Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1978-07-11
1979-05-08
Hearn, Brian
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
75109, 75117, 75118R, 423 24, 423112, 423127, 423277, C01G 734, C22B 1512, C22B 1104
Patent
active
041534522
ABSTRACT:
Metals are recovered from waste materials that contain an organic component and a bimetallic salt complex component that comprises complexes having the formula M.sub.I M.sub.II X.sub.n.Aromatic and/or the formula M.sub.I M.sub.II X.sub.n.M.sub.II OX.Aromatic, wherein M.sub.I is a Group I-B metal, M.sub.II is a Group III-A metal, X is halogen, n is the sum of the valences of M.sub.I and M.sub.II, and Aromatic is a monocyclic aromatic hydrocarbon or halogenated aromatic hydrocarbon having 6 to 12 carbon atoms, by hydrolyzing the waste material with dilute hydrochloric acid to form a hydrolysis mixture that separates into an organic phase and an aqueous phase, and, after removing the organic phase, adding to the aqueous phase sufficient aluminum or another reducing metal to precipitate the Group I-B metal. After the precipitated metal has been removed from it, the aqueous solution is treated with sufficient base to precipitate the Group III-A metal hydroxyide, which is recovered from the aqueous solution. This process can be used, for example, to recover copper and aluminum from waste materials that contain CuAlCl.sub.4.toluene and/or CuAlCl.sub.4.AlOCl.toluene.
REFERENCES:
patent: 3477813 (1969-11-01), Fernald et al.
patent: 3678112 (1972-07-01), Wollensak et al.
patent: 3758606 (1973-09-01), Horowitz et al.
patent: 3960910 (1976-06-01), Sudduth et al.
Keyworth Donald A.
Sudduth Jerome R.
Berlow Evelyn
Hearn Brian
Tenneco Chemicals Inc.
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