Wayne Colby Hazen
Engineers at Eaton St, Denver, CO

6497745, Dec 24, 2002

Jul 25, 2001

09/912945

John O. Marsden - Phoenix AZ
Robert E. Brewer - Safford AZ
Joanna M. Robertson - Thatcher AZ
Wayne W. Hazen - Lakewood CO
Philip Thompson - West Valley City UT
David R. Baughman - Golden CO

Phelps Dodge Corporation - Phoenix AZ

C22B 308

75743, 75744, 423 27, 4236585

The present invention relates generally to a process for the production of sulfuric acid and liberation of precious metal values from materials containing sulfur through pressure leaching operations. In accordance with various aspects of the present invention, the sulfur-bearing materials may comprise residues from pressure leaching operations, such as those carried out at medium temperatures. The process of the present invention can be advantageously used to convert such sulfur-bearing materials to sulfuric acid by means of pressure leaching. The sulfuric acid so produced can be used beneficially in other mineral processing operations, for example those at the site where it is produced. Metals, such as precious metals, that are contained within the sulfur-bearing materials advantageously may be recovered from processing products by established precious metals recovery technology.

8420048, Apr 16, 2013

Dec 20, 2011

13/331699

Anand Raman - Phoenix AZ, US
Jason M. Morgan - Morenci AZ, US
Barbara J Savage - Silver City NM, US
David G Meadows - Phoenix AZ, US
Wayne W Hazen - Lakewood CO, US

Freeport-McMoran Corporation - Phoenix AZ

C21B 15/00

4236585, 423 24

The present disclosure relates to a process and system for recovery of one or more metal values using solution extraction techniques and to a system for metal value recovery. In an exemplary embodiment, the solution extraction system comprises a first solution extraction circuit and a second solution extraction circuit. A first metal-bearing solution is provided to the first and second circuit, and a second metal-bearing solution is provided to the first circuit. The first circuit produces a first rich electrolyte solution, which can be forwarded to primary metal value recovery, and a low-grade raffinate, which is forwarded to secondary metal value recovery. The second circuit produces a second rich electrolyte solution, which is also forwarded to primary metal value recovery. The first and second solution extraction circuits have independent organic phases and each circuit can operate independently of the other circuit.

7722756, May 25, 2010

Nov 19, 2008

12/274035

John O Marsden - Phoenix AZ, US
Joanna M Robertson - Thatcher AZ, US
Robert E Brewer - Park City UT, US
David R Baughman - Golden CO, US
Philip Thompson - West Valley UT, US
Wayne W Hazen - Lakewood CO, US
Christel M. A. Bemelmans - Indian Hills CO, US

Freeport-McMoran Corporation - Phoenix AZ

C25C 1/12

205580, 205574, 205581, 205584, 205585, 205586, 74740, 74743

A system and process for recovering copper from a copper-containing ore, concentrate, or other copper-bearing material to produce high quality cathode copper from a leach solution without the use of copper solvent/solution extraction techniques or apparatus. A process for recovering copper from a copper-containing ore generally includes the steps of providing a feed stream containing comminuted copper-containing ore, concentrate, or other copper-bearing material, leaching the feed stream to yield a copper-containing solution, conditioning the copper-containing solution through one or more physical or chemical conditioning steps, and electrowinning copper directly from the copper-containing solution in multiple electrowinning stages, without subjecting the copper-containing solution to solvent/solution extraction prior to electrowinning.

2011001, Jan 20, 2011

Sep 27, 2010

12/891508

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

FREEPORT-MCMORAN CORPORATION - Phoenix AZ

C01G 39/02

423 54

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.

5660735, Aug 26, 1997

Jul 15, 1996

8/683530

Enzo Coltrinari - Golden CO
Wayne C. Hazen - Denver CO

Hazen Research, Inc. - Golden CO

C02F 162

210723

The present invention is a method to remove metals from solutions by precipitating the metals and adding cellulosic fiber to the solution. The precipitates attach to the cellulosic fibers to form products. The products may be removed from the solution by gravity separation techniques or by filtration. The removed products may be dewatered and incinerated. The method provides a simple and effective technique for removing low concentrations of metals from high volume solution streams.

