Azeotrope-like composition of 1,1,1,3,3-pentafluoropropane and hydrogen fluoride
AssigneeAlliedSignal Inc.
InventorsHang Thanh Pham, Rajiv Ratna Singh, Ian Robert Shankland, Hsueh Sung Tung
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Abstract
Provided are azeotropic and azeotrope-like mixtures of 1,1,1,3,3-pentafluoropropane (HFC-245fa) and hydrogen fluoride. Such are useful as an intermediate in the production of HFC-245fa. The latter is useful as a nontoxic, zero ozone depleting fluorocarbon useful as a solvent, blowing agent, refrigerant, cleaning agent, aerosol propellant, heat transfer medium, dielectric, fire extinguishing composition and power cycle working fluid.
Claims9
A process for removing 1,1,1,3,3-pentafluoropropane from a mixture containing 1,1,1,3,3-pentafluoropropane and at least one impurity, which comprises adding hydrogen fluoride to the mixture in an amount sufficient to form an azeotropic or azeotrope-like composition of the 1,1,1,3,3-pentafluoropropane and the hydrogen fluoride, and thereafter separating the azeotropic composition from the impurity.
Dependencies are inferred from the claim text.