| 摘要 |
<p>PURPOSE: To liberate and recover selected ions by bringing a compd., which is selected from a group expressed by specific formulas into contact, with a multi-ionic soln., forming a complex with the selected ions and separating and decomposing this complex. CONSTITUTION: A compd. expressed by formula I, formular II or formular III is brought to react with a silica gel to synthesize a silica gel having crown ether chains. The obtd. combined silica gel is filled into a column. A material contg. a mixture of metallic ions is flowed into this column. Then, this silica gel forms the complex with the desired metallic ions, and thus, is separated from other metallic ions. The metallic ions other than the desired metallic ions flow out of the column. Next, an eluant is flowed into the column, decomposing the complex and dissolving the desired metallic ions, which are separated and recovered from the column to the outside.</p> |
