Patent ID: 7663007

Claim:
A process for the manufacture of at least one compound selected from the group consisting of 1,3,3,3 -tetrafluoropropene and 1,1,3,3,3-pentafluoropropene, comprising: (a) reacting HF and at least one halopropene of the formula CX 3 CCl═CClX, wherein each X is independently selected from the group consisting of F and Cl, to produce a product comprising CF 3 CCl═CF 2 and CF 3 CHClCF 3 , wherein said CF 3 CCl═CF 2 and CF 3 CHClCF 3 are produced in the presence of a fluorination catalyst comprising at least one chromium-containing component selected from (i) a crystalline alpha-chromium oxide where at least 0.05 atom % of the chromium atoms in the alpha-chromium oxide lattice are replaced by divalent copper, and (ii) a chromium-containing composition of (i) which has been treated with a fluorinating agent; (b) reacting CF 3 CCl═CF 2 , CF 3 CHClCF 3 or both CF 3 CCl═CF 2 and CF 3 CHClCF 3 produced in (a) with hydrogen, optionally in the presence of HF, to produce a product comprising at least one compound selected from the group consisting of CF 3 CH 2 CHF 2 and CF 3 CH 2 CF 3 ; (c) dehydrofluorinating at least one compound selected from the group consisting of CF 3 CH 2 CHF 2 and CF 3 CH 2 CF 3 produced in (b), to produce a product comprising at least one compound selected from the group consisting of CF 3 CH═CHF and CF 3 CH═CF 2 ; and (d) recovering at least one compound selected from the group consisting of CF 3 CH═CHF and CF 3 CH═CF 2 from the product produced in (c).