Decreasing Iron Content from Egyptian Wet Process Phosphoric Acid using Organic Solvent Extraction

The solvent extraction of iron from Egyptian wet process phosphoric acid using di-ethylhexyl phosphoric acid was investigated. The effect of the phosphoric acid concentration, organic solvent concentration, organic to aqueous phase ratio, temperature and stirring time were studied. 69.3% iron removal efficiency from 2.0 M phosphoric acid (12% P2O5) was obtained using 2.0 M D2EHPA and organic to aqueous phase ratio 2:1 for stirring time 5 min. under room temperature while the iron removal efficiency percent increases to be 99.9% by applying the recommended optimum conditions on another type of phosphoric acid partially purified by solvent extraction technique using mixture of butanol and octanol.