Electrolysis: processes – compositions used therein – and methods – Electrolytic synthesis – Preparing single metal
Reexamination Certificate
2006-04-25
2006-04-25
Andrews, Melvyn (Department: 1742)
Electrolysis: processes, compositions used therein, and methods
Electrolytic synthesis
Preparing single metal
C205S584000, C205S589000, C075S743000, C075S744000, C204S234000, C266S101000, C266S170000
Reexamination Certificate
active
07033480
ABSTRACT:
The process of the present invention recovers platinum group metal(s), such as platinum and palladium, from PGM-containing materials containing base metals, such as copper and nickel. The process controls sulfur levels by using solvent extraction306to remove acid in the nickel recovery circuit. The acid product326can then be neutralized and/or recycled as desired.
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Andrews Melvyn
Placer Dome Technical Services Limited
Sheridan Ross PC
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