Kinetics of Reactive Extraction of Nd from Nd2O3 with TBP-HNO3 Complex in Supercritical Carbon Dioxide

朱礼洋; 段五华; 徐景明; 朱永

doi:10.1016/S1004-9541(08)60196-2

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Kinetics of Reactive Extraction of Nd from Nd₂O₃ with TBP-HNO₃ Complex in Supercritical Carbon Dioxide

Updated：2026-01-06

- Kinetics of Reactive Extraction of Nd from Nd₂O₃ with TBP-HNO₃ Complex in Supercritical Carbon Dioxide
- Chinese Journal of Chemical Engineering Vol. 17, Issue 2, Pages: 214-218(2009)
- Affiliations：
  
  Institute of Nuclear and New Energy Technology, Tsinghua University,Beijing,China,102201
- Author bio：
- Funds：
- DOI：10.1016/S1004-9541(08)60196-2
  CLC：
- Published：2009
- Accepted：
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DOI：

O DOI： 10.1016/S1004-9541(08)60196-2.

摘要

Abstract

The process based on supercritical fluid extraction for reprocessing of the spent nuclear fuel has some remarkable advantages over the plutonium-uranium extraction(PUREX) process.Especially

it can minimize the generation of secondary waste.Dynamic reactive extraction of neodymium oxide(Nd

) in supercritical carbon dioxide(SC-CO

) containing tri-n-butyl phosphate-nitric acid(TBP-HNO

) complex was investigated.Temperature showed a positive effect on the extraction efficiency

while pressure showed a negative effect when the unsaturated TBP-HNO

complex was employed for the dynamic reactive extraction of Nd

in SC-CO

.Both temperature and pressure effects indicated that the kinetic process of the reactive extraction was controlled by the chemical reaction.A kinetic model was proposed to describe the extraction process.

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