Method for removing noble metal from noble-metal-containing shaped catalyst bodies

Method for removing noble metal from noble-metal-containing shaped catalyst bodies which comprise shaped bodies and noble metal, wherein the noble metal to be removed comprises at least one noble metal selected from the group consisting of Au, Ag, Pd, Pt, Ir, Rh, Ru, Os and Re, said method comprisin...

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Bibliographische Detailangaben
Hauptverfasser:	Roehlich, Christoph, Schapp, Jan, Thiel, Vasco, Voss, Steffen, Fuchs Alameda, Stefanie
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 THEIR RELEVANT APPARATUS TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	Method for removing noble metal from noble-metal-containing shaped catalyst bodies which comprise shaped bodies and noble metal, wherein the noble metal to be removed comprises at least one noble metal selected from the group consisting of Au, Ag, Pd, Pt, Ir, Rh, Ru, Os and Re, said method comprising the steps of (a) producing a mixture of noble-metal-containing shaped catalyst bodies in at least one, at least 1N mineral acid, (b) feeding inert or oxidizing gas into the mixture comprising noble-metal-containing shaped catalyst bodies and mineral acid, (c) introducing at least one oxidant in solid or liquid form into the mixture comprising noble-metal-containing shaped catalyst bodies and mineral acid, and (d) separating the shaped bodies from the liquid.