Ivanova S. Physical and technological mechanisms of improving of the uranium extraction efficiency by supercritical carbon dioxide

Object: processes of extraction complex uranium in supercritical carbon dioxide. Objective: determination the physical and technological mechanisms of raising effectiveness of extraction complexes of uranium in supercritical carbon dioxide from granite, which are modeled materials of atomic energy. Methods: a laboratory setting SFE - U intended to highlight complexes of uranium in supercritical carbon dioxide; x-ray fluorescent analyzer CRAB - 3УМ, SF - 2000 spectrophotometer; optical microscope MBS - 9; laser diffractometry; high-pressure cell with sapphire windows; capillary temperature-controlled restrictor; mathematical modeling of two-level and double two-level systems solubility of water and complex uranium in supercritical carbon dioxide respectively. Results: for the first time it was determined that the water which increases the availability of complexes of uranium extraction efficiency, supercritical carbon dioxide exists in the form of microdroplets of a size of about 55 mkm; for the first time theoretically and experimentally it was shown that the efficiency of uranium extraction complex by supercritical carbon dioxide up to 96%; for the first time it was determined that nanoscale molecule complex of uranium at the experimental conditions extracted into microdroplets of water as a result of the acquisition by them of hydrophilic properties. Use area: solid state physics