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Kinetic of liquid-liquid extraction for uranyl nitrate and actinides (III) and lanthanides (III) nitrates by amide extractants; Cinetique d`extraction liquide-liquide du nitrate d`uranyle et des nitrates d`actinides (III) et de lanthanides (III) par des extractants a fonction amide

Abstract

The kinetics of liquid-liquid extraction by amide extractants have been investigated for uranyl nitrate (monoamide extractants), actinides (III) and lanthanides (III) nitrates (diamide extractants). The transfer of the metallic species from the aqueous phase to the organic phase was studied using two experimental devices: ARMOLLEX (Argonne Modified Lewis cell for Liquid Liquid Extraction) and RSC (Rotating Stabilized Cell). The main conclusions are: for the extraction of uranyl nitrate by DEHDMBA monoamide, the rate-controlling step is the complexation of the species at the interface of the two liquids. Thus, an absorption-desorption (according to Langmuir theory) reaction mechanism was proposed; for the extraction of actinides (III) and lanthanides (III) nitrates in nitric acid media by DMDBTDMA diamide, the kinetic is also limited by interfacial reactions. The behavior of Americium and Europium is very similar as fare as their reaction kinetics are concerned. (author). 89 refs.
Authors:
Toulemonde, V [1] 
  1. CEA Centre d`Etudes Nucleaires de Saclay, 91 -Gif-sur-Yvette (France)
Publication Date:
Dec 20, 1995
Product Type:
Technical Report
Report Number:
CEA-R-5746
Reference Number:
SCA: 050800; 400105; PA: AIX-29:016270; EDB-98:058287; SN: 98001946995
Resource Relation:
Other Information: DN: 89 refs.; PBD: 20 Dec 1995
Subject:
05 NUCLEAR FUELS; 40 CHEMISTRY; ACTINIDES; AMIDES; CHEMICAL REACTION KINETICS; ENTRAINMENT; NITRIC ACID; RARE EARTHS; REPROCESSING; SOLVENT EXTRACTION; SPENT FUELS
OSTI ID:
606907
Research Organizations:
CEA Centre d`Etudes Nucleaires de Saclay, 91 - Gif-sur-Yvette (France).
Country of Origin:
France
Language:
French
Other Identifying Numbers:
Other: ON: DE98617515; TRN: FR9704592016270
Availability:
INIS; OSTI as DE98617515
Submitting Site:
FRN
Size:
189 p.
Announcement Date:

Citation Formats

Toulemonde, V. Kinetic of liquid-liquid extraction for uranyl nitrate and actinides (III) and lanthanides (III) nitrates by amide extractants; Cinetique d`extraction liquide-liquide du nitrate d`uranyle et des nitrates d`actinides (III) et de lanthanides (III) par des extractants a fonction amide. France: N. p., 1995. Web.
Toulemonde, V. Kinetic of liquid-liquid extraction for uranyl nitrate and actinides (III) and lanthanides (III) nitrates by amide extractants; Cinetique d`extraction liquide-liquide du nitrate d`uranyle et des nitrates d`actinides (III) et de lanthanides (III) par des extractants a fonction amide. France.
Toulemonde, V. 1995. "Kinetic of liquid-liquid extraction for uranyl nitrate and actinides (III) and lanthanides (III) nitrates by amide extractants; Cinetique d`extraction liquide-liquide du nitrate d`uranyle et des nitrates d`actinides (III) et de lanthanides (III) par des extractants a fonction amide." France.
@misc{etde_606907,
title = {Kinetic of liquid-liquid extraction for uranyl nitrate and actinides (III) and lanthanides (III) nitrates by amide extractants; Cinetique d`extraction liquide-liquide du nitrate d`uranyle et des nitrates d`actinides (III) et de lanthanides (III) par des extractants a fonction amide}
author = {Toulemonde, V}
abstractNote = {The kinetics of liquid-liquid extraction by amide extractants have been investigated for uranyl nitrate (monoamide extractants), actinides (III) and lanthanides (III) nitrates (diamide extractants). The transfer of the metallic species from the aqueous phase to the organic phase was studied using two experimental devices: ARMOLLEX (Argonne Modified Lewis cell for Liquid Liquid Extraction) and RSC (Rotating Stabilized Cell). The main conclusions are: for the extraction of uranyl nitrate by DEHDMBA monoamide, the rate-controlling step is the complexation of the species at the interface of the two liquids. Thus, an absorption-desorption (according to Langmuir theory) reaction mechanism was proposed; for the extraction of actinides (III) and lanthanides (III) nitrates in nitric acid media by DMDBTDMA diamide, the kinetic is also limited by interfacial reactions. The behavior of Americium and Europium is very similar as fare as their reaction kinetics are concerned. (author). 89 refs.}
place = {France}
year = {1995}
month = {Dec}
}