SEPARATION AND SPECTROPHOTOMETRIC DETERMINATION OF RARE EARTHS

Technical Report · Thu Oct 18 00:00:00 EDT 1962

OSTI ID:4725477

Onishi, H; Banks, C V

The separation of rare earths and Y from interfering elements was studied, and a method was proposed. Rare earths are precipitated as fluorides using CaF/sub 2/ as the carrier. Thorium and Zr are removed by extraction with thenoyitrifluoroacetone (TTA) in xylene at pH 1.3. Small amounts of residual Al and Fe are removed by extraction with 8-quinolinol -chloroform at pH 4.5. Rare earths are separated from Ca by TTA extraction at the same pH, and they are then back-extracted into 1 M HNO/sub 3/. After evaporation of the solution, the rare earths are determined spectrophotometrically with arsenazo. (P.C.H.)

• Research Organization: Ames Lab., Ames, Iowa
• DOE Contract Number: W-7405-ENG-82
• NSA Number: NSA-17-023253
• OSTI ID: 4725477
• Report Number(s): IS-561
• Country of Publication: United States
• Language: English

Related Subjects

ACETONE
ACIDITY
ALUMINUM
ARSENAZO
CALCIUM
CALCIUM FLUORIDES
CHEMISTRY
CHLORINATED HYDROCARBONS
CHLOROFORM
COMPLEXES
EVAPORATION
FLUORIDES
FLUORINATED HYDROCARBONS
IMPURITIES
INTERFERENCE
IRON
NITRIC ACID
PHOTOMETRY
PRECIPITATION
QUANTITATIVE ANALYSIS
RARE EARTHS
SEPARATION PROCESSES
SOLUTIONS
SOLVENT EXTRACTION
SPECTROSCOPY
THORIUM
TTA
XYLENE
YTTRIUM
ZIRCONIUM