RECOVERY OF STRONTIUM AND RARE EARTHS FROM PUREX WASTES BY SOLVENT EXTRACTION

Technical Report · Sun Jan 28 23:00:00 EST 1962

DOI:https://doi.org/10.2172/4801338· OSTI ID:4801338

Wischow, R. P.; Horner, D. E.

A solvent extraction flowsheet was developed for recovery of strontium- 90 and mixed rare-earth fission products from adjusted Purex 1WW waste solution by di(2-ethylhexyl)phosphoric acid (D2EHPA) in Amsco l25-82 modified with tributyl phosphate (TBP). First cycle feed is prepared by adding tartrate and caustic to the waste solution to complex the iron and adjust the pH. Strontium and rare earths are coextracted with D2EHPA-TBP-Amsco and stripped with nitric acid in the first cycle, and then isolated as concentrated product solutions by processing through additional solvent extraction cycles. Satisfactory product recoveries and physical operation were demonstrated in bench-scale batch and continuous countercurrent tests with simulated, unirradiated, feed solutions. (auth)

• Research Organization: Oak Ridge National Lab., Tenn.
• DOE Contract Number: W-7405-ENG-26
• NSA Number: NSA-16-008439
• OSTI ID: 4801338
• Report Number(s): ORNL-3204
• Country of Publication: United States
• Language: English

Related Subjects

ALKYL RADICALS
AMSCO
BUTYL PHOSPHATES
COMPLEXES
COUNTER CURRENT
DEHPA
IRON
NITRIC ACID
ORGANIC ACIDS
ORGANIC PHOSPHORUS COMPOUNDS
PHOSPHORIC ACID
PUREX PROCESS
RARE EARTHS
RECOVERY
SOLVENT EXTRACTION
STRONTIUM 90
TARTARIC ACID
WASTE DISPOSAL AND PROCESSING
WASTE PROCESSING
WASTE SOLUTIONS