Ion exchange purification of scandium

Patent · Tue Oct 23 00:00:00 EDT 1990

OSTI ID:7070258

Herchenroeder, L A; Burkholder, H R

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): US 4965053; A
• Application Number: PPN: US 7-310044
• OSTI ID: 7070258
• Resource Relation: Patent File Date: 10 Feb 1989
• Country of Publication: United States
• Language: English

Related Subjects

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