Synthesis device of phosphorus pentafluoride

The utility model provides a phosphorus pentafluoride synthesis device which comprises a container and a rotary driving device, a reaction cavity is formed in the container, and a feeding hole and an air outlet which are communicated with the reaction cavity are formed in the top of the container; the stirring device comprises a stirring shaft which is vertically arranged in the reaction cavity, and a plurality of groups of stirring blades which are vertically arranged on the outer wall of the stirring shaft at intervals, and the upper end of the stirring shaft is connected with the rotary driving device; the multiple groups of air inlet structures are vertically arranged at intervals, each air inlet structure comprises an air inlet pipe, one end of each air inlet pipe penetrates through the side wall of the container, the other end of each air inlet pipe extends to the position above each group of stirring blades, the bottom of each air inlet pipe communicates with an air inlet disc, and a plurality of air i