This porous products based on cobalt or fluoride of lead fluoride and use for the purification of uranium hexafluoride of beads or elements composites based on cobalt fluoride

摘要

The invention relates to the preparation of the fluoride of cobalt cof or of lead fluoride pbf having a specific surface high. / p & & p & according to the invention, it is possible to obtain a powder of the fluoride of cobalt with a specific surface area of 10 has 120mg or a powder of lead fluoride having a specific surface area of 1a 4mg in decomposing fluosilicate thermally of the cobalt or lead fluorosilicate. The thermal decomposition can be completed after having impregnated of the balls - supports made of alumina of a solution of fluorosilicate of lead or cobalt, which makes it possible to obtain beads loaded of lead fluoride or of the fluoride of cobalt. / p & & p & the balls loaded of cobalt can be used as a reducing agent for the purification of hexafluoride of uranium containing traces of plutonium hexafluoride and or hexafluoride neptunium.