Fluorine → Trifluoromethanesulfonic anhydride

Participants

Reaction Steps

Then, the first distillation of Example 1 was repeated, thereby to obtain 164.7 kg of trifluoromethanesulfonic acid anhydride which is colorless and transparent. By chemical analysis, this first distillate was found to have a purity of 98 wt % and contain 1.0 wt % of trifluoromethanesulfonic acid ester, 1.0 wt % of trifluoromethanesulfonic acid, up to 5 wt ppm of phosphorus, and 620 wt ppm of free fluorine. The actual amount of trifluoromethanesulfonic acid anhydride produced by the reaction was 33.4 kg, and the yield was 71%, based on the amount of trifluoromethanesulfonic acid.

Provenance & Evidence