Binary azeotropic compositions of 1,1,2,2,3,3,4,4-octafluorobutane and either tran-1,2-dichloroethylene, cis 1,2-dichloroethylene, or 1-1 dichloroethane
AssigneeE. I. Du Pont de Nemours and Company
InventorsAbid N. Merchant, Janet C. Sung
Life of this patent
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Abstract
Azeotropic or azeotrope-like compositions of effective amounts of 1,1,2,2,3,3,4,4-octafluorobutane and trans-1,2-dichloroethylene; cis-1,2-dichloroethylene; or 1,1-dichloroethane to form an azeotropic or azeotrope-like composition are disclosed that are useful as cleaning agents, refrigerants, aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing agents, expansion agents for polyolefins and polyurethanes and as power cycle working fluids.
Claims5
An azeotropic or azeotrope-like composition, consisting essentially of 59.7 to 72.7 weight percent 1,1,2,2,3,3,4,4-octafluorobutane and 27.3 to 40.3 weight percent trans-1,2-dichloroethylene wherein said composition boils at about 36.2.degree. C. when the pressure has been adjusted to substantially atmospheric pressure;
- 77.2 to 89.2 weight percent 1,1,2,2,3,3,4,4-octafluorobutane and 10.8 to 22.8 weight percent cis-1,2-dichloroethylene wherein said composition boils at about 41.0.degree. C. when the pressure has been adjusted to substantially atmospheric pressure;
- or 79.3 to 86.3 weight percent 1,1,2,2,3,3,4,4-octafluorobutane and 13.7 to 20.7 weight percent 1,1-dichloroethane wherein said composition boils at about 42.3.degree. C. when the pressure has been adjusted to substantially atmospheric pressure.
Dependencies are inferred from the claim text.