Spent automotive exhaust catalysts are important secondary resources for recycling platinum group metals(PtPdRh).This paper described the process flow currently used in the recovery of PGMs from spent automotive exhaust catalysts,including pretreatment of spent catalysts,enrichment of platinum group metals,and refining and separation.In particular,two highly efficient pretreatment technologies,two types of enrichment methods,and four mainstream spent refining and processes were introduced in detail.The principles involved in process flow,advantages and disadvantages of each method,as well as the improvement directions in future were also explored and discussued.It is suggested that recycling enterprises should adopt suitable recycling processes according to the recycling scale and environmental protection policies to achieve a maximum gain among different recycling processes.and clean recycling processes with high recovery rates should be focused in the future.
关键词
铂族金属/失效汽车尾气催化剂/富集/分离与提纯
Key words
platinum group metals(PGMs)/spent automotive exhaust catalysts/enrichment/separation and purification
维普
万方数据