Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1978-04-13
1979-04-17
Ozaki, G.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
75101R, 75109, 75117, 75120, 204115, 423 36, 423 99, C22B 1512, C22B 1922
Patent
active
041499450
ABSTRACT:
A process for winning copper and zinc from brass mill waste products containing oxidic copper and zinc, iron, nickel, or cobalt. The feed material is leached in sulfuric acid, neutralized to a pH between about 2.5 and 3.0, and treated with zinc metal to precipitate copper. After separation of the copper product, residual copper as well as iron and cobalt are removed in a second, oxygen-free, cementation on zinc metal. The liquor is then raised to about pH 4.0 or greater and flushed with oxygen to precipitate iron. Lastly, the purified electrolyte is subjected to zinc electrowinning wherein acceptably pure zinc cathode is produced and sulfuric acid is regenerated.
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patent: 3826648 (1974-07-01), Bodson
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Kennecott Copper Corporation
Lorusso Anthony M.
Ozaki G.
Sniado John L.
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