| 摘要 |
<p>1430542 Separating fission products UNITED STATES ENERGY RESEARCH & DEVELOPMENT ADMINISTRATION 20 May 1974 [12 July 1973] 22370/74 Heading G6R Palladium, technetium, rhodium and ruthenium are separated from an aqueous solution, e.g. a waste fission product-containing nitric acid solution from nuclear fuel reprocessing, by contacting the solution in sequence with three beds of carbon, the first carrying a chelating agent specific for Pd, the second a chelating agent specific for Tc, and the third a chelating agent specific for Rh and Ru. The chelating agent for Pd may be dimethyl glyoxime, for Tc acetylacetone, diacetyltoluene- 3,4-dithiol, or diacetyl dithiol, and for Rh and Ru phenyl thiourea, 8-mercaptoquinoline, or 8-hydroxyquinoline. The metal values may be recovered by calcining the carbon beds and leaching the resulting ash. The carbon beds may be prepared by dissolving the chelating agent in ethyl alcohol, mixing with the carbon, and evaporating the alcohol.</p> |
