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Solvent extraction experiments were conducted to separate iron and nickel from a spent FeCl 3 etching solution. Alamine336, MIBK and PC88A were tested as extractants and the highest extraction percentage of iron was obtained with Alamine336. It was possible to separate iron and nickel by extracting the spent etching solution with Alamine336. In the operation of mixer-settler, seven extraction...
In order to recover valuable metals and regenerate the etching solution from the spent nitric etching solutions of printed circuit board (PCB), solvent extraction, stripping, electrowinning, precipitation and cementation experiments have been performed. Nitric acid was selectively extracted by TBP from the spent etching solution and pure nitric acid solution was stripped by distilled water. After...
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