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:
Dec. 20, 1977
Filed:
Dec. 01, 1976
Applicant:
Inventor:
Ernest Peters, Vancouver, CA;
Assignee:
Texasgulf Canada Ltd., Toronto, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22B / ;
U.S. Cl.
CPC ...
7510 / ; 75104 ; 75115 ; 75117 ; 7511 / ; 75120 ; 204117 ; 204119 ;
Abstract
Sulfide concentrates containing metals such as lead, zinc, copper and silver are treated to selectively recover these metals in high yields in a process wherein the concentrate is sequentially leached or extracted with sulfuric acid in the presence of oxygen; lime in the presence of sulfide ion; and ferric chloride. The leach solutions resulting from each extraction may then be treated to recover metals in their elemental state. The process does not produce sulfur oxides.