Laboratory simulation of nickel(II) and cobalt(II) ion separation in a continuous counter-current extractor
 
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Częstochowa University of Technology
2
Poznań University of Technology
CORRESPONDING AUTHOR
Mariusz Bogacki   

Poznań University of Technology, Institute of Chemical Technology and Engineering, Pl. M. Skłodowskiej-Curie 2, 60-965 Poznań, Poland
Publication date: 2006-01-01
 
Physicochem. Probl. Miner. Process. 2006;40(1):195–201
 
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ABSTRACT
In the paper studies were presented related to application of CYANEX 272 (di(2,4,4- trimethylpentyl)phosphine acid) extractant in the extractive separation of nickel(II) and cobalt(II) ions originating from a sulphate solution. Values of pH0.5 amounted to 4.6 and 5.7 for cobalt(II) and nickel(II) ions, respectively, which permitted selective separation of the ions. Simulation of the three- stage extraction process, performed in laboratory conditions, permitted to conclude that such a process allows for a selective separation of cobalt(II) and nickel(II) ions although it requires appropriate modification only when pH of the aqueous phase is controlled.
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