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Title: 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:
 [1];  [2]
  1. (Noblesville, IN)
  2. (Ames, IA)
Issue Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA; Iowa State University, Ames, IA (US)
OSTI Identifier:
867568
Patent Number(s):
4965053
Application Number:
07/310,044
Assignee:
Iowa State University Research Foundation, Inc. (Ames, IA) AMES
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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