Research Status of Hydrometallurgical Recovery and Enrichment Process for Palladium Containing Waste Catalysts
In order to reduce China's external dependence on resources,the focus of domestic palladium supply is gradually shifting towards the recycling and utilization of secondary resources containing palladium.Based on this,combined with the pretreatment method of palladium containing waste catalysts of common carriers,such as carbon carrier,alumina carrier,and cordierite carrier,this paper reviews the current status of hydrometallurgical recovery and enrichment processes.According to the different characteristics of the carrier,the pretreated waste catalyst is enriched using different methods,including carrier dissolution method,active component dissolution method,total dissolution method,displacement method,ion exchange method,and solution extraction method.
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