Fluorine → Trifluoromethanesulfonic anhydride

Participants

Reaction Steps

Then, the first distillation of Example 1 was repeated, thereby to obtain 350.5 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 2.9 wt % of trifluoromethanesulfonic acid ester, up to 0.5 wt % of trifluoromethanesulfonic acid, up to 5 wt ppm of phosphorus, and 590 wt ppm of free fluorine. The actual amount of trifluoromethanesulfonic acid anhydride produced by the reaction was 42.4 kg, and the yield was 80%, based on the amount of trifluoromethanesulfonic acid.

Provenance & Evidence