Heavy metal separation from copper-bearing wastes

Details Heavy metal separation from copper-bearing wastes Heavy metal separation from copper-bearing wastes

1983-12-29

1984-12-18

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

75101R, 75120, C25C 116

Patent

active

044889500

ABSTRACT:
Copper-bearing waste, e.g. brass works flue dust (71% Zn, 31/2% Pb, 14% Cu) was mixed with dendritic zinc, and 80 g of the mixture was leached in 1 liter of 10M hot NaOH for 20 minutes. Dissolution of the copper was successfully held down to under 1%, while all the lead and most of the zinc were dissolved. The dendritic zinc was added as 2 parts by mass per 98 parts of the dust, and had a surface area of 5-10 m.sup.2 /g; it was made by electrolysing a zincate solution.

REFERENCES:
patent: 2124421 (1938-07-01), Klein
patent: 2655472 (1953-10-01), Hilliard et al.
patent: 3743501 (1973-07-01), Cusanelli et al.

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