Method of defluorinating phosphoric acid

A method of defluorinating phosphoric acid comprising contacting the fluorine containing phosphoric acid in solution in a substantially water immiscible organic solvent with an aqueous medium containing in solution 0.2 to 5% by weight of a soluble compound of a metal selected from the group consisting of Al, Fe, Ti and Zr whereby phosphoric acid remains in the organic solvent while fluorine compounds are extracted from the organic solvent into the aqueous medium, separating the aqueous medium containing the fluorine compound from the organic solution containing the phosphoric acid, regenerating the separated organic solution by contact with an aqueous phase whereby phosphoric acid is extracted from the organic solution into the aqueous phase, and then separating the aqueous phase comprising phosphoric acid in which the fluorine content is less than 10 p.p.m. relative to the P.sub.2 O.sub.5.