Continuous recovery of copper metal from acidic solutions

Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium

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Other Related Categories

75 05A, 75117, 252188, C22B 1512

Type

Patent

Status

active

Patent number

040959759

Description

ABSTRACT:
A process for winning copper from acidic aqueous solutions which employs hydrogen to drive the reaction. The copper bearing liquor is treated with an organic phase comprising a quinolic reductant and a nitrile solubilized in a water immiscible solvent. Components of the two phases react to produce a nitrile ligand stabilized cuprous solution and an organic solution containing oxidized quinolic compound. After separation, the organic phase containing the spent quinolic is regenerated by hydrogenation. The cuprous ion solution is flash distilled to drive off the nitrile and to produce equimolar quantities of copper metal and cupric ions by disproportionation. The nitrile may be reabsorbed into the organic phase for reuse.

REFERENCES:
patent: 2720532 (1955-10-01), Umhoefer
patent: 3820979 (0000-01-01), Manassen
patent: 4032331 (1977-06-01), Gerlach
patent: 4032332 (1977-06-01), Gerlach
patent: 4033765 (1977-07-01), Gerlach
patent: 4038070 (1977-07-01), Rappas et al.

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