Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Reexamination Certificate
2011-05-24
2011-05-24
Wyszomierski, George (Department: 1733)
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
C075S744000, C423S027000
Reexamination Certificate
active
07947108
ABSTRACT:
Mineral materials comprising copper and precious metal are subjected to an acidic leach of the copper followed by an acidic thiocyanate leach of the precious metal.
REFERENCES:
patent: 3403020 (1968-09-01), Lower
patent: 3545964 (1970-12-01), Hansen et al.
patent: 3793429 (1974-02-01), Queneau et al.
patent: 4608176 (1986-08-01), Fleming
patent: 4764353 (1988-08-01), Babjak et al.
patent: 4913730 (1990-04-01), Deschenes et al.
patent: 5061459 (1991-10-01), Bennett et al.
patent: 5071477 (1991-12-01), Thomas et al.
patent: 5093091 (1992-03-01), Dauplaise et al.
patent: 5127942 (1992-07-01), Brierley et al.
patent: 5147617 (1992-09-01), Touro et al.
patent: 5158603 (1992-10-01), Stierman et al.
patent: 5223023 (1993-06-01), Awadalla et al.
patent: 5244493 (1993-09-01), Brierley et al.
patent: 5246486 (1993-09-01), Brierley et al.
patent: 5260040 (1993-11-01), Kenna
patent: 5332559 (1994-07-01), Brierley et al.
patent: 5458866 (1995-10-01), Simmons
patent: 5536480 (1996-07-01), Simmons
patent: 5698170 (1997-12-01), King
patent: 5834294 (1998-11-01), Brierley et al.
patent: 5851499 (1998-12-01), Gathje et al.
patent: 5885327 (1999-03-01), Virnig
patent: 5914441 (1999-06-01), Hunter et al.
patent: 6344068 (2002-02-01), Fleming et al.
patent: 6355175 (2002-03-01), Green et al.
patent: 6379919 (2002-04-01), Carter
patent: 6395063 (2002-05-01), Cole
patent: 6641642 (2003-11-01), Simmons et al.
patent: 6660059 (2003-12-01), Ji et al.
patent: 7285256 (2007-10-01), Wan et al.
patent: 7537640 (2009-05-01), Wan et al.
patent: 7559973 (2009-07-01), Wan et al.
patent: 2002/0092377 (2002-07-01), Ji et al.
patent: 2013537 (1991-09-01), None
patent: 2 180 829 (1987-04-01), None
patent: 2070588 (1996-12-01), None
patent: 2081193 (1997-06-01), None
patent: 91/11539 (1991-08-01), None
patent: 03/010345 (2003-02-01), None
patent: 2004/046036 (2004-06-01), None
Barbosa-Filho, O et al. Thermochemistry of thiocyanate systems for leaching gold and silver ores. Precious Metals '89. TMS, 1988. pp. 307-339.
Barbosa-Filho, O et al. Leaching of gold in thiocyanate solutions—Part 1: Chemistry and thermodynamics. Transactions of the Institute of Mining and Metallurgy (Section C). 1994. vol. 103. pp. C105-C110.
Barbosa-Filho, O et al. Leaching of gold in thiocyanate solutions—Part 2: Redox processes in iron (III)—thiocyanate solutions. Transactions of the Institute of Mining and Metallurgy (Section C). 1994. vol. 103. pp. C111-C116.
Barbosa-Filho, O et al. Leaching of gold in thiocyanate solutions—Part 3: Rates and mechanism of gold dissolution. Transactions of the Institute of Mining and Metallurgy (Section C). 1994. vol. 103. pp. C117-C125.
Botz, M et al. Technologies for the regeneration of cyanide from thiocyanate. SME Annual Meeting. Feb. 28-Mar. 1, 2000. Salt Lake City, Utah. pp. 1-10.
Broadhurst, JL et al. A thermodynamic study of the dissolution of gold in an acidic aqueous thiocyanate medium using iron (III) sulfate as an oxidant. Hydrometallurgy. 1993. vol. 32. pp. 317-344.
Kholmogorov, A.G. et al. Thiocyanate solutions in gold technology. Hydrometallurgy. 2002. vol. 64. pp. 43-48.
Laskorin, BI et al. Autoclave Oxidation of Sulfide-Arsenious Gold-Bearing Concentrates. Gold Hydrometallurgy. USSR Academy of Sciences. “Nauka” Publisher. 1980. pp. 52-53.
Munoz, GA et al. Noncyanide leaching of an auriferous pyrite ore from Ecuador. Minerals and Metallurgical Processing. 2000. vol. 17, No. 3. pp. 198-204.
Meretukov, MA and Orlov AM. Metallurgy of Precious Metals Foreign Experience. Moscow “Metallurgy” Publisher. 1991. pp. 242-245.
Monhemius et al. Leaching of Dominican gold ores in iodide-catalysed thiocyanate solutions. Transactions of the Institute of Mining and Metallurgy (Section C). 1995. vol. 104, pp. C117-124.
LeVier K. Marc
Wan Rong Yu
Marsh & Fischmann & Breyfogle LLP
McGuthry-Banks Tima M
Newmont USA Limited
Wyszomierski George
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