| 摘要 |
<p>PURPOSE: To provide a method for concentrating a platinum-group metal contained in a spent catalyst into an alloy easy to crush without adding an absorbent such as copper and iron. CONSTITUTION: A spent catalyst contg. a platinum-group metal, an iron-family metal and phosphorus in its carrier consisting essentially of alumina, CaO as salt and coke as reducing agent are heated and melted to form a slag phase and a metallic phase, the platinum-group metal is concentrated in an iron alloy consisting essentially of an iron-family metal and phosphorus and easy to crush, and the platinum-group metal is concentrated from the spent catalyst. Consequently, the platinum-group metal contained in the spent catalyst from an automobile is concentrated by 98% in an iron alloy easy to crush and suitable to wet refining without adding an absorptive metal.</p> |
