The Radiolytic and Thermal Stability of Diamides of Dipicolinic Acid

The thermal and radiolytical stabilities of three isomers of N,N′-diethyl-N,N′-ditolyl-dipicolinamide (EtTDPA) were investigated. Radiolysis was performed at doses up to 125 kGy and thermogravimetric analysis was performed at temperatures of up to 450°C. Infrared data showed increasing amounts of ar...

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Bibliographic Details
Published inSeparation science and technology Vol. 45; no. 12-13; pp. 1706 - 1710
Main Authors Lapka, J. L., Paulenova, A., Herbst, R. Scott, Law, J. D.
Format Journal Article
LanguageEnglish
Published Taylor & Francis Group 01.01.2010
Subjects
Americium
Correlation
diamides
dipicolinic acid
Europium
extraction
Infrared
Isomers
Nitric acid
Radiolysis
Separation
Stability
UNEX
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Summary:The thermal and radiolytical stabilities of three isomers of N,N′-diethyl-N,N′-ditolyl-dipicolinamide (EtTDPA) were investigated. Radiolysis was performed at doses up to 125 kGy and thermogravimetric analysis was performed at temperatures of up to 450°C. Infrared data showed increasing amounts of aromatic nitration by nitric acid correlating to larger doses. However, gamma ray doses of up to 125 kGy did not cause any significant effects in separation performance with the studied extraction mixtures containing americium or europium within the studied range. The highest separation factor between americium and europium was seen using the meta isomer with an average value of 4.1 across all doses applied in this work.
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ISSN:0149-6395
1520-5754
DOI:10.1080/01496395.2010.493830