1,2,3,3,3-pentafluoropropene production processes
View Patent ↗The present disclosure relates to a new and efficient manufacturing process for the production of HFC-1225ye. The process involves contacting at least one hexafluoropropane selected from the group consisting of 1,1,1,2,2,3-hexafluoropropane and 1,1,1,2,3,3-hexafluoropropane with a suitable catalyst in a reactor to obtain a product mixture containing HFC-1225ye (1,2,3,3,3-pentafluoropropene) where the pressure in the reactor ranges from about 0.5 psig to about 100 psig.
1. A process, comprising: contacting 1,1,1,2,2,3-hexafluoropropane with a suitable catalyst in a reactor to obtain a product mixture comprising 1,2,3,3,3-pentafluoropropene, wherein the pressure in said reactor ranges from about 0.5 psig to about 100 psig.
2. The process of claim 1 wherein said pressure ranges from about 15 psig to about 60 psig.
3. The process of claim 1 wherein said pressure ranges from about 15 psig to about 45 psig.
4. The process of claim 1 further comprising: recovering 1,2,3,3,3-pentafluoropropene containing no more than 100 ppm-m HF from said product mixture.
5. The process of claim 1 further comprising: recovering 1,2,3,3,3-pentafluoropropene containing no more than 10 ppm-m HF from said product mixture.
6. The process of claim 1 further comprising: recovering 1,2,3,3,3-pentafluoropropene containing no more than 1 ppm-m HF from said product mixture.
7. The process of claim 1 wherein said suitable catalyst is selected from the group consisting of aluminum fluoride, fluorided alumina, metals on aluminum fluoride, and metals on fluorided alumina.
8. The process of claim 1 wherein said suitable catalyst is selected from the group consisting of magnesium oxides, magnesium fluorides, magnesium oxyfluorides, calcium oxides, calcium fluorides, calcium oxyfluorides, zinc oxides, zinc fluorides, zinc oxyfluorides, and mixtures thereof.
9. The process of claim 1 wherein said suitable catalyst is selected from the group consisting of lanthanum oxides and fluorided lanthanum oxides.
10. The process of claim 1 wherein said suitable catalyst is selected from the group consisting of chromium oxides, fluorided chromium oxides, and cubic chromium trifluoride.
11. The process of claim 1 wherein said suitable catalyst is a crystalline cobalt-substituted alpha-chromium oxide where from about 0.05 atom % to about 6 atom % of the chromium atoms in the alpha-chromium oxide lattice are replaced by trivalent cobalt atoms.
12. The process of claim 1 wherein said suitable catalyst is selected from the group consisting of carbon, acid-washed carbon, activated carbon, and three dimensional matrix carbonaceous materials.
13. The process of claim 1 wherein said suitable catalyst comprises a metal compound supported on carbon wherein said metal compound is an oxide, a fluoride, or an oxyfluoride of at least one metal selected from the group consisting of sodium, potassium, rubidium, cesium, yttrium, lanthanum, cerium, praseodymium, neodymium, samarium, chromium, iron, cobalt, rhodium, nickel, copper, zinc, and mixtures thereof.