Ion exchange purification of scandium
Abstract
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.
- Inventors:
-
- Noblesville, IN
- Ames, IA
- Issue Date:
- Research Org.:
- Ames Laboratory (AMES), Ames, IA; Iowa State Univ., Ames, IA (United States)
- OSTI Identifier:
- 867568
- Patent Number(s):
- 4965053
- Application Number:
- 07/310,044
- Assignee:
- Iowa State University Research Foundation, Inc. (Ames, IA)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01F - COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
C - CHEMISTRY C22 - METALLURGY C22B - PRODUCTION AND REFINING OF METALS
- DOE Contract Number:
- W-7405-ENG-82
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- exchange; purification; scandium; improvement; chromatography; disclosed; oxidation; potential; eluting; solution; altered; addition; potassium; chlorate; ammonium; chloride; removal; contaminants; encouraged; temperature; ph; concentration; eluent; hedta; controlled; maintain; column; minimizing; dilution; band; recovery; improved; pumping; dilute; prior; stripping; precipitation; eliminates; monovalent; cations; contaminating; method; maximizes; maintaining; purity; ammonium chloride; monovalent cation; oxidation potential; exchange chromatography; /423/210/
Citation Formats
Herchenroeder, Laurie A, and Burkholder, Harvey R. Ion exchange purification of scandium. United States: N. p., 1990.
Web.
Herchenroeder, Laurie A, & Burkholder, Harvey R. Ion exchange purification of scandium. United States.
Herchenroeder, Laurie A, and Burkholder, Harvey R. Tue .
"Ion exchange purification of scandium". United States. https://www.osti.gov/servlets/purl/867568.
@article{osti_867568,
title = {Ion exchange purification of scandium},
author = {Herchenroeder, Laurie A and Burkholder, Harvey R},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1990},
month = {10}
}
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