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:
Jun. 04, 1996
Filed:
Apr. 06, 1995
Robert A Geisler, North York, CA;
Ira E Puddington, Ottawa, CA;
Centaur Mining Exploration Limited, North York, CA;
Abstract
A process is described for solubilizing lead contained in ores mineralized with sulphidic minerals by in-situ leaching with an acetic acid and acetate containing solution in presence of an oxidant. The in-situ leaching is conducted by means of drillholes in the ore body. In another embodiment the acetic acid and acetate containing solution is percolated through a bed of crushed untreated rock or unconsolidated mineral particles, mill tailings and/or agglomerated or unagglomerated sulphidic lead containing waste material, forming a pile or a layer in an open vat, in presence of an oxidant. Lead is recovered from the pregnant lead acetate containing solution and the solution may subsequently be recycled to further leaching of lead sulphidic minerals or lead sulphide containing particles.