文摘
An efficient method to recover REEs from spent FCC catalyst was HCl leaching, followed by D2EHPA extraction. Under the optimal conditions, the leaching efficiency and extraction efficiency of REEs were 99.3% and 85.1% respectively. Effect of organics of spent FCC catalyst on REEs leaching was investigated. The biggest obstacle to separate REEs from the leachate was Al3 + with high concentration. D2EHPA and HEHEHP showed big different extraction efficiencies on REEs while small on Al.