The University of British Columbia

Jetti Resources, LLC

Edouard Asselin

David Dixon

Zihe Ren

Ahmad Ghahreman

Oscar Olvera Olmedo

Nelson Mora Huertas

Hamidreza Zebardast

Jing Liu

This application pertains to methods of recovering metals from metal sulfides that involve contacting the metal sulfide with an acidic sulfate solution containing ferric sulfate and a reagent that has a thiocarbonyl functional group, wherein the concentration of reagent in the acidic sulfate solution is sufficient to increase the rate of metal ion extraction relative to an acidic sulfate solution that does not contain the reagent, to produce a pregnant solution containing the metal ions.

Process for leaching metal sulfides with reagents having thiocarbonyl functional groups

Methods for in situ measurement of an oxidation reduction potential (ORP) and pH of a solution comprising iron are provided. The methods comprise measuring a kinetic parameter at an electrode surface of an electrode system comprising a working electrode, a counter electrode and a pseudo-reference electrode, wherein the kinetic parameter is associated with ferric reduction or both ferric reduction and ferrous oxidation and comparing the kinetic parameter to calibration data for the electrode system to determine the ORP and pH of the solution. Also provided are apparatus and systems for in situ measurement of an ORP and pH of a solution comprising iron. The apparatus and systems comprise an electrode system comprising a working electrode, a counter electrode and a pseudo-reference electrode and a detector for measuring a kinetic parameter at an electrode surface of the electrode system.

Apparatus, systems and methods for in situ measurement of an oxidation / reduction potential and pH of a solution

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Richmond, CA, United States of America

Edouard Asselin