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Method or process for recovering Mo, V, Ni, Co and Al from spent catalysts using ultrasonic assisted leaching with EDTA
Method or process for recovering Mo, V, Ni, Co and Al from spent catalysts using ultrasonic assisted leaching with EDTA
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机译:使用EDTA超声辅助浸出从废催化剂中回收Mo,V,Ni,Co和Al的方法或工艺
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摘要
A process for the selective recovery of Mo, V, Ni, Co and Al from spent hydroprocessing catalysts includes the steps of treating the spent catalysts to recovery metals, support as well as chemicals. The process steps include deoiling, decoking, washing, dissolving, complexing agent treatment, acid treatment and solvent extraction. This process uses limited steps than conventional processes by the use of ultrasonic agitation for metal extraction and the presence of a chelating agent particularly Ethylene Diamine Tetra-Acetic Acid (EDTA). The process also discloses the compete recovery of the extracting agent EDTA with high purity for reuse.
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