Extraction and separation of copper and other metals from...

Details Extraction and separation of copper and other metals from... Extraction and separation of copper and other metals from...

C - Chemistry, Metallurgy

22

B

53/375

C22B 3/00 (2006.01) C22B 3/30 (2006.01) C22B 3/32 (2006.01) C22B 3/36 (2006.01)

Patent

CA 1062474

TITLE EXTRACTION AND SEPARATION OF COPPER AND OTHER METALS FROM AMMONIACAL SOLUTION INVENTORS Gordon M. Ritcey Bernard H. Lucas ABSTRACT OF THE DISCLOSURE Aqueous ammoniacal solutions of copper and other metals selected from zinc, cobalt and nickel are solvent extracted at an equilibrium pH of about 7 to 9 to sequentially separate copper followed by the other metals. The extraction reagent is a hydrocarbyl-substi- tuted 8-hydroxyquinoline. The loaded solvent is acid- stripped to recover the metal and recycled. The order of extraction is Cu > Zn > Co > Ni, except zinc and cobalt can be interchanged by altering process variables. The process has particular application to alkaline pressure leach solutions of ores, concentrates or tailings, or deep-sea manganese nodules.

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