Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Patent
1994-06-23
1995-08-01
Therkorn, Ernest G.
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
210656, 210657, 210659, 2101982, 423 215, 423263, B01D 1508
Patent
active
054377951
ABSTRACT:
A process for the partial or complete simultaneous separation of isotopes of erbium, especially high thermal neutron capture cross-section erbium isotopes, using continuous, steady-state, chromatography in which an ion exchange resin is the stationary phase, an aqueous solution of ions based on a mixture of erbium isotopes is the feed phase, and an aqueous acid eluant solution is the mobile phase. The process involves the mobile phase eluting or desorbing the erbium isotopic solute adsorbed on the stationary phase under conditions such that each of the various naturally occurring isotopes of erbium is primarily eluted in an elution volume distinct from the elution volumes of the other isotopes. In a preferred embodiment, the conditions are such that at least one of the elution volumes contains essentially only one isotope of erbium. The process is preferably conducted in a continuous, steady-state manner, and in particular is preferably conducted in a continuous annular chromatograph (CAC).
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Beleski Richard J.
Nayak Umesh P.
Peterson Steven H.
Snyder Thomas S.
Therkorn Ernest G.
Westinghouse Electric Corporation
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