PROCESS FOR REMOVING HEAVY METAL IONS AND ARSENIC FROM WET-PROCESSED PHOSPHORIC ACID

摘要

PROCESS FOR REMOVING HEAVY METAL IONS AND ARSENIC FROM WET-PROCESSED PHOSPHORIC ACID The disclosure relates to a process for removing heavy metal ions and arsenic from wet-processed phosphoric acid, wherein the crude wet processed phosphoric acid is treated at temperatures between 10 and 100.degree.C initially with a diorganyldithiophosphoric acid ester and then with an adsorbent, and the phosphoric acid so purified is separated from the ester and adsorbent. More particularly, the wet-processed phosphoric acid is treated with the diorganyldithiophosphoric acid ester at temperatures higher than 50.degree.C and with the adsorbent at temperatures lower than 50.degree.C.