Process for the recovery of cuprous chloride in the presence of

Details Process for the recovery of cuprous chloride in the presence of Process for the recovery of cuprous chloride in the presence of

1975-02-24

1977-03-22

Tayman, Jr., James H.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75108, 75117, 423 34, 423493, 423 42, 4236585, 23300, C22B 300, C01G 304

Patent

active

040134571

ABSTRACT:
A process is disclosed for separating cuprous chloride from a solution comprising cuprous chloride and one or more of a number of metal impurities, the process comprising crystallizing the cuprous chloride from the solution in the presence of copper as cupric chloride in a concentration of at least about 20 grams per liter. In one embodiment, the process is employed for recovering substantially pure copper from copper sulfide concentrates containing one or more metal impurities, the basic process comprising leaching the copper sulfide concentrates with ferric chloride to produce a leach solution comprising cuprous chloride, cupric chloride, ferrous chloride and the metal impurities, crystallizing a substantial portion of the cuprous chloride from the leach solution in the presence of cupric ion in a concentration of at least about 20 grams per liter in order to produce substantially pure cuprous chloride and a mother liquor, separating the crystallized cuprous chloride from the mother liquor, reducing the crystallized cuprous chloride to substantially pure elemental copper, treating a substantial portion of the mother liquor with oxygen and hydrochloric acid to produce iron oxide, cupric chloride and ferric chloride, and treating the remainder of the mother liquor in order to remove the impurities.

REFERENCES:
patent: 2586579 (1952-02-01), Supiro
patent: 3785944 (1974-01-01), Atwood et al.
patent: 3798026 (1974-03-01), Milner et al.
patent: 3865744 (1975-02-01), Parker et al.
patent: 3879272 (1975-04-01), Atwood et al.

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