Claims
- 1. An azeotropic or azeotrope-like composition consisting essentially of effective amounts of HFC-32 (CH2F2) and a hydrofluoroether selected from the group consisting of HFE-227caEβγ (CHF2OCF2CF3) and HFE-227eaE (CF3OCFHCF3) to form an azeotropic or azeotrope-like composition, and wherein after 50 weight percent of said composition has evaporated, the difference in vapor pressure between the original composition and the remaining composition is less than 10 percent.
- 2. An azeotropic or azeotrope-like composition consisting essentially of HFC-32 (CH2F2) and a hydrofluoroether selected from the group consisting of HFE-227caEβγ (CHF2OCF2CF3) and HFE-227eaE (CF3OCFHCF3), wherein said HFC-32 and HFE-227caEβγ composition has a vapor pressure of from about 255.3 to about 269.7 psia at 25° C.; said HFC-32 and HFE-227eaE composition has a vapor pressure of from about 257.1 to about 272.3 psia at 25° C.; and wherein after 50 weight percent of said composition has evaporated, the difference in vapor pressure between the original composition and the remaining composition is less than 10 percent.
- 3. An azeotropic or azeotrope-like composition consisting essentially of HFC-32 (CH2F2) and a hydrofluoroether, said composition selected from the group consisting of:from about 33.0 to about 99.0 weight percent weight percent HFC-32 (CH2F2) and from about 1.0 to about 67.0 weight percent HFE-227caEβγ (CHF2OCF2CF3) having a vapor pressure of from about 255.3 to about 269.7 psia at 25° C.; and from about 32.0 to about 99.0 weight percent weight percent HFC-32 (CH2F2) and from about 1.0 to about 68.0 weight percent HFE-227eaE (CF3OCFHCF3) having a vapor pressure of from about 257.1 to about 272.3 psia at 25° C; and wherein after 50 weight percent of said composition has evaporated, the difference in vapor pressure between the original composition and the remaining composition is less than 10 percent.
- 4. A process of heating comprising the step of condensing a composition of claim 1, 2 or 3 in the vicinity of an object to be heated.
- 5. A process of refrigeration comprising the step of evaporating a composition of claim 1, 2 or 3 in the vicinity of an object to be cooled.
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a divisional of U.S. patent application Ser. No. 09/533,557, filed Apr. 16, 1998 now U.S. Pat. No. 6,416,683 which is a divisional of application Ser. No. 08/871,312 now U.S. Pat. No. 5,779,931 filed Jun. 9, 1997 and granted Jul. 14, 1998, which is a divisional of Ser. No. 08/476,821 now U.S. Pat. No. 5,648,016 filed Jun. 7, 1995 and granted Jul. 15, 1997, which is a divisional of application Ser. No. 08/026,714 now U.S. Pat. No. 5,605,882 filed on Mar. 5, 1993 and granted Feb. 25, 1997, which is a continuation-in-part of application Ser. No. 07/954,999 filed Oct. 1, 1992 now abandoned, which is a continuation-in-part of application Ser. No. 07/890,508 filed May 28, 1992 now abandoned.
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Continuation in Parts (2)
|
Number |
Date |
Country |
Parent |
07/954999 |
Oct 1992 |
US |
Child |
08/026714 |
|
US |
Parent |
07/890508 |
May 1992 |
US |
Child |
07/954999 |
|
US |