ZIRCONIUM AND HAFNIUM SEPARATION IN SULFATE SOLUTIONS USING CONTINUOUS ION EXCHANGE CHROMATOGRAPHY

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...

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Bibliographische Detailangaben
Hauptverfasser:	NAYAK, UMESH, BELESKI, RICHARD, BYERS, CHARLES, SISSON, WARREN, SNYDER, THOMAS STEPHEN, FRANCIS, TIMOTHY LLOYD
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F FERROUS OR NON-FERROUS ALLOYS INORGANIC CHEMISTRY INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING METALLURGY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PHYSICS PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS SEPARATION TESTING THEIR RELEVANT APPARATUS TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	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.