Separation of hafnium from zirconium in sulfuric acid solutions using pressurized ion exchange [electronic resource].
- Published
- Oak Ridge, Tenn. : Oak Ridge National Laboratory, 1981.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Physical Description
- Pages: 20 : digital, PDF file
- Additional Creators
- Oak Ridge National Laboratory and United States. Department of Energy. Office of Scientific and Technical Information
Access Online
- Restrictions on Access
- Free-to-read Unrestricted online access
- Summary
- High-resolution pressurized ion exchange has been used successfully to study and separate hafnium and zirconium sulfate complexes by chromatographic elution from Dowex 50W-X8 (15 to 25 ..mu..m) resin with sulfuric acid solutions. Techniques were developed to continuously monitor the column effluents for zirconium and hafnium by reaction with fluorometric and colorimetric reagents. Since neither reagent was specific for either metal ion, peak patterns were initially identified by using the stable isotopes /sup 90/Zr and /sup 180/Hf as fingerprints of their elution position. Distribution ratios for both zirconium and hafnium decrease as the inverse fourth power of the sulfuric acid concentration below 2N and as the inverse second power at higher acid concentration. The hafnium-to-zirconium separation factor is approximately constant (approx. 8) over the 0.5 to 3N range. Under certain conditions, an unseparated fraction was observed that was not retained by the resin. The amount of this fraction which is thought to be a polymeric hydrolysis product appears to be a function of metal and sulfuric acid concentrations. Conditions are being sought to give the highest zirconium concentration and the lowest acid concentration that can be used as a feed material for commercial scale-up in the continuous annular chromatographic (CAC) unit without formation of the polymer.
- Report Numbers
- E 1.99:conf-810203-5
conf-810203-5 - Subject(s)
- Other Subject(s)
- Hafnium
- Ion Exchange Chromatography
- Zirconium
- Design
- Distribution Functions
- Equipment
- Extraction Columns
- Resins
- Sulfuric Acid
- X-Ray Fluorescence Analysis
- Chemical Analysis
- Chromatography
- Elements
- Extraction Apparatuses
- Functions
- Hydrogen Compounds
- Inorganic Acids
- Metals
- Nondestructive Analysis
- Organic Compounds
- Organic Polymers
- Petrochemicals
- Petroleum Products
- Polymers
- Refractory Metals
- Separation Processes
- Transition Elements
- X-Ray Emission Analysis
- Note
- Published through SciTech Connect.
01/01/1981.
"conf-810203-5"
AIME annual meeting, Chicago, IL, USA, 22 Feb 1981.
Hurst, F.J. - Funding Information
- W-7405-ENG-26
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