Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1975-11-10
1977-05-31
Tufarielio, T. M.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
204237, 204272, C25C 122, C25C 100
Patent
active
040267849
ABSTRACT:
An improved metal recovery unit for recovering metal from metal-laden liquids by electrolysis. The metal recovery unit comprises container means including a tubular cathode defining an upright substantially cylindrical wall having a top end closed by cover means and a bottom end closed by base means. In one embodiment, metal-laden liquid is introduced into the container means through a first opening in the cover means disposed generally adjacent the anode. Metal-depleted fluid is withdrawn from the container means through a further opening in the cover means at a location spaced apart from the first opening. An elongated anode is concentrically disposed within the cathode. The liquid within the container is recirculated by continually withdrawing a portion thereof from a passageway in the base means and reintroducing such fluid into the container means through an inlet passage in the cover means tangentially and angularly downward with respect to the cathode wall to develop a generally downwardly helical flow path of liquid adjacent the cathode. Control means provides at least first and second current densities at the cathode for depositing metal on the cathode at a reduced rate as metal is depleted from the recirculated fluid.
REFERENCES:
patent: 2997438 (1961-08-01), James et al.
patent: 3003942 (1961-10-01), Cedrone
patent: 3061537 (1962-10-01), Yagishita
patent: 3694341 (1972-09-01), Luck, Jr.
patent: 3728244 (1973-04-01), Cooley
patent: 3871989 (1975-03-01), King
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