Browse > Article

Reconvery of Platinum Group Metals from Spent Automotive Catalysts by Hydrochloric Acid Leaching  

Lee, Jae-Chun (Minerals & Materials Processing Division, Korea Institute of Geoscience & Mineral Resources(KIGAM))
Jeong, Jin-Ki (Minerals & Materials Processing Division, Korea Institute of Geoscience & Mineral Resources(KIGAM))
Kim, Min-Seuk (Minerals & Materials Processing Division, Korea Institute of Geoscience & Mineral Resources(KIGAM))
Kim, Byung-Su (Minerals & Materials Processing Division, Korea Institute of Geoscience & Mineral Resources(KIGAM))
Kim, Chi-Kwon (Minerals & Materials Processing Division, Korea Institute of Geoscience & Mineral Resources(KIGAM))
Publication Information
Resources Recycling / v.13, no.5, 2004 , pp. 28-36 More about this Journal
Abstract
The extraction of platinum group metals such as Pt, Pd and Rh from spent automobile catalyst has been investigated by leaching in HCl solutions using $HNO_3$ or NaOCl as a oxidant. The effect of type and amount of oxidant, reaction time and pulp density on the extraction of platinum group metals was examined. Platinum group metals were recovered by the cementation method using aluminum as a reducing agent. The extraction ratio was higher when NaOCl was used as a oxidant. The optimum leaching conditions were obtained to be: HCl 8 M, the amount of NaOCl 1.4 mole, leaching temperature $90^{\circ}C$, leaching time 180 minutes, pulp density 400g/L. Under the optimum conditions, the extraction of Pt, Pd and Rh were 96.1%, 93.6% and 77.3%, respectively. With the addition of 2.0g of aluminum which corresponds to 28 equivalent the reduction were 98% for Pt. 98.8% for Pd and 65.3% for Rh, respectively.
Keywords
spent automotive catalyst; platinum group metals; hydrochloric acid leaching; recovery;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Mishra, R.K., 1989: Recovery of platinum group metaIs from automobile catalytic converters-A review, Precious Metals '89, ed. by Jha. M.C. and Hill. S.D., pp. 483-501, TMS-AIME, Warrendale, PA, USA
2 Mishra, R.K., 1993: A review, of platinum group metals recovery from automobile catalytic converters, Precious Metals 1993, ed. by Mishra, R.K., pp. 449-474, Proc. of IPMI Conference, Newport, RI, USA. June 13-16, 1993
3 Meng, X. and Han, K.N., 1995: Recovery of platinum and palladium from spent automobile catalyst converters by leaching with solutions containing halogen salts, ammonia and oxidants, Prodeedings of Third International Symposium on Recycling of Metals and Engineered Materials. ed. by Queneau, P.B. and Peterson, R.D., pp. 501-513, TMS, Point Clear, Alabama, Nov 12-15, 1995
4 Smith, E.A., 1987: Assay of the platinum-group metals, The Sampling and Assay of the Precious Metals, 2nd edition, pp. 408-459, Met-Chem Research, Inc., Boulder, Colorado, USA
5 Bonucci, J.A. and Parker, P.D., 1984: Recovery of PGM from automobile catalytic converters, Precious Metals: Mining, Extraction, and Processing, ed. by Kudryk, V., Corrigan, D.A. and Liang, W.W., pp. 463-482, Proc. of AIME/IPMl Precious Metals Symposium, Los Angeles, CA, USA
6 Bradford, C.W. and Baldwin, S.G., 1975: Recovery of precious metals from exhaust catalysts, Brit. Patent No. 1517270
7 Tyson. D.R. and Bautista, R.G., 1987: Leaching kinetics of platinum and pualladium from spent automotive catalysts, Separation Science and Technology, 22(2&3), pp. 1149-1167   DOI   ScienceOn
8 Lee, J.C.. 1993: Technical review on recovering Platinumgroup metals from spent automotive catalysts, Bull. of the Korean Institute of Metal & Materials. 6(4), pp. 384-392
9 Kuczynski, R.J., Atkinson, G.B., and Dolinar, W.J., 1995: High-temperature cyanide leaching of platinum-group metals from automobile cataIysts-Pilot plant, U.S. Bureau of Mines Report of Investigations 9543
10 Kendall, T., 2003: Platinum 2003, Johnson Matthey, London, UK
11 Atkinson, G.B. et aI., 1989: Recovery of PGM from virgin automotive catalysts by cyanide leaching, Platinum Group Metals and the Quality of Life, ed. by Austin, A., Barnard, C.M., and Haslam, E., pp. 109-118, IPMI, Las Vegas, NV, USA, Jan. 29-31, 1989
12 Robson, G.G. and Smith, F.J., 1988: Platinum 1988, pp. 64, Johnson Matthey, London, UK
13 Desmond, D.P. et aI., 1991: Hieh-temperature cyanide leaching of platinum-group metals from automobile catalysts-Laboratory tests, U.S. Bureau of Mines Report of Investigations 9384
14 Hoffman, J.E., 1988: Recovering pIatinum group metals from autocatalyst, Journal of metals, 40, pp. 40-44