and hydrofluorocarbons
View Patent ↗Provided are azeotrope-like compositions comprising tetrafluoropropene and hydrofluorocarbons and uses thereof, including use in refrigerant compositions, refrigeration systems, blowing agent compositions, and aerosol propellants.
1. An azeotrope-like composition consisting essentially of effective amounts of trans-1,3,3,3-tetrafluoropropene (transHFO-1234ze) and a compound selected from the group consisting of 1,1-difluoroethane (“HFC-152a”), 1,1,1,2,3,3,3-heptafluoropropane (“HFC-227ea”), 1,1,1,2-tetrafluoroethane (“HFC-134a”), 1,1,1,2,2-pentafluoroethane (“HFC-125”) and combinations of two or more of these.
2. A composition comprising an azeotrope-like mixture consisting of transHFO-1234ze and a component selected from the group consisting of 1,1-difluoroethane (“HFC-152a”), 1,1,1,2,3,3,3-heptafluoropropane (“HFC-227ea”), 1,1,1,2-tetrafluoroethane (“HFC-134a”), and 1,1,1,2,2-pentafluoroethane (“HFC-125”).
3. An azeotrope-like composition in accordance with claim 1 having a boiling point of from about —26° C. to about —23° C. at a pressure of about 14.4 psia.
4. The azeotrope-like composition of claim 1 which consists essentially of from greater than zero to about 75 weight percent transHFO-1234ze and from about 25 to less than 100 weight percent of HFC-152a.
5. The azeotrope-like composition of claim 1 which consists essentially of from greater than zero to about 50 weight percent transHFO-1234ze and from about 50 to less than 100 weight percent of HFC-152a.
6. The azeotrope-like composition of claim 1 which consists of from about 15 to about 30 weight percent transHFO-1234ze and from about 70 to about 85 weight percent of HFC-152a.
7. An azeotrope-like composition in accordance with claim 6 having a boiling point of from about —26° C. to about —23° C. at a pressure of about 14.4 psia.
8. A sprayable composition comprising a material to be sprayed and a propellant comprising an azeotrope-like composition of claim 1 .
9. A refrigerant composition comprising an azeotrope-like composition of claim 1 .
10. A refrigeration system comprising a refrigerant of claim 9 .
11. 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.
12. 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.
13. 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 1 .
14. A blowing agent comprising an azeotrope-like composition of claim 1 .
15. An azeotrope-like composition comprising effective amounts of trans-1,3,3,3-tetrafluoropropene (transHFO-1234ze) and a compound selected from the group consisting of 1,1,1,2,3,3,3-heptafluoropropane (“HFC-227ea”), 1,1,1,2,-tetrafluoroethane (“HFC-134a”), 1,1,1,2,2-pentafluoroethane (“HFC-125”) and combinations of two or more of these.
16. The azeotrope-like composition of claim 15 which consists essentially of from greater than zero to about 75 weight percent transHFO-1234ze and from about 25 to less than 100 weight percent of HFC-134a.
17. The azeotrope-like composition of claim 15 which consists essentially of from greater than zero to about 60 weight percent transHFO-1234ze and from about 40 to less than 100 weight percent of HFC-134a.
18. The azeotrope-like composition of claim 15 which consists essentially of from about 1 to about 40 weight percent transHFO-1234ze and from about 60 to about 99 weight percent of HFC-134a.
19. The azeotrope-like composition of claim 15 which consists essentially of from about 5 to about 35 weight percent transHFO-1234ze and from about 65 to about 95 weight percent of HFC-134a.
20. An azeotrope-like composition in accordance with claim 19 having a boiling point of from about −26° C. to about −23° C. at a pressure of about 14.4 psia.
21. The azeotrope-like composition of claim 15 which consists essentially of from greater than zero to about 75 weight percent transHFO-1234ze and from about 25 to less than 100 weight percent of HFC-125.
22. The azeotrope-like composition of claim 15 which consists essentially of from greater than zero to about 60 weight percent transHFO-1234ze and from about 40 to less than 100 weight percent of HFC-125.
23. The azeotrope-like composition of claim 15 which consists essentially of from about 1 to about 40 weight percent transHFO-1234ze and from about 60 to about 99 weight percent of HFC-125.
24. The azeotrope-like composition of claim 15 which consists essentially of from about 2 to about 15 weight percent transHFO-1234ze and from about 85 to about 98 weight percent of HFC-125.
25. An azeotrope-like composition in accordance with claim 24 having a boiling point of from about −49° C. to about −42° C. at a pressure of about 14.4 psia.
26. The azeotrope-like composition of claim 15 which consists essentially of from greater than zero to about 75 weight percent HFC-227ea and from about 25 to less than 100 weight percent of transHFO-1234ze.
27. The azeotrope-like composition of claim 15 which consists essentially of from greater than zero to about 50 weight percent HFC-227ea and from about 50 to less than 100 weight percent of transHFO-1234ze.
28. The azeotrope-like composition of claim 15 which consists essentially of from about 5 to about 35 weight percent HFC-227ea and from about 65 to about 95 weight percent of transHFO-1234ze.
29. An azeotrope-like composition in accordance with claim 28 having a boiling point of from about −17° C. to about −19° C. at a pressure of about 14.4 psia.
30. A sprayable composition according to claim 8 wherein the sprayable composition is an aerosol.
31. A sprayable composition according to claim 8 Further comprising a drug or a biologically active material.
32. A sprayable composition according to claim 31 wherein said drug or a biologically active material is selected from anti-asthma and anti-halitosis medications.