Ion exchange method for the purification of scandium

Patent · Tue May 28 04:00:00 EDT 1991

OSTI ID:6267587

Rourke, W J; Natansohn, S

This patent describes a process for purifying scandium. It comprises adjusting the pH of an aqueous solution containing scandium with base to between approximately 2.05 and 3.5; adding a chelating resin having an iminodiacetic acid functionality in the hydrogen form to the aqueous solution containing scandium and allowing the resulting slurry to equilibrate; adjusting the pH of the slurry containing scandium and chelating resin with base to between approximately 1.9 to 2.25; collecting the slurry from rinsing the collected slurry with dilute mineral acid; passing diglycolic acid through the collected slurry; passing the diglycolic containing scandium through a chelating resin; collecting the diglycolic acid coming out of the chelating resin; passing the diglycolic acid collected through a strong cation exchange resin; passing an ammonium nitrate solution through the strong cation exchange resin; adding oxalic acid to the collected ammonium nitrate solution; and collecting the scandium oxalate precipitate.

• Assignee: GTE Lab. Inc., Waltham, MA (USA)
• Patent Number(s): A; US 5019362
• Application Number: PPN: US 7-423312
• OSTI ID: 6267587
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105 -- Separation Procedures
400202* -- Isotope Effects
Isotope Exchange
& Isotope Separation
AMMONIUM COMPOUNDS
AMMONIUM NITRATES
CHEMICAL REACTION KINETICS
CHROMATOGRAPHY
DISPERSIONS
ELEMENTS
ION EXCHANGE CHROMATOGRAPHY
KINETICS
MANAGEMENT
MATERIALS RECOVERY
METALS
MIXTURES
NITRATES
NITROGEN COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
POLYMERS
PROCESSING
PURIFICATION
REACTION KINETICS
RECOVERY
RESINS
SCANDIUM
SEPARATION PROCESSES
SLURRIES
SUSPENSIONS
TRANSITION ELEMENTS
WASTE MANAGEMENT
WASTE PROCESSING