Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1975-03-24
1976-10-05
Andrews, R. L.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
204108, 204248, C25B 112, C25B 502, C25B 700
Patent
active
039842959
ABSTRACT:
A method for electrochemically refining copper, which comprises placing a catholyte solution consisting of a copper ion aqueous solution and an anolyte solution consisting of an aqueous dispersion of particles of matte, white metal or blister copper or particles of ferrous hydroxide in an electrolyte in a cathode compartment and the anode compartment, respectively of a galvanic cell partitioned into the cathode compartment and the anode compartment by a diaphragm; and short-circuiting a cathode dipped in the catholytic solution and an anode dipped in the anolyte solution by means of a conductor while maintaining the pH of the catholyte solution at -1 to 5 and the pH of the anolyte solution at 8 to 14, thereby to precipitate pure copper on the cathode.
REFERENCES:
patent: 720235 (1903-02-01), Frasch
patent: 3736238 (1973-05-01), Kruesi et al.
patent: 3787293 (1974-01-01), Kametani
patent: 3836443 (1974-09-01), MacGregor
"The Galvanic Series", Hanson-Van Winkle-Munning Co., 1960.
Aoki Aiko
Kametani Hiroshi
Andrews R. L.
National Research Institute for Metals
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