1,2,3,3,3-pentafluropropene production processes
AssigneeE. I. Du Pont de Nemours and Company
InventorsVELLIYUR NOTT MALLIKARJUNA RAO, Mario Joseph Nappa, Allen Capron Sievert
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Abstract
A process is disclosed for making CF3CF═CHF. The process involves reacting CF3CClFCCl2F with H2 in a reaction zone in the presence of a catalyst to produce a product mixture comprising CF3CF═CHF. The catalyst has a catalytically effective amount of palladium supported on a support selected from the group consisting of alumina, fluorided alumina, aluminum fluoride and mixtures thereof and the mole ratio of H2 to CF3CClFCCl2F fed to the reaction zone is between about 1:1 and about 5:1. Also disclosed are azeotropic compositions of CF3CClFCCl2F and HF and azeotropic composition of CF3CHFCH2F and HF.
Claims4
A composition comprising:
- (a) CF3CClFCCl2F and
- (b) HF;
- wherein the HF is present in an effective amount to form an azeotropic combination with the CF3CClFCCl2F.
A composition comprising from about 98.2 mole percent to about 78.0 mole percent HF and from about 1.8 mole percent to about 22.0 mole percent CF3CClFCCl2F which form azeotropes boiling at a temperature from between about −20° C. and about 140° C. and at a pressure from between about 3.05 psi (21.0 kPa) and about 951 psi (6557 kPa).
A composition comprising:
- (a) 1,1,1,2,3-pentafluoropropane and
- (b) HF;
- wherein the HF is present in an effective amount to form an azeotropic combination with the 1,1,1,2,3-pentafluoropropane.
A composition comprising from about 81.0 mole percent to about 55. 0 mole percent HF and from about 19.0 mole percent to about 45.0 mole percent 1,1,1,2,3-pentafluoropropane which form azeotropes boiling at a temperature of from about −20° C. to about 135° C. and at a pressure of from about 4 psi (27.5 kPa) to about 550 psi (3792 kPa).
Dependencies are inferred from the claim text.