Abstract
Uranium and neptunium metals were successfully produced by the thermal decomposition of electrochemically prepared amalgams from the aqueous solutions. The amalgamation rate of uranium was approximately regarded as a first-order chemical reaction and the amalgam was heated at 1250°C in vacuum. The purity of uranium metals were estimated to be about 4 N by gaseous and metallic impurity analysis. The decomposition temperature of neptunium amalgams was decided by the analysis of mercury in the lanthanum and cerium metals prepared by the above method. The neptunium amalgams were synthesized from acetate buffer solutions and bright metallic buttons of neptunium metals were obtained. As a result of this study, the proposed method is shown to be much easier and simpler than conventional ones.
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