US Patent 11306232 Tetrafluoropropene-based azeotropic compositions

Azeotropic compositions including between 74 and 81.5 wt.-% HFO-1324yf, between 6.5 and 10.5 wt.-% HFC-134a, and between 12 and 16 wt.-% HFC-152a, relative to the total weight of the composition, the azeotropic composition having a boiling point of between −40.00° C. and 70.00° C., at a pressure of between 0.5 and 21.0 bar abs (±0.5%). Also, the uses of the aforementioned compositions in heat transfer systems.