钯
浸出(土壤学)
催化作用
渗滤液
贵金属
铂金
废物管理
化学
冶金
环境科学
材料科学
工程类
有机化学
土壤科学
土壤水分
作者
Bin Xu,Yufeng Chen,Yujuan Zhou,Bangsheng Zhang,Guiqing Liu,Qian Li,Yongbin Yang,Tao Jiang
出处
期刊:Metals
[MDPI AG]
日期:2022-03-22
卷期号:12 (4): 533-533
被引量:23
摘要
The spent automobile catalysts (SAC) is the major secondary source of palladium and the production of SAC is increasing rapidly over years. The price of palladium keeps rising over the years, which demonstrates its preciousness and urgent industrial demand. Recovering palladium from the spent automobile catalysts benefits a lot from economic and environmental protection aspects. This review aims to provide some new considerations of recovering palladium from the spent automotive catalysts by summarizing and discussing both hydrometallurgical and pyrometallurgical methods. The processes of pretreatment, leaching/extraction, and separation/recovery of palladium from the spent catalysts are introduced, and related reaction mechanisms and process flows are given, especially detailed for hydrometallurgical methods. Hydrometallurgical methods such as chloride leaching with oxidants possess a high selectivity of palladium and low consumption of energy, and are cost-effective and flexible for different volume feeds compared with pyrometallurgical methods. The recovery ratios of palladium and other platinum-group metals should be the focus of competition since their prices have been rapidly increased over the years, and hence more efficient extractants with high selectivity of palladium even in the complexed leachate should be proposed in the future.
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