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:
Apr. 17, 2018
Filed:
Oct. 13, 2014
Metals Technology Development Company, Llc, St. Louis, MO (US);
Timothy Roy Hymer, Labadie, MO (US);
Bruce David Chamberlain, Festus, MO (US);
Karl Friedrich Schneider, St. Louis, MO (US);
Massimo Giuseppe Maccagni, Sesto San Giovanni, IT;
METALS TECHNOLOGY DEVELOPMENT COMPANY, LLC, St. Louis, MO (US);
Abstract
A method of recovering metal values from metal-bearing materials such as slags and drosses includes the steps of pulverizing the material to particles less than about 100 μm; leaching the pulverized material with a solution of ammonium chloride, sodium chloride, and potassium chloride; sequentially recovering at least two metals from the leachate by the addition of zinc using a sequential cementation process; and recovering zinc from the solution by electrowinning.