Lead removal method

Details Lead removal method Lead removal method

1983-12-20

1987-11-03

Stoll, Robert L.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group iva metal

423 55, 423 98, 75 2, 75101R, 75108, 75120, C01G 2100

Patent

active

047042605

ABSTRACT:
A method is provided for the removal of lead contaminants from ores and mineral concentrates, comprising leaching the concentrates, at elevated temperatures, with an aqueous solution containing an aminopolycarboxylic acid. After separating the solution from the concentrates, lead can be precipitated by treating the solution with a sulfide; the solution can be recycled for use as a leachant.

REFERENCES:
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patent: 3634070 (1972-01-01), Lindstrom et al.
patent: 4124408 (1978-11-01), Eaton et al.
Bailor, C. J., Jr. et al., Comprehensive Inorganic Chemistry, Pergamon Press, Great Britain, 1973, vol. III, pp. 700-710, 719-723, & 736-739.
Dwyer, F. P. et al, Chelating Agents and Metal Chelates, Academic Press, New York, 1964, pp. 304-305.
Chemical Abstracts 85: 127643X (1976).
L. L. Duda and A. Bartecki, "Dissolution of Cu.sub.2 S in Aqueous EDTA Solutions Containing Oxygen" in Hydrometallrugy, vol. 8, pp. 341-354 (1982).
A. Nixon, D. Keller and A. Corsini, "The Recovery of Radium and EDTA from Radium Leach Solutions" in Hydrometallurgy, vol. 11, pp. 33-45 (1983).

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