Process for the purification of wet phosphoric acid

摘要

Raw wet phosphoric acid which has been extracted from the solvent and regenerated with water according to the process of U.S. Pat. No. 3,607,029 is subsequently subjected to treatment with steam or a hot gas to afford concentrated phosphoric acid with a F/P2O5 ratio of less than 10 ppm. The acid obtained is suitable for use in the food industry.