| 摘要 |
A method of recovering catalyst metals from a catalyst containing a chalcogen element. The method includes: a chalcogen element ingredient removal step in which the electrode catalyst is heated in a hydrogen-containing inert gas to remove the chalcogen element from the electrode catalyst; and a carbon ingredient removal step in which the electrode catalyst is then immersed in hot aqua regia to remove a carbon ingredient therefrom. A metal ingredient which has dissolved in the aqua regia is recovered, and another metal ingredient is recovered from the sediment remaining undissolved in the aqua regia. Thus, the catalyst metals which are components of a spent catalyst containing a chalcogen element are recovered from the chalcogen-element-containing catalyst in a pollution-free manner. Furthermore, the catalyst metals, which are scarce and expensive, are efficiently reutilized. |
