Compositions and methods for cleaning vapor compression systems
AssigneeHoneywell International Inc.
InventorsRaymond Thomas, Hang Pham, Rajiv Singh, Kane Cook
Life of this patent
Estimating the term…
Abstract
Disclosed are azeotrope-like compositions comprising HFC-134a and at least one of HFC-245fa, HFC-365, and HFC-43-10 and methods for using the same to remove contaminants from a vapor compression system.
Claims20
An azeotrope or azeotrope-like composition comprising 1,1,1,2-tetrafluoroethane and one or more compounds selected from the group consisting of 1,1,1,3,3-pentafluoropropane, 1,1,1,3,3-pentafluorobutane, and 1,1,1,2,2,3,4,5,5,5-decafluoropentane.
An azeotrope-like composition consisting essentially of about 65 to 99 weight percent 1,1,1,2-tetrafluoroethane and 1 to 40 weight percent 1,1,1,3,3-pentafluorobutane, wherein said composition has a boiling point of approximately −25° to −26° C. at 14.4 psia.
An azeotrope-like composition consisting essentially of about 45 to 99 weight percent 1,1,1,2-tetrafluoroethane and 1 to 55 weight percent 1,1,1,2,2,3,4,5,5,5-decafluoropentane, wherein said composition has a boiling point from approximately −25° to −26° C. at 14.4 psia.
A non-azeotrope composition comprising 1,1,1,2-tetrafluoroethane and one or more compounds selected from the group consisting of 1,1,1,3,3-pentafluoropropane, 1,1,1,3,3-pentafluorobutane, and 1,1,1,2,2,3,4,5,5,5-decafluoropentane.
A method of removing a contaminant from a surface comprising:
- (a) contacting the surface with an azeotrope or azeotrope-like composition comprising 1,1,1,2-tetrafluoroethane and one or more compounds selected from the group consisting of 1,1,1,3,3-pentafluoropropane, 1,1,1,3,3-pentafluorobutane, and 1,1,1,2,2,3,4,5,5,5-decafluoropentane;
- and
- (b) removing at least a portion of said azeotrope or azeotrope-like composition from said surface.
A method of removing a contaminant from a surface comprising:
- (a) contacting the surface with a non-azeotrope composition comprising 1,1,1,2-tetrafluoroethane and one or more compounds selected from the group consisting of 1,1,1,3,3-pentafluoropropane, 1,1,1,3,3-pentafluorobutane, and 1,1,1,2,2,3,4,5,5,5-decafluoropentane;
- and
- (b) removing at least a portion of said non-azeotrope composition from said surface.
Dependencies are inferred from the claim text.