Journal
SOLVENT EXTRACTION AND ION EXCHANGE
Volume 27, Issue 2, Pages 97-106Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/07366290802672204
Keywords
Solvent extraction; partitioning; CyMe4-BTBP process; minor actinides; SANEX
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Funding
- European Commission [211267, FI6W-CT-2003-508854]
- Michael Hudson for the synthesis of the BTBP molecule
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Efficient recovery of minor actinides from a genuine spent fuel solution has been successfully demonstrated by the CyMe4-BTBP/DMDOHEMA extractant mixture dissolved in octanol. The continuous countercurrent process, in which actinides(III) were separated from lanthanides(III), was carried out in laboratory centrifugal contactors using an optimized flow-sheet involving a total of 16 stages. The process was divided into 9 stages for extraction from a 2M nitric acid feed solution, 3 stages for lanthanide scrubbing, and 4 stages for actinide back-extraction. Excellent feed decontamination factors for Am (7000) and Cm (1000) were obtained and the recoveries of these elements were higher than 99.9%. More than 99.9% of the lanthanides were directed to the raffinate except Gd for which 0.32% was recovered in the product.
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