Process for producing 2,3,3,3-tetrafluoropropene

Abstract

The present invention relates, in part, to the discovery that, during the fluorination of certain fluoroolefin starting reagents, oligomerization/polymerization of such reagents reduces the conversion process and leads to increased catalyst deactivation. The present invention also illustrates that vaporizing such starting reagents in the presence of one or more organic co-feed reduces such oligomerization/polymerization and improves catalytic stability.

1 . A composition comprising:
 (i) at least one compound of Formula I, II or III:
   CX 2 ═CCl—CH 2 X  (Formula I)
 
   CX 3 —CCl═CH 2   (Formula II)
 
   CX 3 —CHCl—CH 2 X  (Formula III)
 
   
       wherein X is independently selected from F, Cl, Br, and I provided that at least one X is not F; and
 (ii) at least one or more organic compounds selected from trichlorofluoropropene (1231), 1,2-dichloro-3,3,3-trifluoropropene (1223xd), 2-chloro-3,3,3-trifluoropropene (1233xf), 2-chloro-1,1,1,2-tetrachloropropane (244bb), 1,1,1,2,2-pentafluoropropane (HFC-245cb), difluoromethane (HFC-32), pentafluoroethane (HFC-125), 1,1,1,2-tetrafluoroethane (HFC-134a), trifluoroethane (HFC-143) (including all isomers thereof), and 1,1,1,3,3-pentafluoropropane (HFC-245fa) and combinations thereof. 
 
     
     
         2 . The composition of  claim 1 , wherein the compound of Formula I comprises 1,1,2,3-tetrachloropropene (1230xa); the compound of Formula II comprises 2,3,3,3-tetrachloropropene (1230xf); and the compound of Formula III comprises 1,1,1,2,3-pentachloropropane (240db). 
     
     
         3 . The composition of  claim 1 , wherein the at least one or more organic compounds are present in an amount ranging from 1 to 50 wt %. 
     
     
         4 . The composition of  claim 3 , wherein the at least one or more organic compounds are present in an amount ranging from 3 to 30 wt %. 
     
     
         5 . The composition of  claim 3 , wherein the at least one or more organic compounds are present in an amount ranging from 5 to 15 wt %. 
     
     
         6 . A composition comprising:
 (i) 2,3-dichloro-3,3-difluoropropene (1233xf); and   (ii) at least one or more organic compounds selected from 1,2-dichloro-3,3,3-trifluoropropene (1223xd), trichlorofluoropropene (1231) isomers, 2-chloro-1,1,1,2-tetrafluoropropane (244bb) and unreacted 1,1,2,3-tetrachloropropene (1230xa), 2,3,3,3-tetrachloropropene (1230xf) and 1,1,1,2,3-pentachloropropane (240db).   
     
     
         7 . The composition of  claim 6  further comprising HCl. 
     
     
         8 . The composition of  claim 6  further comprising HF.