Azeotrope-like compositions of 1-chloro-1,3,3,3-tetrafluoropropane and 1,2-dichloro-3,3,3-trifluoropropene
AssigneeHoneywell International Inc.
InventorsRobert C. Johnson, Daniel C. Merkel, Hsuehsung Tung
Life of this patent
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Abstract
Provided are azeotropic and azeotrope-like mixtures of 1-chloro-1,3,3,3-tetrafluoropropane and 1,2-dichloro-3,3,3-trifluoropropene that are useful as an intermediate in the production of HFC-245fa. HFC-245fa is useful as a nontoxic, zero ozone depleting fluorocarbon useful as solvents, blowing agents, refrigerants, cleaning agents, aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing compositions and power cycle working fluids.
Claims33
An azeotropic or azeotropic-like composition comprising 1-chloro-1,3,3,3-tetrafluoropropane and 1,2-dichloro-3,3,3-trifluoropropene.
An azeotropic or azeotropic-like composition comprising from greater than about 0 weight percent to about 50 weight percent 1,2-dichloro-3,3,3-trifluoropropene and about 50 weight percent to less than about 100 weight percent 1-chloro-1,3,3,3-tetrafluoropropane.
A process for forming an azeotropic or azeotropic-like composition of 1,2-dichloro-3,3,3-trifluoropropene and 1-chloro-1,3,3,3-tetrafluoropropane comprising the steps of:
- (a) reacting hydrogen fluoride with 1,1,1,3,3-pentachloropropane thereby producing an intermediate composition;
- and thereafter
- (b) separating an azeotropic or azeotropic-like composition of 1,2-dichloro-3,3,3-trifluoropropene and 1-chloro-1,3,3,3-tetrafluoropropane from the intermediate composition.
An azeotropic or azeotropic-like composition consisting essentially of 1-chloro-1,3,3,3-tetrafluoropropane and 1,2-dichloro-3,3,3- trifluoropropene.
A process for forming an azeotropic or axeotropic-like composition of 1,2-dichloro-3,3,3-tetrafluoropropane comprising the steps of:
- (a) reacting hydrogen fluoride with 1,1,1,1,1-pentachloropropane thereby producing an intermediate composition;
- and thereafter
- (b) separating an azeotropic or azeotropic-like composition consisting essentially of 1,2-dichloro-3,3,3-trifluoropropene and 1-chloro-1,3,3,3-tetrafluoropropane from the intermediate composition.
Dependencies are inferred from the claim text.