Solvent extraction is an advanced and important methord of producing platinum metals and recovering them from secondary resources. While the properties of platinum and iridium are similar, especially the extraction behavior of Pt(Ⅳ) and Ir(Ⅳ) is so close that the separation of them is difficult.But the extraction behavior of Ir(Ⅲ) and Pt(Ⅳ) is different.So we must choose the right reducer deoxidation iridium to separate platinum and iridium by solvent extiaction .Another choosing the right anti-extractant i...