ULTRASONICALLY ENHANCED PROCESS FOR EXTRACTION OF METAL SPECIES IN SUPERCRITICAL FLUID

摘要

PPROBLEM TO BE SOLVED: To efficiently dissolve or extract metals, such as uranium, platinum and palladium, metalloids or their oxides while reducing environmental load. PSOLUTION: 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. PCOPYRIGHT: (C)2004,JPO