塩素酸ナトリウムおよび次亜塩素酸ナトリウムを用いたパラジウムと白金の選択浸出 Selective Leaching of Platinum and Palladium by Sodium Chlorade and Sodium Hypochlorite
Platinum group metals, such as palladium (Pd) and platinum (Pt), are commonly used in a wide range of industrial applications as an elemental metal and various kinds of alloys. Conventionally, Pt and Pd were dissolved together followed by separation. It is difficult to recovery high-grade Pd and Pt from the primary raw materials and solid wastes. In this study, the selective leaching of Pd and Pt from a secondary resource by using sodium chloride and sodium hypochlorite has been investigated. Results indicate that about 100% of palladium could be initially extracted by using the 0.27 mol / l (active chlorine) sodium hypochlorite and 0.068 mol / l sodium chloride (NaCl) at pH1.2 and 298K in 1.5 hours or 0.005 mol/l sodium chlorate (NaClO<sub>3</sub>) and 6.0 mol / l hydrochloric acid (HCl) at 298K in 0.5 hours. About 100% Pt could be extracted from the residue by using 0.47 mol / l sodium chlorate (NaClO3) and 12 mol / l hydrochloric acid (HCl) at 298K in 2 hours.
- 資源と素材 : 資源・素材学会誌 : journal of the Mining and Materials Processing Institute of Japan
資源と素材 : 資源・素材学会誌 : journal of the Mining and Materials Processing Institute of Japan 118(12), 745-750, 2002-12-25
The Mining and Materials Processing Institute of Japan