|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals, and Materials
||Recovery of Palladium from Spent Pd/Al2O3 Catalyst by Hydrochloric Acid Leaching
||Yang Yong-bin, Hu Long, Li Qian, Xu Bin, Rao Xue-fei, Jiang Tao
|On-Site Speaker (Planned)
Spent Pd/Al2O3 catalyst is an important secondary resource of palladium metals. The high efficient recovery of palladium was hard to implement due to the wrapping of catalyst carriers, accumulating carbon on surface and existing in stable palladium oxide. An effective process for palladium recovery was investigated. Samples are initially roasted to eliminate carbon. Then, the calcine is reduced with hydrazine hydrate for the purpose of transferring palladium oxide to palladium. The reduced residue is further leached using hydrochloric acid with sodium chlorate as oxidant to recover palladium. The results show that the palladium extraction only reached 16.24% by direct leaching and 43.51% by roasting-leaching. However, it achieved 98.71% by roasting-reduction-leaching under the appropriate leaching conditions of HCl 6M, NaClO3 3g/L at 95°C for 2h. Additionally, the feasible conditions involved in roasting and reduction steps were also investigated.
||Planned: A print-only volume