| 摘要 |
<p>PURPOSE:To conveniently and efficiently recover Ru from a recovered material by converting the Ru and the oxide of the base metal in the recovered material into the chlorides with gaseous chlonrine while heating the material in the presence of carbon or CO, and separating the chlorides by utilizing the difference in vapor pressure. CONSTITUTION:The recovered material contg. Ru or its oxide and the oxide of the base metal is mixed with carbon powder, the mixture 1 is charged in a chloride forming vessel 4, and gaseous Cl2 is introduced from an inlet pipe 5 and the bottom of the vessel 4 through glass fiber 3 while heating the material by an electric furnace 2. Consequently, the Ru and its oxide and the oxide of the base metal are converted into the chlorides. The heating temp. is controlled to a temp. higher than the b.p. of the chloride of the base metal, or preferably to 400-1,200 deg.C. As a result, the chloride of the base material is evaporated and separated due to the difference in vapor pressure, and recovered in a collection tank 7 through a cooling pipe 6. Meanwhile, the Ru chloride is decomposed by reducing the Cl2 partial pressure to form metallic Ru, and Ru is recovered.</p> |
