| abstract |
A method for recovering metals from materials containing refractory and/or transition metals, particularly spent catalysts containing same, by selectively chlorinating the above-mentioned catalysts with a gaseous mixture selected from chlorine and air, chlorine and inert gas, chlorine and inert gas with reducing gas, or chlorine and inert gas with air, at a temperature of approximately 250-600 °C and at a total pressure of approximately 10-300 kPa.___ |