1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone refrigerant compositions and uses thereof
AssigneeE. I. DuPont DeNemours and Company
InventorsBarbara Haviland Minor, Thomas J. Leck
Life of this patent
Estimating the term…
Abstract
The present invention relates to compositions for use in refrigeration and air conditioning systems comprising 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and at least one chlorocarbon, alcohol, ketone, ether, ester, N-(difluoromethyl)-N,N-dimethylamine, 1,1,1,2,2-pentafluoro-2-[(pentafluoroethyl)thio]ethane or mixtures thereof, and which are also useful in systems employing a centrifugal compressor The compositions of the present invention may be azeotropic or near azeotropic and are useful in processes for producing refrigeration or heat or as heat transfer fluids.
Claims16
An azeotropic or near-azeotropic composition comprising about 48 to about 87 weight percent 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and about 52 to about 13 weight percent trans-1,2-dichloroethylene.
An azeotropic composition of 72 weight percent 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl )-3-pentanone and 28 weight percent trans-1,2-dichloroethylene having a vapor pressure of about 14.7 psia (101 kPa) at a temperature of about 31.8° C.
Dependencies are inferred from the claim text.