Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group ib metal
Patent
1978-01-16
1979-04-24
Hearn, Brian
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group ib metal
423 40, 423 53, 423 54, 423127, 423132, 423139, 423150, C01G 310, C01G 3714, C01G 906, C01G 5310
Patent
active
041512570
ABSTRACT:
A method for recovering nonferrous metal values from hydroxide sludge wastes containing same by first chlorinating the aqueous waste to oxidize the chromium therein, separating the insoluble components therefrom and treating the resulting Cr(VI) solution in a fixed bed anion exchanger to separate the Cr(VI) from the solution, separating the copper from the aqueous solution by liquid-liquid extraction, separating the zinc from the copper-free solution by liquid-liquid extraction, precipitating and separating the aluminum in the form of hydroxide from the zinc-free solution and then separating the nickel from the aluminum-free solution by liquid-liquid extraction, and recovering the nonferrous metals from the respective solutions and precipitates by conventional procedures.
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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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