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发明公开
CN102586606A 从含钒镍的废FCC/ROC触媒中回收稀土、钒、镍的方法 无效 - 撤回

从含钒镍的废FCC/ROC触媒中回收稀土、钒、镍的方法
摘要：
本发明公开了从含钒镍的废FCC/ROC触媒中回收稀土、钒、镍的方法。所述含钒镍的废FCC/ROC触媒的成分重量百分含量为：Al2O340-60％、SiO210-25％、V 0.1-1％、Ni 0.1-1％、REO 2-5％，本方法是将含钒镍之废FCC/ROC触媒，以硫酸为主要溶剂在90-95℃下酸浸，之后以复盐沉淀方式沉淀富液中的稀土，经碱转换后，以盐酸酸溶，再经草酸、碳酸氢铵沉淀获得稀土产品；另外，复盐沉淀稀土后的钒、镍贵液，以调整pH值及离子交换方式各分别回收。本发明的优点：1.本发明以简单、环保、高效能的技术与予回收，制程中不但高效率的回收钒、镍且有效将稀土再利用。2.本发明制程简单、更节省成本、不污染环境、各回收产品纯度高。
摘要（英）：

The present invention discloses a method for recovering rare earth, vanadium and nickel from waste FCC/ROC catalytic agent containing vanadium and nickel. The waste FCC/ROC catalytic agent containing vanadium and nickel has compositions as follows by weight: 40%-60% of Al2O3, 10%-25% of SiO2, 0.1%-1% of V, 0.1%-1% of Ni, and 2%-5% of REO. The method comprises the steps of: performing acid leaching for the waste FCC/ROC catalytic agent containing vanadium and nickel by taking sulfuric acid as a primary solvent; precipitating rare earth in pregnant solution in the way of composite salt precipitation; performing conversion by using alkali; performing acid dissolution by using hydrochloric acid; and performing precipitation through oxalic acid and ammonium hydrogen carbonate to obtain rare earth product. In addition, vanadium and nickel pregnant solution obtained by precipitating the rare earth in the way of composite salt precipitation can be respectively recovered. The present invention has the advantages of simple process, cost saving, no environment pollution, and high purity of recovered product.

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