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U.S. Department of Energy
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METHOD OF SEPARATING RARE EARTH METAL IONS

Patent ·
OSTI ID:4833844
A method for separating rare earth metal ions by cation exchange is given. The method comprises sorbing the metal ions on the hydrogen form of a sulfonic acid type cation exchange resin, eluting the metals from the resin with a 0.01 to 0.1 M aqueous solution of an alkali salt of diethylenetriamine pentaacetic acid, and collecting successive fractions of the effluent liquid. The resin preferably should swell appreciably in water and should consist of sulfonated copolymers of 96 to 94% of monovinyl aromatic hydrocarbons and 4 to 6% divinylbenzene. Several examples of the method are given. (D.L.C.)
Research Organization:
Dow Chemical Co.
NSA Number:
NSA-16-017776
Assignee:
DTIE; NSA-16-017776
Patent Number(s):
US 3033646
OSTI ID:
4833844
Country of Publication:
United States
Language:
English