Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1984-07-26
1985-12-31
Rosenberg, Peter D.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 72, 75117, C22B 1500
Patent
active
045618879
ABSTRACT:
Solvent extraction is used for selective recovery of a dissolved metal such as copper from an aqueous solution of metals by means of an organic liquid, immiscible with the aqueous solution and selective for the metal of interest. The metal is extracted from the organic liquid by means of another aqueous stripping solution. The metal values are sufficiently concentrated in the aqueous stripping solution to get continuous precipitation of a metal salt in a substantially pure form. The metal salt is separated, rinsed, and dried to form an intermediate product. Preferably, the metal salt is a sulfate which is then dehydrated and thermally decomposed to form metal oxide and sulfur dioxide. The metal oxide may be also considered as an intermediate product. It is also desirable to pyrometallurgically reduce the metal oxide until pure metal powder is obtained, or it may be cast into ingots.
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patent: 4214901 (1980-07-01), Michal
patent: 4278642 (1981-07-01), MacInnis
Flett, "Solvent Extraction in Copper Hydrometallurgy: A Review" Transactions Mineral Processing & Extractive Metallurgy, Sec. C, Mar. 1974, pp. C30-36.
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"Purification of Manganese Solutions Containing Copper and Zinc by Liquid-Liquid Extraction, Using Di-(2-Ethylhexyl) Phosphoric Acid" by G. M. Ritcey and B. H. Lucas, Canadian Metallurgical Quarterly, vol. 10, No. 3, (1971).
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Pp. 498 and 499 of "Introduction to Metallurgy" by Joseph Newton, John Wiley & Sons, Inc., New York, (1947).
"Copper Sulfate Via Solvent Extraction and Crystallization" by Henry R. Moyer, III, presented at AIME Annual Meeting in New Orleans, Louisiana, Feb. 18 to 22, 1979.
Domic Esteban M.
Hein Hans C.
Rosenberg Peter D.
Sociedad Minera Pudahuel Ltda., C.P.A.
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