Preparation of fluorinated olefins via catalytic dehydrohalogenation of halogenated hydrocarbons
View Patent ↗A process for making a fluorinated olefin having the step of dehydrochlorinating a hydrochlorofluorocarbon having at least one hydrogen atom and at least one chlorine atom on adjacent carbon atoms, preferably carried out in the presence of a catalyst selected from the group consisting of (i) one or more metal halides, (ii) one or more halogenated metal oxides, (iii) one or more zero-valent metals/metal alloys, (iv) a combination of two or more of the foregoing.
1. A process for making 2,3,3,3-tetrafluoropropene, comprising:
dehydrochlorinating 1,1,1,2-tetrafluoro-2-chloropropane in the presence of at least one catalyst selected from the group consisting of NaF, fluorinated MgO, MgF 2 , CaF 2 , fluorinated Cr 2 O 3 , FeF 3 , LiCl with MgF 2 , KCl with MgF 2 , CsCl with MgF 2 , CsCl, Fe with MgF 2 , Co with MgF 2 , Ni with MgF 2 , Pd with BaSO 4 , Ni, Iconel 600, and Inconel 625.
2. The process of claim 1 wherein dehydrochlorination is carried out at a temperature of from about 300 to about 600 ° C.
3. The process of claim 1 wherein dehydrochlorination is carried out at a temperature of from about 400 to about 500 ° C.
4. The process of claim 1 , wherein the catalyst comprises NaF.
5. The process of claim 1 , wherein the catalyst comprises fluorinated MgO.
6. The process of claim 1 , wherein the catalyst comprises MgF 2 .
7. The process of claim 1 , wherein the catalyst comprises CaF 2 .
8. The process of claim 1 , wherein the catalyst comprises fluorinated Cr 2 O 3 .
9. The process of claim 1 , wherein the catalyst comprises FeF 3 .
10. The process of claim 1 , wherein the catalyst comprises LiCl with MgF 2 .
11. The process of claim 1 , wherein the catalyst comprises KCl with MgF 2 .
12. The process of claim 1 , wherein the catalyst comprises CsCl with MgF 2 .
13. The process of claim 1 , wherein the catalyst comprises CsCl.
14. The process of claim 1 , wherein the catalyst comprises Fe with MgF 2 .
15. The process of claim 1 , wherein the catalyst comprises Co with MgF 2 .
16. The process of claim 1 , wherein the catalyst comprises Ni with MgF 2 .
17. The process of claim 1 , wherein the catalyst comprises Pd with BaSO 4 .
18. The process of claim 1 , wherein the catalyst comprises Ni.
19. The process of claim 18 , wherein the catalyst comprises Ni mesh.
20. The process of claim 1 , wherein the catalyst comprises Inconel 600.
21. The process of claim 20 , wherein the catalyst comprises Inconel 600 chips.
22. The process of claim 1 , wherein the catalyst comprises Inconel 625.
23. The process of claim 22 , wherein the catalyst comprises Inconel 625 chips.