Effect of H3PO4 coordination on vanadium extraction and iron separation in a H2SO4 leaching system

A novel complex acid leaching route for extracting V is proposed. The selectivity of the H 3 PO 4 –H 2 SO 4 system is superior to H 2 SO 4 . Fe 3+ coordinated with PO 4 3− to reduce Fe impurity; H 3 PO 4 –H 2 SO 4 leaching separated the V and Fe.