The invention relates to a method for continuously synthesizing
trifluoroacetyl chloride and
sulfuryl fluoride, which comprises the following process: continuously introducing
sulfur trioxide and trifluorotrichloroethane (F113a) into a reaction rectifying
tower containing a catalyst and a filler thorough the lower part in the
tower according to a mol ratio of 1:1, wherein the temperature of the
tower is controlled to range between 120 DEG C and 130 DEG C, and the
reflux ratio at the top of the tower is 2.5-3; introducing tower bottoms into a
sulfuryl chloride separating tower for rectification and separation, wherein the tower temperature is 145-150 DEG C, and the
reflux ratio is 0.5-1.0; returning pyrosulfuryl
chloride in the separating tower to the middle upper part of the reaction rectifying tower, heating the
sulfuryl chloride rectified off from the top of the tower to 150 DEG C, and then introducing the rectified
sulfuryl chloride and preheated recycled and newly-added
hydrogen fluoride gas into a reactor containing a
palladium /
charcoal catalyst, wherein the
reaction temperature is controlled to range between 150 DEG C and 160 DEG C; separating out unreacted
hydrogen fluoride from the
reaction product through a
cold trap, and returning to the reactor for further use; and then absorbing and separating
hydrogen chloride through a falling film,
drying, compressing, and condensing to obtain the
sulfuryl fluoride. The invention has the
advantage of easy acquisition of raw materials, and the
sulfuryl chloride byproduct can be directly used for the synthesis of
sulfuryl fluoride.