John D Wilmot

US Patent:

7736487, Jun 15, 2010

Filed:

May 1, 2007

Appl. No.:

11/743034

Inventors:

John O. Marsden - Paradise Valley AZ, US
John C. Wilmot - Anthem AZ, US
Christy Green - Morenci AZ, US
Wayne W. Hazen - Lakewood CO, US
David R. Baughman - Golden CO, US

Assignee:

Freeport-McMoran Corporation - Phoenix AZ

International Classification:

C25C 1/00

US Classification:

205580, 423 24, 205581, 205582, 205583

Abstract:

The present invention relates generally to a process for recovering copper and/or other metal values from a metal-bearing ore, concentrate, or other metal-bearing material using pressure leaching and direct electrowinning. More particularly, the present invention relates to a substantially acid-autogenous process for recovering copper from chalcopyrite-containing ore using pressure leaching and direct electrowinning in combination with a leaching, solvent/solution extraction and electrowinning operation. In accordance with one aspect of the process, at least a portion of the residue from the pressure leaching operation is directed to a heap, stockpile or other leaching operation.

US Patent:

7824633, Nov 2, 2010

Filed:

Jul 20, 2007

Appl. No.:

11/780850

Inventors:

Peter Amelunxen - Arequipa, PE
John C. Wilmot - Anthem AZ, US
Chris Easton - Highlands Ranch CO, US
Wayne W. Hazen - Lakewood CO, US

Assignee:

Freeport-McMoran Corporation - Phoenix AZ

International Classification:

C01G 37/14

US Classification:

423 58, 423 53, 423 54, 423 55, 4235931, 423606

Abstract:

A system and method for producing molybdenum oxide(s) from molybdenum sulfide are disclosed. The system includes a pressure leach vessel, a solid-liquid separation stage coupled to the pressure leach vessel, a solvent-extraction stage coupled to the solid-liquid separation stage, and a base stripping stage coupled to the solvent-extraction stage. The method includes providing a molybdenum sulfide feed, subjecting the feed to a pressure leach process, subjecting pressure leach process discharge to a solid-liquid separation process to produce a discharge liquid stream and a discharge solids stream, and subjecting the discharge liquid stream to a solvent extraction and a base strip process.

US Patent:

8273237, Sep 25, 2012

Filed:

Jan 16, 2009

Appl. No.:

12/355624

Inventors:

John O. Marsden - Paradise Valley AZ, US
James D. Gillaspie - Gilbert AZ, US
John C. Wilmot - Anthem AZ, US

Assignee:

Freeport-McMoran Corporation - Phoenix AZ

International Classification:

C25C 1/12
C25C 1/00
C25C 1/22

US Classification:

205580, 205568, 205581, 205583, 205584, 205574, 205589, 205604

Abstract:

The present invention relates, generally, to a method and apparatus for recovering metal values from a metal-bearing materials, and more specifically, a process for recovering copper and other metals through leaching, electrowinning using the ferrous/ferric anode reaction, and the synergistic addition of ferrous iron to the leach step.

US Patent:

20110014097, Jan 20, 2011

Filed:

Sep 27, 2010

Appl. No.:

12/891508

Inventors:

Peter Amelunxen - Cayma, PE
John C. Wilmot - Anthem AZ, US
Chris Easton - Highlands Ranch CO, US
Wayne W. Hazen - Lakewood CO, US

Assignee:

FREEPORT-MCMORAN CORPORATION - Phoenix AZ

International Classification:

C01G 39/02

US Classification:

423 54

Abstract:

A system and method for producing molybdenum oxide(s) from molybdenum sulfide are disclosed. The system includes a pressure leach vessel, a solid-liquid separation stage coupled to the pressure leach vessel, a solvent-extraction stage coupled to the solid-liquid separation stage, and a base stripping stage coupled to the solvent-extraction stage. The method includes providing a molybdenum sulfide feed, subjecting the feed to a pressure leach process, subjecting pressure leach process discharge to a solid-liquid separation process to produce a discharge liquid stream and a discharge solids stream, and subjecting the discharge liquid stream to a solvent extraction and a base strip process.

US Patent:

20130001093, Jan 3, 2013

Filed:

Sep 5, 2012

Appl. No.:

13/604428

Inventors:

John O. Marsden - Paradise Valley AZ, US
James D. Gillaspie - Gilbert AZ, US
John C. Wilmot - Anthem AZ, US

Assignee:

FREEPORT-MCMORAN CORPORATION - Phoenix AZ

International Classification:

C25C 1/06
C25C 1/12
C25D 3/38

US Classification:

205261, 205593, 205580

Abstract:

The present invention relates, generally, to a method and apparatus for recovering metal values from a metal-bearing materials, and more specifically, a process for recovering copper and other metals through leaching, electrowinning using the ferrous/ferric anode reaction, and the synergistic addition of ferrous iron to the leach step.