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Cyanide leaching method for recovering platinum group metals from a catalytic converter catalyst.

Authors
Atkinson-GB; Kuczyns-RJ; Desmond-DP
Source
U S Patent 5,160,711 1992 Nov :1-8
NIOSHTIC No.
10012075
Abstract
A method for recovering platinum group metals from a catalyst material comprises leaching the material with a cyanide solution at a temperature greater than about 100.degree. C. to form soluble platinum group metal-cyanide complexes in solution. Solids are removed from the resulting pregnant leach solution, and the pregnant leach solution is then heated to a temperature sufficient to decompose the platinum group metal-cyanide complexes and precipitate the platinum group metals.
Keywords
Mining-industry; Environmental-contamination; Platinum-compounds; Cyanides; Cyanide-compounds; Metal-compounds; Metallurgical-processes; Metallurgy
CAS No.
7440-06-4
Publication Date
19921103
Document Type
Patent
Fiscal Year
1993
NTIS Accession No.
NTIS Price
Identifying No.
OP 285-92
NIOSH Division
RERC
Source Name
U.S. Patent No. 5,160,711, Nov. 3, 1992
State
NV
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