Iron Removal from Phosphoric Acid by Paramagnetism

Abstract

Abstract A two-step separation technique was used in the laboratory to purify industrial grade phosphoric acid. Step 1 used a hydrocyclone, and step 2 used paramagetism. A total of 78.4% of the iron was removed without loss of phosphorus, mostly through step 1. In addition, 13% of the initial chromium was removed. Probably recycling or enhanced fields would enhance the removal of iron and chromium.