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:
May. 08, 1979
Filed:
May. 31, 1978
Applicant:
Inventors:
Nathaniel Arbiter, Vail, AZ (US);
Benjamin D Cooley, Tucson, AZ (US);
Assignee:
The Anaconda Company, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22B / ; C22B / ; C22B / ;
U.S. Cl.
CPC ...
204106 ; 204112 ; 204115 ; 75103 ; 75117 ; 75119 ; 75120 ; 423 33 ; 423109 ; 423150 ;
Abstract
In the recovery of copper, nickel or zinc from sulfide ores by leaching with ammonium sulfate solution containing free ammonia in the presence of oxygen to form a leach solution containing dissolved copper, nickel or zinc ammonia sulfate complex, an alkaline metal hydroxide (preferably calcium hydroxide) is introduced into the leaching operation to precipitate the sulfate ion formed and to release ammonia combined therewith as ammonium ion.