Method for dissolving noble metals out of segregated ores containing noble metals

US6440376B1 · kind B1 · utility

Assignee

• W.C. Heraeus GmbH & Co. KG · DE

Inventors

• Martin Stettner · Salzbergen, DE
• Matthias Grehl · Frankfurt, DE
• Horst Meyer

Key dates

• Filing date: Jun 16, 2000
• Grant date: Aug 27, 2002
• Expiry date: Jun 16, 2020

Classification

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

Abstract

A method for dissolving noble metals out of segregated ores containing noble metals, comprising:reducing noble metal oxides present to the individual metals in finely divided form;oxidating the segregated ores and/or the noble metals with HCl and chlorate to yield a solution or suspension having a concentration of H+ ions of at least 1 mol/l, a concentration of Cl− ions of at least 1 mol/l and a temperature of at least 50° C.