| 摘要 |
<P>PROBLEM TO BE SOLVED: To increase the concentration of cadmium by a simple method, and to easily and stably obtain crude cadmium having a relatively high purity (Cd>90%) even if some impurities are present. <P>SOLUTION: The method for producing crude cadmium is characterized in that an alkali agent is added to a cadmium aqueous solution, the obtained cadmium hydroxide is dissolved into acid once again, alkali is added thereto, and copper removing treatment is performed at a pH of 5.5 to 7.0 to obtain an electrolytic solution having a high Cd concentration. <P>COPYRIGHT: (C)2012,JPO&INPIT |
