abstract |
The present invention is based in part on the discovery that the presence of impurities in 1,1,2,3-tetrachloropropene (1230xa) results in the formation of 2-chloro-3,3,3-trifluoropropene Lt; RTI ID = 0.0 > fluorination. ≪ / RTI > By substantially eliminating the impurities, the catalyst lifetime is prolonged and, as a result, the efficiency of the operation of the fluorination reaction is improved. This step similarly leads to an overall improvement in the preparation of certain hydrofluoroolefins, especially 2,3,3,3-tetrafluoropropene (1234yf). |