Modified synthesis scheme for N,N´-dimethyl-N,N´-dioctyl-2,(2´-hexyloxyethyl) malonamide (DMDOHEMA) and its comparison with proposed solvents for actinide partitioning
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Ajay B. Patil
Abstract
N,N´-dimethyl-N,N´-dioctyl-2,(2´-hexyloxyethyl) malonamide (DMDOHEMA) has been synthesized by a relatively simpler route with a better yield than the conventional procedures for the synthesis of pentaalkyl substituted diamides. The proposed route replaces the use of acid chlorides and brominating agents (corrosive in nature) by acid diester and p-toluene sulphonyl (tosyl) chloride, respectively. The later easily replaces hydrogen from primary OH group of the 3-oxanonyl side chain and relatively less corrosive. The synthesized product has been tested for the extraction behavior of 241Am, Np, Pu as pure tracers as well as under Pressurized Heavy Water Reactor (PHWR) Simulated High-Level Waste (SHLW) conditions. The stoichiometries of extracted species of Np(IV), Pu(IV), and Am(III) from 3 M HNO3 using varying concentrations of DMDOHEMA in n-dodecane has been determined. The effect of the nature of mineral acid (viz. HCl, HNO3, and HClO4) on the extraction of Am(III) has also been investigated employing DMDOHEMA and N,N´-dimethyl-N,N´-dibutyl-tetradecyl malonamide (DMDBTDMA) as extractants and explained in terms of the aggregation behavior of diamides. The performance of DMDOHEMA has been evaluated vis-à-vis other proposed extractants for actinide partitioning under PHWR-SHLW conditions.
© by Oldenbourg Wissenschaftsverlag, München, Germany
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Articles in the same Issue
- Cross section measurements and theoretical calculations of proton induced nuclear reactions on natural tellurium
- Speciation of Am(III)/Eu(III) sorbed on γ-alumina: effect of metal ion concentration
- Correlation of retention of lanthanide and actinide complexes with stability constants and their speciation
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- Synthesis, characterization and stability properties of Cl-bearing hydrotalcite-pyroaurite solids
- Interactions of Tc(IV) with citrate in NaCl media
- Complexation of rhenium with ethylenediaminetetraacetic acid: studies of technetium analogue using Raman spectroscopy
- Thymidine kinase enzyme selective imaging radiopharmaceutical: 99mTc(CO)3-Ganciclovir
- A study of the surface erosion of zircaloy material during laser ablation process by thin layer activation technique
