The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 20, 1984
Filed:
Aug. 12, 1983
Applicant:
Inventors:
Hartmut Pietsch, Bad Homburg, DE;
Wolfgang Turke, Schoneck, DE;
Ernst Bareuther, Butzbach, DE;
Fritz Kampf, Lunen, DE;
Hubert Bings, Lunen, DE;
Assignees:
Metallgesellschaft AG, Frankfurt am Main, DE;
Vereinigte Aluminum-Werke AG, Bonn, DE;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C22B / ;
U.S. Cl.
CPC ...
423 30 ; 423 31 ; 75 99 ; 75105 ; 7511 / ; 204D / ;
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.