Process for the purification of sodium trifluoromethanesulfinate and -sulfonate.

摘要

Process for the purification of sodium trifluoromethanesulphinate. his process is characterised in that it comprises the stage of bringing a mixture of solids containing at least one salt of halohydric acid and a salt of triflinic acid into contact with an organic phase containing: - a) a polar solvent not miscible with water in any proportion, chosen from the group consisting of alcohols, ketones and esters whose boiling point at atmospheric pressure is lower than 200 DEG C, preferably lower than 150 DEG C, and mixtures thereof; - b) an aromatic solvent chosen from the group of solvents whose boiling point is lower than 200 DEG C, preferably lower than 150 DEG C, and mixtures thereof. Application to the synthesis of triflic acid.