High-temperature cyanide leaching of platinum-group metals from automobile catalysts: pilot plant study.
Kuczynski-RJ; Atkinson-GB; Dolinar-WJ
Reno, NV: U.S. Department of the Interior, Bureau of Mines, RI 9543, 1995 Jan; :1-25
The U.S. Bureau of Mines Reno Research Center operated a batch pilot plant to demonstrate high-temperature cyanide leaching or recovering platinum group metals (PGM) from automobile catalysts. Approximately 1,600 kg of used pellet, monolith, and metal support catalyst containing 1,700 g (54 tr oz) of PGM were processed. Average extractions from the used pellet catalyst were 96 pct Pt, 95 pct Pd, and 73 pct Rh. Heating destroyed cyanide to less than 0.2 mg/L free and total cyanide. Both the pellet and monolith residues were evaluated for disposal using the EPA Toxicity Characteristic Leaching Procedure (TCLP).
Chemical-reactions; Catalysts; Cyanide; Exhaust-systems; Catalytic-effects; Waste-processing; Leaching; High-temperature; Catalytic-converters; Platinum; Materials-recovery
Report of Investigations
NTIS Accession No.
Reno, NV: U.S. Department of the Interior, Bureau of Mines, RI 9543