| 摘要 |
A manufacturing method of ultrahigh purity copper is provided wherein, upon subjecting copper to high purification with the electrolytic method, an anode and a cathode are partitioned with an anion exchange membrane, anolyte is intermittently or continuously extracted and introduced into an active carbon treatment vessel, a chlorine-containing material is added to the active carbon treatment vessel so as to precipitate impurities as chloride, active carbon is subsequently poured in and agitated so as to adsorb the precipitated impurities, the adsorbed impurities are removed by filtration, and the obtained high purity copper electrolytic solution is intermittently or continuously introduced into the cathode side and electrolyzed. This technology enables the efficient manufacture of ultrahigh purity copper having a purity of 8N (99.999999 wt %) or higher from a copper raw material containing large amounts of impurities. |
