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Xinghui Meng, 66211 Hemford Cir, Sacramento, CA 95832

Xinghui Meng Phones & Addresses

211 Hemford Cir, Sacramento, CA 95832    916-6659657   

2693 Stonecreek Dr, Sacramento, CA 95833    916-6411623   

511 Rochelle Rd, Irving, TX 75062    972-2525189   

4142 Cedar Ct, Grapevine, TX 76051    817-3541037    817-3549574    972-2520597   

Rapid City, SD   

Garland, TX   

211 Hemford Cir, Sacramento, CA 95832    817-6143262   

Work

Position: Professional/Technical

Education

Degree: High school graduate or higher

Mentions for Xinghui Meng

Publications & IP owners

Us Patents

Recovery Of Copper From Its Sulfides And Other Sources Using Halogen Reagents And Oxidants

US Patent:
5989311, Nov 23, 1999
Filed:
Jul 28, 1997
Appl. No.:
8/901451
Inventors:
Kenneth N. Han - Rapid City SD
Xinghui Meng - Rapid City SD
Assignee:
South Dakota School of Mines and Technology - Radid City SD
International Classification:
C21B 1500
C01G 5500
B01D51100
H01M 650
US Classification:
75743
Abstract:
Copper and nickel are extracted from their elemental state, complex sulfides, ores, and other materials such as scrap by leaching them with a solution containing halogen salts: bromine/bromide, or iodide/iodine, oxygen and sodium or potassium nitrate. The invented process is particularly effective for chalcopyrite and pentlandite in an autoclave at a temperature of 100. degree. C. -150. degree. C.

Extraction Of Precious Metals From Ores And Other Precious Metal Containing Materials Using Halogen Salts

US Patent:
5328669, Jul 12, 1994
Filed:
Jan 26, 1993
Appl. No.:
8/009177
Inventors:
Kenneth N. Han - Rapid City SD
Xinghui Meng - Rapid City SD
Assignee:
South Dakota School of Mines and Technology - Rapid City SD
International Classification:
C01G 314
US Classification:
423 32
Abstract:
Platinum group metals, gold and silver are extracted from complex ores, automobile scrap, refractory ores and as naturally occurring by leaching the precious metal containing materials with a solution containing halogen salts such as potassium or sodium iodide and bromide in the presence of ammonium ions and oxygen. The precious metal containing materials and reactants are charged into a reaction zone held at high temperatures and pressures to form a slurry containing a precious metal ion solution. The precious metal ion solution is separated from the slurry and subjected to recovering techniques to recover the precious metals.

Ammonia Extraction Of Gold And Silver From Ores And Other Materials

US Patent:
5308381, May 3, 1994
Filed:
Apr 15, 1993
Appl. No.:
8/046311
Inventors:
Kenneth N. Han - Rapid City SD
Xinghui Meng - Rapid City SD
Assignee:
South Dakota School of Mines & Techology - Rapid City SD
International Classification:
C01G 314
US Classification:
75744
Abstract:
Gold and silver are extracted from their elemental state or from complex ores and alloys by leaching them with a solution containing ammonia, ammonium salts and one or more oxidants. The process is particularly effective for refractory gold ores including sulfide and carbonaceous ores.

Recovery Of Platinum Group Metals And Rhenium From Materials Using Halogen Reagents

US Patent:
5542957, Aug 6, 1996
Filed:
Jan 27, 1995
Appl. No.:
8/379809
Inventors:
Kenneth N. Han - Rapid City SD
Xinghui Meng - Rapid City SD
Assignee:
South Dakota School of Mines and Technology - Rapid City SD
International Classification:
C22B 346
US Classification:
75732
Abstract:
Platinum group metals and rhenium are extracted from their elemental state, complex ores, and other materials such as catalysts by leaching them with a solution containing ammonium halogen salts--iodide and bromide in the presence oxygen and/or sulfuric acid. The invented process is particularly effective for spent catalysts containing precious metals and rhenium in an autoclave at a temperature of 50. degree. C. -300. degree. C.

Ammonia Extraction Of Gold And Silver From Ores And Other Materials

US Patent:
5114687, May 19, 1992
Filed:
Dec 14, 1990
Appl. No.:
7/627502
Inventors:
Kenneth N. Han - Rapid City SD
Xinghui Meng - Rapid City SD
Assignee:
South Dakota School of Mines & Technology - Rapid City SD
International Classification:
C01G 314
US Classification:
423 32
Abstract:
Gold and silver are extracted from their elemental state or from complex ores and alloys by leaching them with a solution containing ammonia, ammonium salts and one or more oxidants. The process is particularly effective for refractory gold ores including sulfide and carbonaceous ores.

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