Azeotrope-like compositions of tetrafluoropropene and hydrofluorocarbons
AssigneeHoneywell International Inc.
InventorsRajiv R. Singh, Hang T. Pham, Gary M. Knopeck, Louis E. Herena, Jeremy N. Diringer
Life of this patent
Estimating the term…
Abstract
Provided are azeotrope-like compositions comprising tetrafluoropropene and hydrofluorocarbons and uses thereof, including use in refrigerant compositions, refrigeration systems, blowing agent compositions, and aerosol propellants.
Claims32
An azeotrope-like composition consisting essentially of effective amounts of trans-1,3,3,3-tetrafluoropropene (transHFO-1234ze) and a compound selected from the group consisting of 1,1-difluoroethane (“HFC-152a”), 1,1,1,2,3,3,3-heptafluoropropane (“HFC-227ea”), 1,1,1,2-tetrafluoroethane (“HFC-134a”), 1,1,1,2,2-pentafluoroethane (“HFC-125”) and combinations of two or more of these.
A composition comprising an azeotrope-like mixture consisting of transHFO-1234ze and a component selected from the group consisting of 1,1-difluoroethane (“HFC-152a”), 1,1,1,2,3,3,3-heptafluoropropane (“HFC-227ea”), 1,1,1,2-tetrafluoroethane (“HFC-134a”), and 1,1,1,2,2-pentafluoroethane (“HFC-125”).
An azeotrope-like composition comprising effective amounts of trans-1,3,3,3-tetrafluoropropene (transHFO-1234ze) and a compound selected from the group consisting of 1,1,1,2,3,3,3-heptafluoropropane (“HFC-227ea”), 1,1,1,2,-tetrafluoroethane (“HFC-134a”), 1,1,1,2,2-pentafluoroethane (“HFC-125”) and combinations of two or more of these.
Dependencies are inferred from the claim text.