Distribution Behavior of Neptunium and Plutonium between Acid Solutions and Some Organic Extractants

Autor:	Boyd Weaver, D. E. Horner
Rok vydání:	1960
Předmět:	Phosphine oxide General Chemical Engineering Neptunium Inorganic chemistry chemistry.chemical_element Sulfuric acid Hydrochloric acid General Chemistry Phosphate chemistry.chemical_compound chemistry Nitric acid Phosphoric acid Phosphine Nuclear chemistry
Zdroj:	Journal of Chemical & Engineering Data. 5:260-265
ISSN:	1520-5134 0021-9568
Popis:	The extractive properties of some organonitrogen and organophosphorus compounds for neptunium and plutoniuin in aqueous acid solutions were investigated under the following conditions: (1) The acid was generally HNO/sub 3/ although H/sub 2/SO/sub 4/ and HCl were also studied. (2) The valence of . neptunium and plutonium was generally (IV) although Np(V) and (VI) and Pu(lIl) and (VI) were briefly studied. (3) The extractants were (a) salts of primary. secondary. and tertiary amines and qunternary aminonium salts and (b) dialkyl phosphoric acids, neutral phosphates, and phosphine oxides. The results show extraction maxima for the (IV) state at 2 N HNO/sub 3/ by tertiary amines and at 8 N HNO/sub 3/ by the other amines. Increasing the nitrate ion concentration . ai constant acidity increases extractability by amines, and extractions of the (IV) state are greater from HNO/sub 3/ than from H/sub 2/SO/sub 4/ except for primary amines. Extraction of the (IV) state by organophosphorus extractants from HNO/sub 3/ varies in the order dialkyl phosphoric acid) phosphine oxide>> neutral phosphate. The use of the results to derive methods for separating neptunium and plutonium from solutions and from each other is discussed. (D.L.C.)
Databáze:	OpenAIRE
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