| 摘要 |
<p>1415450 Recovery of plutonium COMMISSARIAT A L'ENERGIE ATOMIQUE 17 Dec 1973 [28 Dec 1972] 58389/73 Heading G6R Plutonium is stripped from an organic solvent by contacting the solvent in countercurrent with a solution containing an aromatic organic reducing agent which is a substituted hydrazine, a polyamine, or an aminophenol, together with an agent for the removal of nitrites, for example hydrazine, phenylhydrazine, or sulphamic acid. Phenylhydrazine may act both as the reducing agent and the agent for removing nitrites. The reducing agent reduces plutonium from the Pu (IV) to the Pu (III) state. The process may be used for the separation of plutonium and uranium; after removal of plutonium, uranium may be separated, and the solvent then regenerated by countercurrent contact with an alkaline solution. In Examples 1-5, plutonium is stripped from a solution of tributyl phosphate in dodecane by means of nitric acid solutions of phenylhydrazine and hydrazine, phenylhydrazine alone, paraphenylene diamine and hydrazine, para-aminophenol and hydrazine, and diamino-2,4-phenol and hydrazine. In Example 6, plutonium is stripped from trilaurylamine in dodecane using a nitric acid solution of phenylhydrazine and hydrazine.</p> |
