Liquid purification or separation – Processes – Chromatography
Patent
1990-09-24
1991-09-03
Therkorn, Ernest G.
Liquid purification or separation
Processes
Chromatography
210635, 2101982, 423 215, 4236585, B01D 1508
Patent
active
050452096
ABSTRACT:
Scandium and yttrium present in sand is recovered from the residue pulled from sand chlorinators. The residue is digested with an acid to produce a liquid containing scandium, yttrium, sodium, calcium and at least one radioactive metal of the group consisting of radium, thorium and uranium. The metal-containing liquid is then fed through a cation exchanger. The cation exchanger is eluted with an acid to produce eluate functions containing at least partially separated metals. A first eluate fraction contains at least half of the calcium and the sodium, a second eluate fraction contains at least half of the radioactive metals, a third eluate fraction contains at least half of the scandium and a fourth eluate fraction contains at least half of the yttrium which were contained in the metal-containing feed.
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Snyder Thomas S.
Stoltz Richard A.
Therkorn Ernest G.
Valentine J. C.
Westinghouse Electric Corp.
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