Azeotrope-like composition of pentafluoropropane and a perfluorinated fluorocarbon having 5 to 7 carbon atoms or N-methylperfluoromoropholine or N-ethylperfluoromorpholine
AssigneeElectric Power Research Institute, Inc.
InventorsDavid Nalewajek, Earl A. E. Lund, David P. Wilson
Life of this patent
Estimating the term…
Abstract
Azeotrope-like compositions comprising pentafluoropropane and a perfluorocarbon having 5 to 7 carbon atoms or N-methylperfluoromorpholine OR N-ethylperfluoromorpholine are stable and have utility as refrigerants for heating and cooling, blowing agents, solvents and fire extinguishing agents.
Claims13
Compositions having azeotropic properties for use as heat transfer agents for heating, cooling, or combinations thereof, which compositions consist essentially of pentafluoropropane, and a second component selected from the group consisting of perfluoropentane, perfluorohexane, perfluoroheptane;
- wherein
- said compositions of 1,1,2,2,3-pentafluoropropane and perfluoropentane consist essentially of from about 90 to about 50 weight percent of 1,1,2,2,3-pentafluoropropane and from about 10 to about 50 weight percent of perfluoropentane, which compositions boil at about 18° C. at about 760 mm Hg;
- and
- said compositions of 1,1,2,2,3-pentafluoropropane and perfluorohexane consist essentially of about 90 to about 50 weight percent of 1,1,2,2,3-pentafluoropropane, and about 10 to about 50 weight percent of perfluorohexane which compositions boil at about 23° C. at about 760 mm Hg, and
- said compositions of 1,1,2,2,3-pentafluoropropane and perfluoroheptane consist essentially of about 99 to about 75 weight percent of 1,1,2,2,3-pentafluoropropane, about 1 to about 25 weight percent of perfluoroheptane which compositions boil at about 25° C. at about 760 mm Hg.
A method for heating or cooling using two-component compositions as direct replacements in conventional equipment for the refrigerant 1,2,3,3,3-pentafluoropropane, wherein said two-component compositions have azeotropic properties for use as heat transfer agents for heating, cooling, or combinations thereof, which method comprises adding a two-component composition consisting of pentafluoropropane and a second component selected from the group consisting of perfluoropentane, perfluorohexane, perfluoroheptane;
- wherein
- said compositions of 1,1,2,2,3-pentafluoropropane and perfluoropentane consist of from about 90 to about 50 weight percent of 1,1,2,2,3-pentafluoropropane and from about 10 to about 50 weight percent of perfluoropentane, which compositions boil at about 18° C. at about 760 mm Hg, and
- said compositions of 1,1,2,2,3-pentafluoropropane and perfluorohexane consist of about 90 to about 50 weight percent of 1,1,2,2,3-pentafluoropropane, and about 10 to about 50 weight percent of perfluorohexane which compositions boil at about 23° C. at about 760 mm Hg, and
- said compositions of 1,1,2,2,3-pentafluoropropane and perfluoroheptane consists of about 99 to about 75 weight percent of 1,1,2,2,3-pentafluoropropane, about 1 to about 25 weight percent of perfluoroheptane which compositions boil at about 25° C. at about 760 mm Hg.
Dependencies are inferred from the claim text.