2002•Nonferrous MetalsRequires access
SEPARATION OF Cu, Ni AND Co FROM AMMONIA SOLUTION BY SOLVENT EXTRACTION
Chengyan Wang
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Abstract
Copper, nickel and cobalt are separated from ammonia solution by PT5050 solvent extraction The extraction rates of Cu 2+ and Ni 2+ reach to 99 5%, and Co 3+ is in the raffinate The stripping rate of Ni 2+ reaches to 99% by selectivity stripping, and Cu 2+ content in the Ni 2+ stripping liquor is 0 001g/L, It applys to produce cathode nickel Copper is stripped by high concentration solution (180 g/L H 2SO 4), and producing cathode copper or copper sulfate Cobalt in raffinate is cemented by Na 2S, the grade of cobalt in precipitate is higher than 40%, and the recovery is higher than 96%