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:
Feb. 01, 1977
Filed:
Apr. 12, 1976
Applicant:
Inventor:
David John Gannon, St-Bruno, CA;
Assignee:
Canadian Industries Limited, Montreal, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B03D / ; C22B / ;
U.S. Cl.
CPC ...
75-2 ; 209166 ; 423 26 ;
Abstract
A process for the recovery of copper minerals from oxidized ores by flotation employing sulphidization of the oxidized minerals followed by flotation employing a tetraalkylammonium halide as collector. Preferably, a prior flotation step with a xanthate collector is employed, especially when the ore contains substantial amounts of unoxidized sulphide minerals. Using the preferred embodiment of the process it is possible to recover 10% more copper from an oxidized copper ore than is possible with sulphidization and xanthate flotation steps alone.