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Title: Method for extracting lanthanides and actinides from acid solutions by modification of Purex solvent

A process has been developed for the extraction of multivalent lanthanide and actinide values from acidic waste solutions, and for the separation of these values from fission product and other values, which utilizes a new series of neutral bi-functional extractants, the alkyl(phenyl)-N, N-dialkylcarbamoylmethylphosphine oxides, in combination with a phase modifier to form an extraction solution. The addition of the extractant to the Purex process extractant, tri-n-butylphosphate in normal paraffin hydrocarbon diluent, will permit the extraction of multivalent lanthanide and actinide values from 0.1 to 12.0 molar acid solutions.
Inventors:
;
Issue Date:
OSTI Identifier:
6034988
Assignee:
Dept. of Energy EDB-85-036132
Application Number:
ON: TI85005763
Contract Number:
W-31-109-ENG-38
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; ACTINIDES; SOLVENT EXTRACTION; RARE EARTHS; HIGH-LEVEL RADIOACTIVE WASTES; ORGANIC PHOSPHORUS COMPOUNDS; RADIOACTIVE WASTE PROCESSING; TBP; BUTYL PHOSPHATES; ELEMENTS; ESTERS; EXTRACTION; MANAGEMENT; MATERIALS; METALS; ORGANIC COMPOUNDS; PHOSPHORIC ACID ESTERS; PROCESSING; RADIOACTIVE MATERIALS; RADIOACTIVE WASTES; SEPARATION PROCESSES; WASTE MANAGEMENT; WASTE PROCESSING; WASTES; 052001* - Nuclear Fuels- Waste Processing