Ion exchange purification of scandium
An improvement in purification of scandium through ion exchange chromatography is disclosed in which the oxidation potential of the eluting solution is altered by the addition of potassium chlorate or ammonium chloride so that removal of contaminants is encouraged. The temperature, pH and concentration of the eluent HEDTA are controlled in order to maintain the scandium in the column while minimizing dilution of the scandium band. Recovery of scandium is improved by pumping dilute scandium over the column prior to stripping the scandium and precipitation. This eliminates the HEDTA ion and other monovalent cations contaminating the scandium band. This method maximizes recovery of scandium while maintaining purity. 2 figs.
- DOE Contract Number:
- W-7405-ENG-82
- Assignee:
- Iowa State Univ. Research Foundation, Inc., Ames, IA (United States)
- Patent Number(s):
- A; US 4965053
- Application Number:
- PPN: US 7-310044
- OSTI ID:
- 7070258
- Country of Publication:
- United States
- Language:
- English
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400105* -- Separation Procedures
ADDITIVES
ALKALI METAL COMPOUNDS
AMMONIUM CHLORIDES
AMMONIUM COMPOUNDS
AMMONIUM HALIDES
CHLORATES
CHLORIDES
CHLORINE COMPOUNDS
CHROMATOGRAPHY
ELEMENTS
HALIDES
HALOGEN COMPOUNDS
ION EXCHANGE CHROMATOGRAPHY
MANAGEMENT
MATERIALS RECOVERY
METALS
OXYGEN COMPOUNDS
POTASSIUM COMPOUNDS
PROCESSING
SCANDIUM
SEPARATION PROCESSES
TRANSITION ELEMENTS
WASTE MANAGEMENT
WASTE PROCESSING