|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals, and Materials
||LL-59: Recovery of Palladium and Aluminum from Spent Catalysts by Roasting-leaching
||Li Qian, Rao Xue-fei, Yang Yong-bin, Xu Bin, Hu Long, Jiang Tao
|On-Site Speaker (Planned)
The spent catalysts containing platinum group metals (PGMs) is one of the precious secondary resources. Recovery of PGMs from spent catalysts by an economic and effective method is a significant subject. The spent Pd/Al2O3 catalysts used in this study contains more than 2120g/t Pd, 9% C and 76% Al2O3, it was treated by roasting-water leaching method in order to dissolve the alumina in spent catalysts. Aluminum can be recovered from the leaching solution and palladium was then enriched in the residues for further recovery. The result showed that the decoking ratio of the spent catalysts was almost 100% after roasting at 550℃ for 80min. The calcine was roasted with 54.5% (wt. %) of sodium hydroxide at 800℃ for 2h, then leached at 95℃for 0.5 h．The dissolution percentage of alumina was over 98% and meanwhile the palladium content was over 46000g/t in the residues.
||Planned: A print-only volume