| 摘要 |
An electrolytic oxidation process for producing alkali metal permanganate from alkali metal manganate, and particularly for effecting such production to regenerate a permanganate working bath, such as used in desmearing, etch-back or cleaning processes in the manufacture of printed circuits, which has reached a level of decreased working efficiency, wherein an aqueous alkaline solution of manganate in alkali metal hydroxide is electrolytically oxidized using a non-sacrificial anode and a cathode comprised of an alkali-resistant cathode electrode immersed in a concentrated aqueous solution of sodium hydroxide in a container porous to ions which is formed from ion-porous polymeric membrane material.
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