Process for the electrochemical recovery of the metals copper, z

Details Process for the electrochemical recovery of the metals copper, z Process for the electrochemical recovery of the metals copper, z

1995-10-27

1998-02-24

Gorgos, Kathryn L.

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Treating process fluid by means other than agitation or...

205101, 205269, 205271, 205291, 205299, 205305, 205561, 205574, 205575, 205576, 205587, 205588, 205594, 205597, 205598, 205602, 205603, 204237, 204242, 204283, 204284, 204286, C25D 2106, C25D 2118, C25D 1500, C25D 900

Patent

active

057208670

ABSTRACT:
An electrolytic cell comprising bipolar electrodes is employed for electrochemical deposition of copper, zinc, lead, nickel or cobalt. An interior space is provided between the cathode side and the anode side of a bipolar electrode. The electrolyte can flow substantially without an obstruction through the interelectrode space between adjacent electrodes. The current densities in the interelectrode space amount to 800 to 8000 A/m.sup.2. Gas is evolved on the anode side of the bipolar electrodes and causes liquid to flow along the anode side. In the middle of the height of the anode side that liquid flow has a vertical component having a velocity of 5 to 100 cm/second. Electrolyte solution flows from the upper edge portion of the anode side to a return flow space, in which the solution flows downwardly. From the return flow space the solution is returned to the lower portion of the interelectrode space.

REFERENCES:
Graydon et al., "Suspension Codeposition in Electrowinning Cells: The Role of Hydrodynamics", Can. Chem. Eng., 69 (2), pp. 564-570, 1991.
Mohanta et al., "The Effect of Anodic Bubble Formation on Cathodic Mass Transfer Under Natural Convection Conditions", J. Appl. Electrochem., 7(3), 235-8, 1977.
Graydon et al., "Suspension Codeposition in Electrowinning Cells: The Role of Hydrodynamics", Can. Chem. Eng., 69(2), 564-570, 1991.
"The effect of anodic bubble formation on cathodic mass transfer under natural convection conditions"; Mohanta, S.; Fahidy, T. Z.; J. Appl. Electrochem. 7 (1977) pp. 235-238, which is the underlying publication in Mohanta et al no month available.
"Suspension codeposition in electrowinning cells: the role of hydrodynamics"; Graydon, J. W.; Kirk, D. W.; Can. J. Chem. Eng.; vol. 69; pp. 564-570 (1991) which is the underlying publication in Graydon et al., no month available.
"Ullmann's Encyclopedia of Industrial Chemistry", Fifth, Completely Revised Edition; vol. A9; Dithiocarbamic Acid to Ethanol; Wolfgang Gerhartz et al; 23 pages (no date).

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