Process for removing precious metal from precious metal-containing catalyst form bodies

US10378082B2 · kind B2 · utility

Assignee

• HERAEUS DEUTSCHLAND GMBH & CO. KG · DE

Inventors

• Christoph Roehlich · Hanau, DE
• Vasco Thiel · Alzenau, DE
• Stefanie Fuchs-Alameda · Bad Orb, DE
• Jan Schapp · Potsdam, DE
• Steffen Voss · Limeshain, DE

Key dates

• Filing date: Oct 12, 2015
• Grant date: Aug 13, 2019
• Expiry date: Mar 22, 2036

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P10/20
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Process for removing precious metal from precious metal-containing catalyst form bodies comprising form bodies and precious metal, whereby the precious metal to be removed is at least one precious metal selected from the group consisting of Au, Ag, Pd, Pt, Ir, Rh, Ru, Os, and Re, comprising the steps of: (a) producing a mixture of precious metal-containing catalyst form bodies in at least one mineral acid that is at least 1N; (b) supplying inert or oxidizing gas into the mixture containing noble metal-containing catalyst form bodies and mineral acid; (c) introducing at least one oxidation agent, in solid or liquid form, into the mixture containing noble metal-containing catalyst form body and mineral acid; and (d) separating the form bodies from the liquid.