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:
Jan. 06, 1987
Filed:
Jul. 30, 1985
Applicant:
Inventor:
Leonard R Ochs, Tucson, AZ (US);
Assignee:
Duval Corporation, Tucson, AZ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C22B / ;
U.S. Cl.
CPC ...
75117 ; 75-2 ; 75 9 / ; 75114 ; 7511 / ; 75121 ; 423 38 ; 423 53 ; 4235 / ; 204107 ;
Abstract
An improved hydrometallurgical process for the recovery of metallic copper, elemental sulfur, compounds of molybdenum and other valuable materials from copper sulfide ore concentrates, such as chalcopyrite. The process, comprising a reduction stage, metallic copper recovery stage, and a combined regeneration-purge-oxidation stage, is improved by the addition of a second reduction stage following the first or primary reduction stage, and by the addition of a by-product recovery stage after the second or secondary reduction stage. The secondary reduction stage also enhances overall process performance by allowing more flexible operating practices.