Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1977-12-22
1980-01-15
Tufariello, T. M.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
204 10, C25C 116, C25C 708
Patent
active
041837940
ABSTRACT:
A method of extracting primary zinc metal from ore concentrates is described. The method includes providing first and second electrolytic cells, the first cell receiving an acid zinc sulfate solution derived from an ore concentrate, and having an anode which is insoluble in said solution, and the second cell containing an alkaline electrolyte and having a cathode which is insoluble in said electrolyte. A common electrode is also provided which is insoluble both in the acid zinc sulfate solution and in the alkaline electrolyte. The common electrode can be transferred between the first cell, in which it acts as a cathode, and the second cell, in which it acts as an anode. The zinc sulfate solution is subjected to electrolysis in the first cell with the common electrode acting as a cathode, thereby causing primary zinc metal to be deposited as a coating on the common electrode. The coated common electrode is transferred from the first cell to the second cell and the alkaline electrolyte in the second cell is subjected to electrolysis so that the primary zinc metal is transferred from the common electrode to the cathode of the second cell in a sponge-like form. The zinc sponge is mechanically removed from the cathode of the second cell.
REFERENCES:
patent: 467484 (1892-01-01), Stalmann
patent: 923411 (1909-06-01), Cowper-Coles
patent: 1255435 (1918-02-01), Laist et al.
patent: 1301832 (1919-04-01), Gerber
patent: 2313338 (1943-03-01), Hannay
patent: 3326783 (1967-06-01), Winter
Metal Treatment and Drop Forging, Summer 1950, pp. 118-122, 124, 126, 52.
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