Fluorine → Trifluoromethanesulfonic anhydride

Participants

Reaction Steps

Then, the first distillation of Example 1 was repeated, thereby to obtain 363.8 kg of trifluoromethanesulfonic acid anhydride which is colorless and transparent. By chemical analysis, this first distillate was found to have a purity of 97 wt % and contain 2 wt % of trifluoromethanesulfonic acid ester, 1 wt % of trifluoromethanesulfonic acid, up to 5 wt ppm of phosphorus, and 2,440 wt ppm of free fluorine. The actual amount of trifluoromethanesulfonic acid anhydride produced by the reaction was 32.9 kg, and the yield was 70%, based on the amount of trifluoromethanesulfonic acid.

Provenance & Evidence