| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To efficiently dissolve or extract metals, such as uranium, platinum and palladium, metalloids or their oxides while reducing environmental load. <P>SOLUTION: The metals, metalloids or their oxides are dissolved or extracted by using a supercritical fluid, such as carbon dioxide, containing a chelating reagent such as alkyl phosphate and a Lewis acid such as mineral acid and applying ultrasonic vibrations at about 300 to 350 K under about 10 to 25 MPa pressure. <P>COPYRIGHT: (C)2004,JPO</p> |
