| abstract |
PROBLEM TO BE SOLVED: To provide a method for efficiently separating Ru from a solution containing a platinum group by oxidative distillation. SOLUTION: A solution containing at least one platinum group among Ru and Pt, Pd, Rh, Ir is adjusted to pH = 0.5 to 2.5, and Ru is converted to ruthenium tetroxide using sodium bromate as an oxidizing agent. Converted and oxidatively distilled, the amount of sodium bromate added in addition to one equivalent required for the oxidation of ruthenium tetroxide from Ru, and the platinum group added excessively so that the concentration of sodium bromate is 80 g / L or more A method for separating and recovering Ru from a solution. [Selection] Figure 1 |