Compositions containing difluoromethane, tetrafluoropropene, and carbon dioxide and uses thereof
AssigneeThe Chemours Company Fc, LLC
InventorsJoshua Hughes, Barbara Haviland Minor
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Abstract
In accordance with the present invention refrigerant compositions are disclosed. The compositions comprise a refrigerant mixture consisting essentially of HFC-32, HFO-1234yf, and CO2. The compositions are useful in processes to produce cooling and heating, in methods for replacing refrigerant R-32, and in refrigeration, air conditioning or heat pump systems. These inventive compositions are match cooling performance for R-32 with GWP less than 400 or less than 300.
Claims12
A composition for replacing R-32 consisting of from about 48 to about 59 weight percent difluoromethane, about 28 to about 45 weight percent 2,3,3,3-tetrafluoropropene, and about 4 to about 13 weight percent carbon dioxide, wherein the composition provides volumetric capacity within 10% of that for R-32, average temperature glide of less than 8° C., a GWP of less than 400, and a compressor discharge temperature of at least 80° C.
A composition for replacing R-32 consisting of:
- (a) from about 48 to about 59 weight percent difluoromethane, about 28 to about 45 weight percent 2,3,3,3-tetrafluoropropene, and about 4 to about 13 weight percent carbon dioxide, and
- (b) one or more components selected from the group consisting of lubricants, dyes, solubilizing agents, compatibilizers, stabilizers, tracers, anti-wear agents, extreme pressure agents, corrosion and oxidation inhibitors, metal surface energy reducers, metal surface deactivators, free radical scavengers, foam control agents, viscosity index improvers, pour point depressants, detergents, viscosity adjusters, and mixtures thereof
- wherein the composition provides volumetric capacity within 10% of that for R-32, average temperature glide of less than 8° C., a GWP of less than 400, and a compressor discharge temperature of at least 80° C.
Dependencies are inferred from the claim text.