US 5,250,208 AGranted

Ternary azeotropic compositions

AssigneeE. I. Du Pont de Nemours and Company

InventorsAbid N. Merchant, Janet C. Sung

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Abstract

Azeotropic or azeotrope-like compositions of effective amounts of 1,1,2,2,3,3,4,4,-octofluorobutane; trans-1,2-dichloroethylene, cis-1,2-dichloroethylene, 1,1-dichloroethane, or 1,3-dichloro-1,2,2,3,3-HCFC-225cb; and an alcohol such as methanol, ethanol, or isopropanol, 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

Dependent claims

An azeotropic or azeotrope like composition consisting essentially of 56.8 to 69.8 weight percent 1,1,2,2,3,3,4,4-octafluorobutane, 27.9 to 39.9 weight percent trans-1,2-dichloroethylene, and 1.8 to 3.8 weight percent methanol, wherein when the pressure has been adjusted to substantially atmospheric pressure, the boiling point of the composition is about 34.7.degree. C.;

63.2 to 69.2 weight percent 1,1,2,2,3,3,4,4-octafluorobutane, 30.0 to 36.0 weight percent trans-1,2-dichloroethylene, and 0.2 to 1.4 weight percent ethanol, wherein when the pressure has been adjusted to substantially atmospheric pressure, the boiling point of the composition is about 36.1.degree. C.;
60.0 to 68.0 weight percent 1,1,2,2,3,3,4,4-octafluorobutane, 31.7 to 39.7 weight percent trans-1,2-dichloro-ethylene, and 0.1 to 0.5 weight percent isopropanol, wherein when the pressure has been adjusted to substantially atmospheric pressure, the boiling point of the composition is about 36.0.degree. C.;
78.2 to 84.2 weight percent 1,1,2,2,3,3,4,4-octafluorobutane, 12.3 to 18.3 weight percent cis-1,2-dichloroethylene, and 2.5 to 4.5 weight percent methanol, wherein when the pressure has been adjusted to substantially atmospheric pressure, the boiling point of the composition is about 40.2.degree. C.;
72.4to 85.4 weight percent 1,1,2,2,3,3,4,4,-octafluorobutane 12.7 to 26.7 weight percent cis-1,2-dichloroethylene, and 0.4 to 2.4 weight percent ethanol, wherein when the pressure has been adjusted to to substantially atmospheric pressure, the boiling point of the composition is about 42.5.degree. C.;
75.0 to 86.0 weight percent 1,1,2,2,3,3,4,4-octafluorobutane, 12.5 to 23.5 weight percent cis-1,2-dichloroethylene, and 0.1 to 1.0 weight percent isopropanol, wherein when the pressure has been adjusted to substantially atmospheric pressure, the boiling point of the composition is about 42.2.degree. C.;
76.6 to 84.6 weight percent 1,1,2,2,3,3,4,4-octafluorobutane, 14.0 to 18.0 weight percent 1,1-dichloroethane, and 1.4 to 5.4 weight percent methanol, wherein when the pressure has been adjusted to substantially atmospheric pressure, the boiling point of the composition is about 40.3.degree. C.;
73.5 to 82.5 weight percent 1,1,2,2,3,3,4,4-octafluorobutane, 17.1 to 24.1 weight percent 1,1-dichloroethane, and 0.4 to 2.4 weight percent ethanol, wherein when the pressure has been adjusted to substantially atmospheric pressure, the boiling point of the composition is about 39.6.degree. C.;
and 77.0 to 87.0 weight percent 1,1,2,2,3,3,4,4-octafluorobutane, 12.6 to 22.6 weight percent 1,1-dichlorethane, and 0.1 to 1.0 weight percent isopropanol, wherein when the pressure has been adjusted to substantially atmospheric pressure, the boiling point of the composition is about 42.6.degree. C.

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Dependencies are inferred from the claim text.

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Abstract

63.2 to 69.2 weight percent 1,1,2,2,3,3,4,4-octafluorobutane, 30.0 to 36.0 weight percent trans-1,2-dichloroethylene, and 0.2 to 1.4 weight percent ethanol, wherein when the pressure has been adjusted to substantially atmospheric pressure, the boiling point of the composition is about 36.1.degree. C.;
60.0 to 68.0 weight percent 1,1,2,2,3,3,4,4-octafluorobutane, 31.7 to 39.7 weight percent trans-1,2-dichloro-ethylene, and 0.1 to 0.5 weight percent isopropanol, wherein when the pressure has been adjusted to substantially atmospheric pressure, the boiling point of the composition is about 36.0.degree. C.;
78.2 to 84.2 weight percent 1,1,2,2,3,3,4,4-octafluorobutane, 12.3 to 18.3 weight percent cis-1,2-dichloroethylene, and 2.5 to 4.5 weight percent methanol, wherein when the pressure has been adjusted to substantially atmospheric pressure, the boiling point of the composition is about 40.2.degree. C.;
72.4to 85.4 weight percent 1,1,2,2,3,3,4,4,-octafluorobutane 12.7 to 26.7 weight percent cis-1,2-dichloroethylene, and 0.4 to 2.4 weight percent ethanol, wherein when the pressure has been adjusted to to substantially atmospheric pressure, the boiling point of the composition is about 42.5.degree. C.;
75.0 to 86.0 weight percent 1,1,2,2,3,3,4,4-octafluorobutane, 12.5 to 23.5 weight percent cis-1,2-dichloroethylene, and 0.1 to 1.0 weight percent isopropanol, wherein when the pressure has been adjusted to substantially atmospheric pressure, the boiling point of the composition is about 42.2.degree. C.;
76.6 to 84.6 weight percent 1,1,2,2,3,3,4,4-octafluorobutane, 14.0 to 18.0 weight percent 1,1-dichloroethane, and 1.4 to 5.4 weight percent methanol, wherein when the pressure has been adjusted to substantially atmospheric pressure, the boiling point of the composition is about 40.3.degree. C.;
73.5 to 82.5 weight percent 1,1,2,2,3,3,4,4-octafluorobutane, 17.1 to 24.1 weight percent 1,1-dichloroethane, and 0.4 to 2.4 weight percent ethanol, wherein when the pressure has been adjusted to substantially atmospheric pressure, the boiling point of the composition is about 39.6.degree. C.;
and 77.0 to 87.0 weight percent 1,1,2,2,3,3,4,4-octafluorobutane, 12.6 to 22.6 weight percent 1,1-dichlorethane, and 0.1 to 1.0 weight percent isopropanol, wherein when the pressure has been adjusted to substantially atmospheric pressure, the boiling point of the composition is about 42.6.degree. C.

5 more elements