Chromatographic interseparation of platinum group metals

The invention relates to a chromatographic method for interseparating platinum group metals from a feed solution, wherein the feed solution is oxidated prior to the chromatographic separation to reach a redox-potential of at least 900 mV, whereupon the solution may be aged for at least 12 hours to a...

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Bibliographische Detailangaben
Hauptverfasser:	YUXING SHANG, ADALBERT PRIOR
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY FERROUS OR NON-FERROUS ALLOYS METALLURGY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS SEPARATION THEIR RELEVANT APPARATUS TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	The invention relates to a chromatographic method for interseparating platinum group metals from a feed solution, wherein the feed solution is oxidated prior to the chromatographic separation to reach a redox-potential of at least 900 mV, whereupon the solution may be aged for at least 12 hours to achieve maximum conversion of Ir(III) to Ir (IV). After elution of the Rh and Pt fractions reductive step elution is performed to accelerate elution of at least the Ir fraction. Iridium and rhodium are collected in different fractions of high purity.