Fluorination process and reactor

The present invention relates to a process for preparing tetra halopropene such as 2-chloro-3,3,3-trifluoropropene (1233xf). The method 1,1,2,3 feed material such as tetrachloropropene (1230xa) and atomized and mixed with HF overheated it to form a vaporized product feed and HF , causing substantially simultaneous contact with the vapor phase fluorination catalyst. The present invention extends the catalyst life, prevent deactivation of the catalyst. .FIELD 1