Comparative evaluation of DHDECMP (dihexyl-N,N-diethylcarbamoyl-methylphosphonate) and CMPO (octylphenyl-N,N,-diisobutylcarbamoylmethylphosphine oxide) as extractants for recovering actinides from nitric acid waste streams
Certain neutral, bifunctional organophosphorous compounds are of special value to the nuclear industry. Dihexyl-N,N-diethylcarbomoylmethylphosphonate (DHDECMP) and octylphenyl-N,N-diisobutylcarbamoylmethylphosphine oxide (CMPO) are highly selective extractants for removing actinide and lanthanide elements from nitric acid. We obtained these two extractants from newly available commercial sources and evaluated them for recovering Am(III), Pu(IV), and U(VI) from nitric acid waste streams of plutonium processing operations. Variables included the extractant (DHSECMP or CMPO), extractant/tributylphosphate ratio, diluent, nitrate concentration, nitrate salt/nitric acid ratio, fluoride concentration, and contact time. Based on these experimental data, we selected DHDECMP as the perferred extractant for this application. 18 refs., 30 figs.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 5354277
- Report Number(s):
- LA-11191; ON: DE88007154
- Country of Publication:
- United States
- Language:
- English
Similar Records
Transuranic decontamination of nitric acid solutions by the TRUEX solvent extraction process: preliminary development studies. [Octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine oxide]
Development of supercritical fluid chromatography for analysis of TRUEX process solvents. [N,N-diisobutylcarbamoylmethylphosphine oxide (CMPO)]
Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
AMERICIUM
SOLVENT EXTRACTION
DHDECMP
SOLVENT PROPERTIES
ORGANIC SOLVENTS
PHOSPHINE OXIDES
PLUTONIUM
RADIOACTIVE WASTE PROCESSING
URANIUM
ACTINIDES
COMPARATIVE EVALUATIONS
FLUORIDES
NITRIC ACID
RADIOACTIVE EFFLUENTS
REPROCESSING
TBP
BUTYL PHOSPHATES
ELEMENTS
ESTERS
EXTRACTION
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
MANAGEMENT
MATERIALS
METALS
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
OXYGEN COMPOUNDS
PHOSPHINES
PHOSPHONIC ACID ESTERS
PHOSPHORIC ACID ESTERS
PHOSPHORUS COMPOUNDS
PROCESSING
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
SEPARATION PROCESSES
SOLVENTS
TRANSPLUTONIUM ELEMENTS
TRANSURANIUM ELEMENTS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
400105* - Separation Procedures
052001 - Nuclear Fuels- Waste Processing