1,1,1,3,3-Pentafluorobutane refrigerant compositions comprising fluoroether and uses thereof
AssigneeE. I. Du Pont de Nemours and Company
InventorsBarbara Minor, Mario Nappa, Allen Sievert
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Abstract
Disclosed herein are 1,1,1,3,3-pentafluorobutane refrigerant or heat transfer fluid compositions further comprising fluoroether, which are useful in refrigerain or air conditioning apparatus or as heat transfer fluids. The compositions of the present invention are also useful in centrifugal compressor apparatus that employ two-stage compressors or single slab.single pass heat exchangers.
Claims38
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A refrigerant or heat transfer fluid composition comprising 1,1,1,3,3-pentafluorobutane and 1,1,1,3,3,3-hexafluro-2-(fluoromethoxy)propane.
A refrigerant or heat transfer fluid composition suitable for use in refrigeration or air conditioning apparatus employing (i) centrifugal compressor, or (ii) multi-stage centrifugal compressor, or (iii) a single slab/single pass heat exchanger, said composition comprising, 1,1,1,3,3-pentafluorobutane and 1,1,1,3,3,3-hexafluoro-2-(fluoromethoxy)propane.
An azeotropic or near-azeotropic composition selected from the group consisting of:
- about 37 to about 99 weight percent 1,1,1,3,3-pentafluorobutane and about 1 to about 63 weight percent 1,1,1,3,3,3-hexafluoro-2-(fluoromethoxy)propane.
An azeotropic composition selected from the group consisting of:
- 87.1 weight percent 1,1,1,3,3-pentafluorobutane and 12.9 weight percent 1,1,1,3,3,3-hexafluoro-2-(fluoromethoxy)propane having a vapor pressure of about 14.7 psia (101 kPa) at a temperature of about 39.6° C.
Dependencies are inferred from the claim text.