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The separation of copper from nickel has been a difficult procedure, and has been the subject of investigation for many years. Electrochemical methods, using aqueous solutions, were investigated by the present authors and the effects of pH and other factors studied. It was found that high acidity, low current density, high temperature and vigorous circulation favored the deposition and removal of copper. A rapid method for the removal of copper from nickel solutions is given.
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Fink et al. (1930) studied this question.
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