公开(公告)号：US4764352A

公开(公告)日：1988-08-16

申请号：US878131

申请日：1986-06-25

申请人： Andre Bathellier ,  Jean-Yves Pasquiou ,  Etienne Vialard

发明人： Andre Bathellier ,  Jean-Yves Pasquiou ,  Etienne Vialard

IPC分类号： C01G25/00 ,  C01G27/00 ,  C01G47/00 ,  C01G56/00 ,  C22B3/32 ,  C22B3/38 ,  C22B60/02 ,  G21C19/46 ,  B01D11/00 ,  G21C19/50 ,  G21F9/04

CPC分类号： G21C19/46 ,  C01G25/003 ,  C01G27/003 ,  C01G47/003 ,  C01G56/001 ,  C22B3/0024 ,  C22B3/0025 ,  C22B3/0052 ,  C22B3/0068 ,  C22B60/026 ,  Y02P10/234 ,  Y02W30/883

摘要： Process for preventing the extraction of technetium and/or rhenium, particularly during the extraction of uranium and/or plutonium by an organic solvent.This process permitting the extraction of a chemical element, such as uranium or plutonium present in an aqueous solution containing both said element, technetium and/or rhenium and zirconium and/or hafnium consists of contacting the aqueous solution with an organic solvent able to extract said element, wherein for preventing the extraction of the technetium and/or rhenium with said element, to the aqueous solution is added a zirconium and/or hafnium complexing agent in a quantity adequate for complexing all the zirconium and/or hafnium, said agent being soluble in the aqueous solution.

摘要翻译： 防止锝和/或铼提取的方法，特别是在通过有机溶剂萃取铀和/或钚时。 该方法允许提取存在于含有所述元素，锝和/或铼以及锆和/或铪的水溶液中的化学元素如铀或钚的化学元素包括使水溶液与能够提取所述元素， 元素，其中为了防止将所述元素的锝和/或铼与所述元素一起提取到所述水溶液中，加入足以使所有锆和/或铪络合的量的锆和/或铪络合剂，所述试剂是可溶的 在水溶液中。

公开(公告)号：US4983300A

公开(公告)日：1991-01-08

申请号：US285768

申请日：1988-12-16

申请人： Michel Germain ,  Bruno Gillet ,  Jean-Yves Pasquiou

发明人： Michel Germain ,  Bruno Gillet ,  Jean-Yves Pasquiou

IPC分类号： B01D11/04 ,  C01G56/00 ,  C22B60/04 ,  G21C19/46

CPC分类号： G21C19/46 ,  C01G56/001 ,  C22B60/04 ,  Y02W30/883

摘要： The invention relates to a process for the reextraction in aqueous solution of the plutonium present in an organic solvent, more particularly usable for uranium-plutonium separation.According to this process the organic solvent is contacted with an acid aqueous solution of uranous salt, e.g. uranous nitrate, and hydroxylamine salt, e.g. hydroxylamine nitrate. Under these conditions, the uranous nitrate acts as a reducing agent for plutonium at valency (III and the hydroxylamine nitrate, which is also a plutonium reducing, agent, stabilizes Pu(III) and U(IV) in aqueous phase.Performances comparable to those of the U(IV)-hydrazone nitrate system are obtained without forming prejudicial hydrazine nitrate decomposition products. (FIG. 2).

摘要翻译： 本发明涉及在存在于有机溶剂中的钚的水溶液中再提取的方法，更特别可用于铀 - 钚分离。 根据该方法，将有机溶剂与酸性尿素水溶液接触。 硝酸铀和羟胺盐，例如。 硝酸羟胺。 在这些条件下，硝酸铀作为钚的还原剂（III和硝酸羟胺，也是钚还原剂，在水相中稳定Pu（III）和U（IV），性能与那些相当 的铀（IV） - 腙硝酸盐体系，而不会形成有害的硝酸肼分解产物（图2）。