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US 9,039,923 B2Granted
Composition of zeotropic mixtures having predefined temperature glide
AssigneeUnited Technologies Corporation
InventorsAhmad M. Mahmoud, Jaeseon Lee, Dong Luo
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Abstract
A composition of a zeotropic mixture has a first chemical constituent and at least one second, different chemical constituent. The zeoptropic mixture has a temperature glide of 5° C.-25° C. with regard to its saturated vapor temperature and its saturated liquid temperature. The first chemical constituent is selected from 1,1,1,3,3-pentafluoropropane, 1,1,2,2,3-pentafluoropropane, 1,1,1,3,3-pentafluorobutane, methyl perfluoropropyl ether, 1,1,1,2,3,3-hexafluoropropane and 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone.
Claims3
A composition comprising:
- a zeotropic mixture including, by weight, 15-5% of a first chemical constituent and 85-95% of at least one second, different chemical constituent, the zeotropic mixture having a temperature glide of 5° C.-25° C. with regard to its saturated liquid temperature and its saturated vapor temperature, wherein the first chemical constituent is 1,1,1,3,3-pentafluoropropane and the second chemical constituent is pentane.
Dependencies are inferred from the claim text.