Azeotrope-like compositions containing fluoroethane
AssigneeE. I. Du Pont de Nemours and Company
InventorsVinci Martinez Felix, Barbara Haviland Minor, Allen Capron Sievert
Life of this patent
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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.
Claims19
An aerosol propellant comprising fluoroethane.
An aerosol propellant comprising 2-fluoropropane.
An aerosol propellant comprising tert-butylfluoride.
A composition comprising 1-99 weight percent fluoroethane and 1-99 weight percent of at least one of 1,1,1,2-tetrafluoroethane, 1,1-difluoroethane, 2-fluoropropane, tert-butylfluoride, butane, isobutane or dimethylether;
- 1 to 99 weight percent 2-fluoropropane and 1 to 99 weight percent of at least one of 1,1,1,2-tetrafluoroethane, 1,1-difluoroethane, tert-butylfluoride, propane, dimethylether;
- or 1 to 99 weight percent tert-butylfluoride and 1 to 99 weight percent of at least one of 1,1,2,2-tetrafluoroethane, 1,1,1,2-tetrafluoroethane, 1,1-difluoroethane, 1,1,1,2,3,3-hexafluoropropane, 1,1,1,3,3,3-hexafluoropropane, butane, isobutane, propane or dimethylether.
Effective amounts of the following compounds to form an azeotropic or azeotrope-like composition:
- comprising fluoroethane and 1,1,1,2-tetrafluoroethane, 1,1-difluoroethane, 2-fluoropropane, tert-butylfluoride, butane, isobutane or dimethylether;
- 2-fluoropropane and 1,1,1,2-tetrafluoroethane, 1,1-difluoroethane, tert-butylfluoride, propane, dimethylether;
- or tert-butylfluoride and 1,1,2,2-tetrafluoroethane, 1,1,1,2-tetrafluoroethane, 1,1-difluoroethane, 1,1,1,2,3,3-hexafluoropropane, 1,1,1,3,3,3-hexafluoropropane, butane, isobutane, propane or dimethylether.
Effective amounts of tert-butylfluoride and a compound selected from the group consisting of 1,1,2,2-tetrafluoroethane, 1,1,1,2,3,3-hexafluoropropane or 1,1,1,3,3,3-hexafluoropropane to form binary compositions having a vapor pressure higher than that of the components of the binary composition.
Dependencies are inferred from the claim text.