Recovery of rare earth elements from spent fluid catalytic cracking catalysts using leaching and solvent extraction techniques

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• 作者：Zhexuan Zhao ; Zhaofu Qiu ; ^{zfqiu@ecust.edu.cn} ; Ji Yang ; Shuguang Lu ; Limei Cao ; Wei Zhang ; Yongye Xu
• 关键词：Spent fluid catalytic cracking catalyst ; Rare earth ; Leaching ; Extraction
• 刊名：Hydrometallurgy
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：167
• 期：Complete
• 页码：183-188
• 全文大小：753 K
• 卷排序：167

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.