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Leaching of petroleum catalysts with cyanide for palladium recovery.

Authors
Sibrell-PL; Atkinson-GB
Source
Reno, NV: U.S. Department of the Interior, Bureau of Mines, RI 9535, 1995 Jan; :1-16
Link
NIOSHTIC No.
20039283
Abstract
The U.S. Bureau of Mines has tested cyanide leaching for recovery of Palladium (Pd) from spent petroleum processing catalysts. Three different catalyst samples were supplied by Gemini Industries, a spent catalyst processor. These catalysts consisted of a zeolite base and contained 0.4 to 0.7 pct Pd. During alkaline cyanide leaching, the catalysts exhibited ion exchange properties due to their zeolite matrices. This could present a safety hazard due to the potential for release of toxic hydrogen cyanide gas. The catalyst leach residues passed the Federal Toxicity Characteristic Leaching Procedure and the California Waste Extraction Test, indicating that landfill disposal of the leach residues would be acceptable.
Keywords
Precious-metals; Catalysts; Ion-exchange-resins; Chemical-properties; pH; Pyrolysis; Land-disposal; Palladium; Materials-recovery; Leaching; Cyanide; Waste-disposal
Publication Date
19950101
Document Type
Report of Investigations
Fiscal Year
1995
NTIS Accession No.
PB95-181723
NTIS Price
A03
Identifying No.
RI-9535
NIOSH Division
RERC
Source Name
Reno, NV: U.S. Department of the Interior, Bureau of Mines, RI 9535
State
NV
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