Selective chelation and extraction of lanthanides and actinides with supercritical fluids

Technical Report · Sat Jan 01 04:00:00 UTC 1994

DOI:https://doi.org/10.2172/10146235· OSTI ID:10146235

Brauer, R D; Carleson, T E; Harrington, J D; Jean, F; Jiang, H; Lin, Y; Wai, C M

This report is made up of three independent papers: (1) Supercritical Fluid Extraction of Thorium and Uranium with Fluorinated Beta-Diketones and Tributyl Phosphate, (2) Supercritical Fluid Extraction of Lanthanides with Beta-Diketones and Mixed Ligands, and (3) A Group Contribution Method for Predicting the Solubility of Solid Organic Compounds in Supercritical Carbon Dioxide. Experimental data are presented demonstrating the successful extraction of thorium and uranium using fluorinated beta-diketones to form stable complexes that are extracted with supercritical carbon dioxide. The conditions for extracting the lanthanide ions from liquid and solid materials using supercritical carbon dioxide are presented. In addition, the Peng-Robison equation of state and thermodynamic equilibrium are used to predict the solubilities of organic solids in supercritical carbon dioxide from the sublimation pressure, critical properties, and a centric factor of the solid of interest.

• Research Organization: EG and G Idaho, Inc., Idaho Falls, ID (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC07-76ID01570
• OSTI ID: 10146235
• Report Number(s): EGG-WTD--10993; ON: DE94010703
• Country of Publication: United States
• Language: English

Related Subjects

054000
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
54 ENVIRONMENTAL SCIENCES
540250
CARBON DIOXIDE
CHELATES
DECONTAMINATION
EUROPIUM
EXPERIMENTAL DATA
HEALTH AND SAFETY
LANTHANUM
LUTETIUM
RARE EARTHS
REMEDIAL ACTION
SITE RESOURCE AND USE STUDIES
SOILS
SOLUBILITY
SOLVENT PROPERTIES
SUPERCRITICAL GAS EXTRACTION
THORIUM
URANIUM