Azeotrope-Like Compositions of Tetrafluoropropene And Hydrofluorocarbons

Abstract

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.

What is claimed is: 
     
         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 %. 
     
     
         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 1  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 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.