Method of extracting gold and silver from an ore

US4438076A · kind A · utility

Assignees

• Metallgesellschaft AG · DE
• Vereinigte Aluminum - Werke Aktiengesellschaft · DE

Inventors

• Hartmut Pietsch · Bad Homburg vor der Höhe, DE
• Wolfgang Turke · Schöneck, DE
• Ernst Bareuther · Rockenberg, DE
• Fritz Kampf · Grafenau, DE
• Hubert Bings · Grafenau, DE

Key dates

• Filing date: Aug 12, 1983
• Grant date: Mar 20, 1984
• Expiry date: Aug 12, 2003

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S204/13
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Gold and/or silver is leached from comminuted ore with an alkaline cyanide lixiviant at a superatmospheric pressure of at least 25 bar and with high purity oxygen (at least 90% pure) to reduce the residence time at high yield.