Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group ib metal
Patent
1993-01-26
1994-07-12
Killos, Paul J.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group ib metal
423 33, 423 23, 423 27, 423 30, 423 34, C01G 314
Patent
active
053286693
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.
REFERENCES:
patent: 3709681 (1973-01-01), Wilson et al.
patent: 3775099 (1973-11-01), Coffield et al.
patent: 3778252 (1973-12-01), Wilson
patent: 3826750 (1974-07-01), Wilson
patent: 3957505 (1976-05-01), Homick et al.
patent: 3988415 (1976-10-01), Barr
patent: 4070182 (1978-01-01), Genik-Sas-Berezowsky et al.
patent: 4093698 (1978-06-01), Cardwell
patent: 4137291 (1979-01-01), Cardwell et al.
patent: 4146572 (1979-03-01), Cardwell et al.
patent: 4269622 (1981-05-01), Kerley, Jr.
patent: 4319923 (1982-03-01), Falanga et al.
patent: 4369061 (1983-01-01), Kerley, Jr.
patent: 4375984 (1983-03-01), Bahl et al.
patent: 4557759 (1985-12-01), McGrew et al.
patent: 4654078 (1987-03-01), Perez et al.
patent: 4684404 (1987-08-01), Kalocsai
patent: 4980134 (1990-12-01), Butler
patent: 5114687 (1992-05-01), Han
patent: 5139752 (1992-08-01), Nakao et al.
A. B. Abdullaev et al., "Autoclave Leaching of Auriferous Sulifide Ore", Tsvetnyemetally/Non-Ferrous Metals, pp. 91-92, Jun. 1975.
K. Tozawa et al., "Dissolution of Gold in Ammonical Thiosulfate Solution", 1971.
Groenewald T., "The Dissolution of Gold in Acidic Solutions of Thiourea," Hydrometallurgy, vol. 1 (1977) 277-290.
Schulze, R. G., "New Aspects in Thiourea Leaching Precious Metals," Journal of Metals, Jun. (1984) 62-65.
Hiskey, J. B. and Atluri, V. P., "Dissolution Chemistry of Gold and Silver in Different Lixivants," Mineral Processing and Extractive Metallurgy Review, vol. 4 (1988) 95-134.
Kerley, B. J., "Recovery of Precious Metals from; Difficult Ores," U.S. Pat. No. 4,269,622 (1981).
Scheiner, B. J., "Processing of Refractory Carbonaceous Ores for Gold Recovery," Journal of Metals, vol. 23, No. 3 (1971) 37-40.
Han, K. N. and Vu, C., "Leaching Behavior of Cobalt in Ammonia Solutions," Trans. IMM Sec. C, vol. 86 (1977) C119-125.
Han, K. N., Bhuntumkomol K. and Lawson, F., "Leaching Behavior of Metallic Nickel in Ammonia Solutions," Trans. IMM. Sec. C, vol. 89 (1980) C7-13.
Han, K. N., Vu, C. and Lawson, F., "Leaching Behavior of Cobaltous Cobalto-Cobaltic Oxides in Ammonia and in Acid Solutions," Hydrometallurgy., vol. 6 (1980) 75-87.
Han, K. N. and Bhuntumkomol, K., "Kinetics of Leaching Metallic Nickel Powder in Ammoniacal Solutions," Trans. IMM. Sec. C., vol. 91 (1982) C1-4.
Han, K. N. Nebo, C. O. and Ahmad, W., "The Leaching Kinetics of Cobalt and Nickel from Aluminum-Coprecipitated Products," Met. Trans. B 18B (1987) 635-640.
Skibsted, L. H. and Bjerrum, J., "Gold Complexes I, Robustness, Stability and Acid Dissolution of the Tetramminegold (III) ion," Acta. Chemica Scan-divica, vol. A28, No. 7 (1974) 740-746.
Skibsted, L. H. and Bjerrum, J., "Gold Complexes II, Equilibrium between Gold (I) and Gold (III) in the Ammonia System and the Standard Potentials of the Couples Involving Gold Diamminegold (I) and Tetramminegold (IV)," Acta. Chemica Scandivica, vol. A28, No. 7 (1974) 760-770.
Meng Xinghui, "E-pH Diagrams and Thermodynamic Analysis of the Au-NH.sub.3 -H.sub.2 O System", Engineering Chemistry & Metalurgy, vol. 9, No. 3 (1988), pp. 56-60.
K. Bhuntumkomol, K. N. Han et al., "The Leaching Behavior of Nickel Oxides in Acid and in Ammonical Solutions", Hydrometallurgy, vol. 8 (1982), 147-160.
Han Kenneth N.
Meng Xinghui
Killos Paul J.
Presta Frank P.
South Dakota School of Mines and Technology
LandOfFree
Extraction of precious metals from ores and other precious metal does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Extraction of precious metals from ores and other precious metal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Extraction of precious metals from ores and other precious metal will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-394463