Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group ib metal
Patent
1978-09-26
1979-07-24
Hearn, Brian
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group ib metal
423 41, 423 55, 423 57, 423 61, 423100, 423109, 423127, 423128, 423139, 423150, C01G 310, C01G 3714, C01G 900, C01G 5310
Patent
active
041622944
ABSTRACT:
A method for treating nonferrous metal hydroxide sludge waste to separate and recover the nonferrous metals therein wherein the waste is first mixed with an alkali hydroxide or carbonate, dried, and then roasted and the water-insoluble residue in the roasted material is treated with sulfuric acid to produce an acid-insoluble residue and a sulfuric acid solution containing copper, aluminum and chromium and thereafter, separating the copper from this solution by liquid-liquid extraction and thereafter, separating the aluminium, chromium, zinc and nickel from the remaining solution by separate liquid-liquid extraction steps.
REFERENCES:
patent: 2775517 (1956-12-01), Mancke
patent: 3966569 (1976-06-01), Reinhardt et al.
patent: 4029733 (1977-06-01), Faugeras et al.
patent: 4105743 (1978-08-01), Reinhardt et al.
patent: 4124462 (1978-11-01), Reinhardt et al.
Reinhardt, H., "Solvent Extraction for Recovery of Metal Waste" Chemistry and Industry, Mar. 1, 1975, pp. 210-213.
Muller Wolfgang
Witzke Lothar
Hearn Brian
Th. Goldschmidt Ag
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