Tetrafluoropropene-based azeotropic compositions
AssigneeArkema France
InventorWissam RACHED
Life of this patent
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Abstract
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.
Claims19
Azeotropic compositions comprising between 74 to 81.5% weight of HFO-1324yf, between 6.5 to 10.5% weight of HFC-134a, and between 12 to 16% weight of HFC-152a, in relation to the total weight of the composition, said azeotropic composition having a boiling point between −40.00° C. and 70.00° C., at a pressure between 0.5 and 21.0 bar abs (±0.5%).
The azeotropic composition according to claim 11, comprising 75.5% (±0.2%) weight of HFO-1234yf, 14.5% (±0.2%) weight of HFC-152a and 10% (±0.2%) weight of HFC-134a, in relation to the total weight of the composition, said composition having a boiling point of 26.97° C. (±0.50° C.) at a pressure of 7.3 bar abs (±0.5%).
The azeotropic composition according to claim 13, comprising 77.5% (±0.2%) weight of HFO-1234yf, 12.2% (±0.2%) weight of HFC-152a and 10.3% (±0.2%) weight of HFC-134a, in relation to the total weight of the composition, said composition having a boiling point of 26.97° C. (±0.50° C.) at a pressure of 7.3 bar abs (±0.5%).
Dependencies are inferred from the claim text.