| 摘要 |
<p>PURPOSE:To easily and efficiently recover a platinum group metal by passing chlorine while heating the recovered matter consisting of the platinum group metal and base body metal oxide to evaporate the platinum group metal as a chloride and capturing the chloride by a specific inorg. salt. CONSTITUTION:The recovered matter 1 deposited with the platinum group metal on the base body metal oxide is put into a chlorinizing vessel 4 and the vessel 4 is heated by an electric furnace 2. Gaseous chlorine is passed in the furnace from a gaseous chlorine introducing pipe 3 to evaporate the platinum group metal in the form of the chloride. The chloride is captured by a capturing agent of the inorg. salt such as KF packed in a capturing agent layer 5. The capturing agent is taken out and is reduced by using a reducing agent dissolved in water to recover the platinum group metal such as Pt. The inorg. salt of the capturing agent is selected except the chlorine compd. and ammonium salt and the capturing and recovering are executed at the temp. below the m. p. of the capturing agent. The platinum group metal is thus efficiently recovered in a short period of time.</p> |
