C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 3/42 (2006.01) B01D 15/02 (2006.01) B01D 59/30 (2006.01) B01J 41/20 (2006.01) C01G 25/00 (2006.01) C22B 34/14 (2006.01) G01N 30/02 (2006.01) G01N 30/58 (2006.01)
Patent
CA 2224090
A method and system for improved continuous ion exchange chromatographic elemental separations of zirconium and hafnium and also for isotopic separations thereof from crude zirconium minerals by using zirconium (also containing hafnium) sulfate feedstock solutions, sulfate eluant solutions, anionic exchange resins, and reduced ion exchange column operating temperatures. The method and system of the invention provides sulfate feedstock solutions by completely converting the carbochlorination products of zircon sand to sulfate solutions prior to feeding to the ion exchange chromatographic column. The method and system of the invention is performed in a continuously operating continuous annular chromatograph (CAC). Nuclear grade substantially purified zirconium and hafnium metals are produced.
Beleski Richard
Byers Charles
Francis Timothy Lloyd
Nayak Umesh
Sisson Warren
Bereskin & Parr
Westinghouse Electric Corporation
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