Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1976-08-23
1978-06-27
Andrews, R. L.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
204 32R, 204 29, 204 40, 204 49, C25C 120, C25D 542
Patent
active
040973476
ABSTRACT:
A titanium or tantalum cathode which has a nickel coat on it is used for the electrolytic recovery of gold from solution. The gold is stripped from the cathode by use of aqua regia which strips the nickel coat but does not affect the underlying titanium or tantalum. The amount of nickel is only enough to prevent destructive hydrogen absorption by the titanium or tantalum and is not enough to significantly contaminate the recovered gold. The cathode can then be reused by applying a new nickel coat and repeating the process.
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Electroplating Engineering Handbook, Second Ed., A. K. Graham et al., 1962, p. 234.
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