| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing trifluoromethanesulfonic anhydride, by which the trifluoromethanesulfonic anhydride useful for medical treatments, as a raw material for synthesizing polymerization initiator and the like, can efficiently be produced. SOLUTION: This method for producing the trifluoromethanesulfonic anhydride, characterized by reacting trifluoromethanesulfonic acid with phosphorus pentaoxide, distilling the produced trifluoromethanesulfonic anhydride, further adding phosphorus pentaoxide to the distillate, refluxing, and distilling or vacuum-distilling to purify the trifluoromethanesulfonic anhydride.
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