Azeotrope-like compositions containing fluoroethane
AssigneeE. I. Du Pont de Nemours and Company
InventorsBarbara Haviland Minor, Vinci Martinez Felix, Allen Capron Sievert
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Abstract
The present invention relates to the discovery of compositions which include fluoroethane, 2-fluoropropane or tert-butylfluoride. These compositions are useful as pure components or with at least one of tetrafluoroethane, difluoroethane, hexafluoropropane, a hydrocarbon or dimethylether. These compositions are useful as aerosol propellants, refrigerants, cleaning agents, expansion agents for polyolefins and polyurethanes, refrigerants, heat transfer media, gaseous dielectrics, fire extinguishing agents, power cycle working fluids, polymerization media, particulate removal fluids, carrier fluids, buffing abrasive agents, and displacement drying agents.
Claims4
An azeotropic or azeotrope-like composition consisting essentially of:
- 75-99 weight percent fluoroethane and 1-25 weight percent tert-butylfluoride, wherein when the temperature of said composition has been adjusted to about −20° C., said composition has a vapor pressure of about 27.2 psia (188 kPa) to about 31.1 psia (214 kPa);
- 67-99 weight percent fluoroethane and 1-33 weight percent butane wherein when the temperature of said composition has been adjusted to about −20° C., said composition has a vapor pressure of about 26.5 psia (183 kPa) to about 31.1 psia (214 kPa);
- 52-99 weight percent fluoroethane and 1-48 weight percent isobutane wherein when the temperature of said composition has been adjusted to about −20° C., said composition has a vapor pressure of about 26.4 psia (182 kPa) to about 31.2 psia (215 kPa);
- 1-99 weight percent fluoroethane and 1-99 weight percent dimethylether wherein when the temperature of said composition has been adjusted to about −30° C., said composition has a vapor pressure of about 11.6 psia (80.0 kPa) to about 20.8 psia (143 kPa);
Dependencies are inferred from the claim text.