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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. 2 figs.

Inventors:
;
Issue Date:
OSTI Identifier:
7070258
Patent Number(s):
4965053 A
Application Number:
PPN: US 7-310044
Assignee:
Iowa State Univ. Research Foundation, Inc., Ames, IA (United States) PTO; EDB-94-117239
DOE Contract Number:  
W-7405-ENG-82
Resource Type:
Patent
Resource Relation:
Patent File Date: 10 Feb 1989
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; SCANDIUM; ION EXCHANGE CHROMATOGRAPHY; MATERIALS RECOVERY; ADDITIVES; AMMONIUM CHLORIDES; CHLORATES; POTASSIUM COMPOUNDS; ALKALI METAL COMPOUNDS; AMMONIUM COMPOUNDS; AMMONIUM HALIDES; CHLORIDES; CHLORINE COMPOUNDS; CHROMATOGRAPHY; ELEMENTS; HALIDES; HALOGEN COMPOUNDS; MANAGEMENT; METALS; OXYGEN COMPOUNDS; PROCESSING; SEPARATION PROCESSES; TRANSITION ELEMENTS; WASTE MANAGEMENT; WASTE PROCESSING; 400105* - Separation Procedures

Citation Formats

Herchenroeder, L.A., and Burkholder, H.R. Ion exchange purification of scandium. United States: N. p., 1990. Web.
Herchenroeder, L.A., & Burkholder, H.R. Ion exchange purification of scandium. United States.
Herchenroeder, L.A., and Burkholder, H.R. Tue . "Ion exchange purification of scandium". United States.
@article{osti_7070258,
title = {Ion exchange purification of scandium},
author = {Herchenroeder, L.A. and Burkholder, H.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. 2 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1990},
month = {10}
}