Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1988-02-01
1990-03-27
Niebling, John F.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
204109, 204106, 204114, 204130, 204267, 204269, 204275, 204290R, 204292, 204294, C25C 112
Patent
active
049118048
ABSTRACT:
A system for treating a barren solution typically containing a heavy metal such as copper, and complexed cyanide, from a precious metal mill, is treated in a first electrochemical cell to remove the heavy metal and free the cyanide whereafter the treated solution can be returned to the precious metal mill as leaching solution; the barren solution flows through a porous cathode in which the heavy metal is electrochemically deposited, and against an inert anode; the deposited heavy metal is recovered in a sheet form by employing the heavy metal loaded cathode as an anode in a second electrochemical cell, the heavy metal entering solution and being deposited on a cathode sheet typically of stainless steel or titanium from which a deposited sheet of the heavy metal is readily peeled; the porous cathode free of heavy metal can be reused in the first cell.
REFERENCES:
patent: 4226685 (1980-10-01), Portal et al.
patent: 4396474 (1983-08-01), Astruc et al.
patent: 4445990 (1984-05-01), Kim et al.
patent: 4556469 (1985-12-01), Kim et al.
Celec Inc.
Niebling John F.
Ryser David G.
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