6013382, Jan 11, 2000

May 27, 1997

8/863672

Enzo L. Coltrinari - Golden CO
Jerome P. Downey - Parker CO
Wayne C. Hazen - Denver CO
Paul B. Queneau - Golden CO

Technology Management Advisors LLC - Englewood CO

B32B 1520

428675

A copper alloy plumbing fixture containing interdispersed lead particles coated non-continuously on a water contact surface to resist the leaching of lead into potable water systems. The leach resistant fixture is prepared by immersing conventional copper alloys in a bismuth nitrate solution, selectively and non-continuously coating the lead dispersoid particles on the water contact surface with bismuth, tin or copper.

2008021, Sep 11, 2008

Mar 10, 2008

12/045619

John O. Marsden - Phoenix AZ, US
Robert E. Brewer - Safford AZ, US
Joanna M. Robertson - Thatcher AZ, US
Wayne W. Hazen - Lakewood CO, US
Philip Thompson - West Valley City UT, US
David R. Baughman - Golden CO, US
Roland Schmidt - Golden CO, US

PHELPS DODGE CORPORATION - Phoenix AZ

C22B 3/04, C22B 15/00

75743, 266101

The present invention relates generally to a process for recovering copper and other metal values from metal-containing materials using controlled, super-fine grinding and medium temperature pressure leaching. Processes embodying aspects of the present invention may be beneficial for recovering a variety of metals such as copper, gold, silver, nickel, cobalt, molybdenum, rhenium, zinc, uranium, and platinum group metals, from metal-bearing materials, and find particular utility in connection with the extraction of copper from copper sulfide ores and concentrates.

5544859, Aug 13, 1996

Jun 3, 1994

8/253746

Enzo L. Coltrinari - Golden CO
Jerome P. Downey - Parker CO
Wayne C. Hazen - Denver CO
Paul B. Queneau - Golden CO

Hazen Research, Inc. - Golden CO

F16K 3100

251368

A copper alloy plumbing fixture containing interdispersed lead particles coated noncontinuously on a water contact surface to resist the leaching of lead into potable water systems. The leach resistant fixture is prepared by immersing conventional copper alloys in a bismuth nitrate solution, selectively and noncontinuously coating the lead dispersoid particles on the water contact surface with bismuth. Tin may be substituted for bismuth to obtain similar results.

6284005, Sep 4, 2001

Jan 28, 1999

9/239441

Wayne C. Hazen - Denver CO
Dale Lee Denham - Arvada CO
Rudolph Pruszko - Green River WY
David R. Baughman - Golden CO
Ralph B. Tacoma - Evanston WY

Environmental Projects, Inc. - Casper WY

C01D 1508

23302T

The present invention provides a process for producing sodium carbonate monohydrate crystals by introduction of anhydrous sodium carbonate into a saturated sodium carbonate brine solution under conditions in which sodium carbonate monohydrate formation is favored. As the anhydrous sodium carbonate dissolves, the brine becomes supersaturated resulting in relief of supersaturation by formation of sodium carbonate monohydrate crystals. The process includes controlling supersaturation and its relief to achieve growth of existing sodium carbonate monohydrate crystals rather than nucleation and formation of new sodium carbonate monohydrate crystals. The resulting crystals are separated from insoluble impurities on a size separation basis.

8372361, Feb 12, 2013

Nov 22, 2011

13/302369

Barbara J. Savage - Silver City NM, US
David G. Meadows - Phoenix AZ, US
Wayne W. Hazen - Lakewood CO, US

Freeport-McMoran Corporation - Phoenix AZ

C21B 15/00

423 24, 423 8, 423 215, 423 22, 423 49, 423 54, 423 99, 423139, 75722

The present invention relates generally to a process for controlled leaching and sequential recovery of two or more metals from metal-bearing materials. In one exemplary embodiment, recovery of metals from a leached metal-bearing material is controlled and improved by providing a high grade pregnant leach solution (“HGPLS”) and a low grade pregnant leach solution (“LGPLS”) to a single solution extraction plant comprising at least two solution extractor units, at least two stripping units, and, optionally, at least one wash stage.