Process for the manufacture of hydrofluoroolefins

1. A process for producing the hydrofluoroolefin 2,3,3,3-tetrafluoro-1-propene, comprising the step of:

a) fluorinating the hydrochlorofluoroolefin 2-chloro-3,3,3-trifluor-1-propene in a gas phase, in the presence of a aluminum fluoride or chromium catalyst to form directly the hydrofluoroolefin 2,3,3,3-tetrafluoro-1-propene and co-products pentatluoropropane and chlorotetrafluoropropane.

2. The process of claim 1 further comprising the step of

separating said co-products from said hydrofluoroolefin.

3. The process of claim 1 wherein said pentafluoropropane comprises HFC-245eb and said chlorotetrafluoropropane comprises HCFC-244bb.

4. The process of claim 1 wherein the temperature ranges from about 250° C. to about 600° C.

5. The process of claim 1 wherein the temperature ranges from about 300° to about 500° C.

6. The process of claim 1 wherein the pressure ranges from about atmospheric to about 400 psig.

7. The process of claim 1 wherein the pressure ranges from about 50 to about 200 psig.

8. The process of claim 1 wherein the step of fluorinating the hydrochlorofluoroolefin in a gas phase, in the presence of a aluminum fluoride or chromium catalyst comprises contacting said hydrochlorofluoroolefin with hydrogen fluoride in the presence of said catalyst.

9. The process of claim 8 wherein said catalyst is a chromium catalyst supported or unsupported.

10. The process of claim 8 wherein said process further comprises a co-catalyst.

11. The process of claim 10 wherein said co-catalyst is selected from nickel, zinc, cobalt or manganese.

12. The process of claim 8 wherein said catalyst is activated prior to use.

13. The process of claim 12 wherein said catalyst is activated at a pressure above about 150 psi prior to use.