Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group ivb metal
Patent
1996-10-18
1998-06-09
Bos, Steven
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group ivb metal
423 73, 423 79, C01G 2500, C01G 2700
Patent
active
057628904
ABSTRACT:
A method and system for improved ion exchange chromatographic elemental separations of zirconium and hafnium elements and also, if desired, separations of the isotopes thereof from crude zirconium minerals by using improved crude aqueous zirconium (also containing hafnium) chloride feedstock solutions, aqueous chloride eluant solutions, cationic or anionic exchange resins, and reduced ion exchange chromatographic operating temperatures. The method and system of the invention provides improved crude aqueous zirconium chloride feedstock solutions by carbochlorinating zircon sand and hydrolyzing and dissolving the chlorination products under controlled conditions to substantially eliminate cross-polymerization of the carbochlorination products, which undesirably yield inseparable zirconium and hafnium co-polymers during hydrolysis, by inhibiting the hydrolysis exotherm and/or the free acid generation during hydrolysis.
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Beleski Richard J.
Byers Charles H.
Francis Timothy L.
Nayak Umesh P.
Sisson Warren G.
Bos Steven
Westinghouse Electric Corporation
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