Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group ivb metal
Patent
1990-10-10
1992-12-29
Morris, Theodore
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group ivb metal
423 69, 423 73, 423 2, 423DIG7, 210656, 75612, B01D 1508, C22B 3414
Patent
active
051749718
ABSTRACT:
The thermal neutron capture cross-section of zirconium may be altered by altering its natural isotope distribution through a steady state chromatographic separation of these isotopes using an anion exchange resin as the stationary phase of the chromatographic column. Zirconium is dissolved in a very strong acid which causes the formation of a zirconium anion, such as the ZrOCl.sub.4.sup.-2 anion formed in six normal hydrochloric acid, and eluted off the column with a weaker acid. Distinct elution volumes representative of each isotope are collected. In a preferred embodiment, the process also separates the zirconium from hafnium and the other impurities normally present in the product obtained by chlorinating zircon sand and utilizes a continuous annular chromatograph.
REFERENCES:
patent: 4360501 (1982-11-01), Bir et al.
patent: 5023061 (1991-06-01), Snyder et al.
patent: 5024749 (1991-06-01), Snyder et al.
Journal of Chromatography, 325 (1985) 195-206 Kogure et al.
Journal of Chromatography, 259 (1983) 480-486 Kogure et al.
Lahoda Edward J.
Lee Ernest D.
Skriba Michael C.
Snyder Thomas S.
Morris Theodore
Squillante Edward
Westinghouse Electric Corp.
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