Separation and recovery of copper metal from ammoniacal solution

Details Separation and recovery of copper metal from ammoniacal solution Separation and recovery of copper metal from ammoniacal solution

1976-06-14

1977-09-13

Ozaki, G.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75 5A, 75117, 204106, 204108, 423 42, C22B 1512

Patent

active

040479404

ABSTRACT:
Copper is recovered from solutions containing cupric ammoniacal complexes by reducing copper in the complexes to the cuprous state and thereafter precipitating the copper as cuprous acetylide by passing acetylene through the solution. After the cuprous acetylide is separated from the solution and washed thoroughly, it is reacted with acetonitrile and an acid to form acetylene and a cuprous-acetonitrile complex: Cu(CH.sub.3 CN).sub.2.sup.+. The solution containing this complex is then flash distilled to remove the acetonitrile and to disproportionate unstable cuprous ions into copper metal and cupric ions. Following the disproportionation, the components are separated and copper metal is collected. SU

REFERENCES:
patent: 2440612 (1948-04-01), Lichtenwalter
patent: 3844763 (1974-10-01), Burkin
patent: 3865580 (1975-02-01), Hummel et al.
patent: 3865744 (1975-02-01), Parker et al.
patent: 3883351 (1974-09-01), Neskora et al.
patent: 3937657 (1976-02-01), Parker et al.
patent: 3961028 (1976-06-01), Parker et al.
patent: 3966890 (1976-06-01), Parker et al.
patent: 3983017 (1976-09-01), Szabo

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