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 (a) trans-1,3,3,3-tetrafluoropropene (transHFO-1234ze) and (b) 1,1-difluoroethane (“HFC-152a”), said HFC-152a being present in the azeotrope-like composition in a range of from about 50 wt % to less than 100 wt %, wherein said composition includes a minimum boiling azeotrope having a liquid composition component concentration equal to the vapor composition component concentration, whereby at a pressure of about 14.4 psia said azeotrope-like composition has a boiling point of −23° C. +/−2° C.
2. A heat transfer composition comprising the azeotrope-like composition of claim 1 .
3. The heat transfer composition of claim 2 wherein said azeotrope-like composition has a boiling point of from about −23° C. +/−1° C. at a pressure of about 14.4 psia.
4. A refrigeration system comprising the heat transfer composition of claim 2 .
5. An air conditioning system comprising the heat transfer composition of claim 2 .
6. A refrigeration system originally designed for use with HFC-134a and comprising the heat transfer composition of claim 2 .
7. The heat transfer composition of claim 2 wherein said heat transfer composition is non-flammable.
8. The heat transfer composition of claim 7 further comprising a lubricant.
9. An azeotrope-like composition consisting essentially of (a) trans-1,3,3,3-tetrafluoropropene (transHFO-1234ze) and (b) 1,1,1,2,2-pentafluoroethane (“HFC-125”), said HFC-125 being present in the azeotrope-like composition in a range of from about 60 wt % to less than about 99 wt %, wherein said composition range includes a minimum boiling azeotrope having a liquid composition component concentration equal to the vapor composition component concentration, whereby at a pressure of about 14.4 psia said azeotrope-like composition has a boiling point of −47° C. +/−2° C.
10. A heat transfer composition comprising the azeotrope-like composition of claim 9 .
11. A refrigeration system comprising the heat transfer composition of claim 10 .
12. The heat transfer composition of claim 11 wherein said heat transfer composition is non-flammable.