Di(2-ethyl hexyl) butyramide and di(2-ethyl hexyl)isobutyramide as extractants for uranium(VI) and plutonium(IV)
Di(2-ethyl hexyl) butyramide and di(2-ethyl hexyl)isobutyramide as extractants for uranium(VI) and plutonium(IV)
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二(2-乙基己基)丁酰胺和二(2-乙基己基)异丁酰胺作为铀(VI)和钚(IV)的萃取剂
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发表时间：
1997
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通讯作者：
G. Nair
中科院分区：
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作者：
D. R. Prabhu;G. R. Mahajan;G. Nair
研究了二(2-乙基己基)丁酰胺(DEHBA)和二(2-乙基己基)异丁酰胺(DEHBA)两种异构体支链烷基酰胺从硝酸中萃取铀(VI)和钚(IV)到正十二烷的反应。在较高酸度下，Pu(IV)的萃取率高于DEHBA对U(VI)的萃取率。然而，对于Dehiba，Pu(IV)的值可以忽略不计。PU(IV)被DEHBA提取为三酸，被Dehiba溶解。U(VI)均被这两个酰胺类化合物萃取。对不同温度下的萃取反应的研究表明，本研究中的所有反应均为焓有利、熵不利的反应。从块状铀(VI)中分离Pu(IV)是可行的。然而，在间歇提取研究中，分离出的钚的纯度并不令人满意。
The extraction of uranium(VI) and plutonium(IV) from nitric acid into n-dodecane was studied using two isomeric branched alkyl amides, di(2-ethyl hexyl) butyramide (DEHBA) and di(2-ethyl hexyl) isobutyramide (DEHIBA). The extraction ratios of Pu(IV) at relatively high acidities were higher than the corresponding values for U(VI) in the case of DEHBA. However, with DEHIBA the values for Pu(IV) were negligibly small. Pu(IV) was found to be extracted as trisolvate by DEHBA and as disolvate by DEHIBA. U(VI) was extracted by both the amides. From the study of the extraction reactions at different temperatures, it was shown that all the reactions in the present investigation were enthalpy favoured and entropy disfavoured. Separation of Pu(IV) from bulk of U(VI) was feasible. However, the purity of the separated plutonium was not satisfactory in batch extraction studies.