研究了从废催化剂中湿法回收稀土.失效催化剂中稀土的含量约2％～5％,主要包含有镧和铈.实验结果表明,酸浸法能够浸出废催化剂中的稀土.用正交试验得出盐酸浸出实验的最佳条件为:浸出温度、固液比、盐酸浓度、浸出时间分别为30℃、1∶8、4.8mol/L、2h,浸出率高达98.3％.浸出后,浸液pH调到约2,选择性沉淀稀土离子.从废催化剂中回收稀土的全过程总回收率达95％,Al离子也可被回收再利用.
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