Liquid extraction procedure for the recovery of scandium
This patent describes a method for recovering scandium. It comprises: dissolving scandium from a solid comprising iron, manganese, and scandium to form an aqueous solution comprising an amount of the scandium, and the iron. The amount of the iron in the aqueous solution being greater than the amount of the scandium in the solution; reducing any ferric iron in the aqueous solution containing the scandium; adjusting the product from step 2 containing the scandium to an acidic pH from about 1.8 to about 2.0 to form an acidic solution; selectively extracting the scandium with respect to iron from the acidic solution by contacting the acidic solution with an organic mixture forming an organic mixture containing the scandium. The organic mixture comprising an organic extractant and an organic solvent, the organic extractant comprising thenoyltrifluoroacetone; contacting the organic mixture containing the scandium with an aqueous stripping solution to transfer the scandium contained in the organic mixture to the aqueous stripping solution. The stripping solution comprising a mineral acid; precipitating the scandium contained in the aqueous stripping solution; and separating the precipitated scandium from the aqueous stripping solution.
- Assignee:
- GTE Lab.oratories Inc., Waltham, MA
- Patent Number(s):
- US 4898719; A
- Application Number:
- PPN: US 7-321603A
- OSTI ID:
- 6880905
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360101* -- Metals & Alloys-- Preparation & Fabrication
ACETONE
AQUEOUS SOLUTIONS
DEMETALLIZATION
DISPERSIONS
DISSOLUTION
ELEMENTS
EXTRACTION
IRON COMPOUNDS
KETONES
MANGANESE COMPOUNDS
METALS
MIXTURES
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC SOLVENTS
RECOVERY
SCANDIUM
SCANDIUM COMPOUNDS
SEPARATION PROCESSES
SOLUTIONS
SOLVENT EXTRACTION
SOLVENTS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS