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Separation Science and Technology Volume 43, 2008 - Issue 9-10
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Original Articles

Extraction of Lanthanides with Diamides of Dipicolinic Acid from Nitric Acid Solutions. I

A. Paulenova Oregon State University, Corvallis, OR, USACorrespondence[email protected]
,
M. Yu. Alyapyshev Oregon State University, Corvallis, OR, USA; Khlopin Radium Institute, St-Petersburg, Russia
,
V. A. Babain Khlopin Radium Institute, St-Petersburg, Russia
,
R. S. Herbst Idaho National Laboratory, Idaho Falls, ID, USA
&
J. D. Law Idaho National Laboratory, Idaho Falls, ID, USA
Pages 2606-2618 | Received 15 Nov 2007, Accepted 15 Feb 2008, Published online: 06 Aug 2008
 
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Abstract

Three ortho-, meta-, and para-derivates of ethyl(tolyl)diamides of dipicolinic acid were synthesized and tested on their extraction performance from nitric acids solutions. Extraction of americium and lanthanides (Ln) by these compounds as a function of nitric acid concentration was studied. Distribution ratios of studied metals were determined using ICP-OES method and radiotracer 241Am. Am/Ln separation differs among studied diamides, and the best separation was found for N,N′-diethyl-N,N′-di(ortho)tolyl-diamide.

Notes

∗Am/Eu separation factor from pure 1 M nitric acid was 6.

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