| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide the method and apparatus for electrolytically refining copper by suppressing the deposition of the metals other than copper in the electrolytic copper refining and electrodepositing only high-purity copper. SOLUTION: Copper is dissolved in an aq. hydrochloric acid soln. in an oxidizing atmosphere, the precipitate is filtered off, the soln. is sent to an anode compartment of the two-compartment electrolytic cell with a cation-exchange membrane as the diaphragm, the copper ion is electrolytically sent to the cathode compartment and electrolytically reduced by the cathode through which an oxygen-contg. gas is passed to deposit copper on the cathode, and high-purity copper is produced. This high-purity copper producing apparatus is provided with a means for dissolving copper in hydrochloric acid and adjusting the concn., a means for filtering the filtered copper chloride soln., a means for introducing the filtered soln. into an electrolytic cell divided by a cation-exchange membrane into an anode compartment and a cathode compartment and a means for supplying gaseous oxygen on the cathode surface, and electrolytic copper is formed on the cathode surface. A microfilter is preferably used for the filtration.</p> |
