PROCESS FOR SEPARATING HAFNIUM AND ZIRCONIUM

A process for separating hafnium and zirconium, in particular from a sulfate based solution is provided. The process includes the steps of: concentrating an acidic sulfate based solution containing zirconium and hafnium, the solution having a hafnium:zirconium weight ratio as given by Hf/(Hf+Zr) gre...

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Hauptverfasser:	FAINERMAN-MELNIKOVA, Marina, SOLDENHOFF, Karin Helene, QUINN, James, GOUGH, Ian
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F FERROUS OR NON-FERROUS ALLOYS INORGANIC CHEMISTRY METALLURGY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS SEPARATION TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	A process for separating hafnium and zirconium, in particular from a sulfate based solution is provided. The process includes the steps of: concentrating an acidic sulfate based solution containing zirconium and hafnium, the solution having a hafnium:zirconium weight ratio as given by Hf/(Hf+Zr) greater than the typical weight ratio of naturally occurring zirconium ores and/or concentrates; heating the solution; contacting the solution with an amine based solvent to create a hafnium rich, high purity rafinate and a zirconium loaded solvent; and stripping the zirconium loaded solvent to produce a stripped solvent and a zirconium loaded strip.