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Gold leaching

Another hydrometaHurgical use of Caro s acid is for destroying cyanide effluents from gold-leaching. It is more useful than catalyzed hydrogen peroxide for this duty because it also destroys thiocyanate ion. This appHcation has been demonstrated ia the laboratory (66) and at two gold mines (66,67). [Pg.95]

From the thermodynamic behavior of metals pertinent to gold leaching in cyanide solutions it may be observed that Au(CN) shows a large region of stability over the whole pH range, whilst metallic gold, which is usually stable in aqueous solutions under all condi-... [Pg.563]

A. R. Udupa, S. K. Kawatra and M. S. Prasad, Developments in Gold Leaching, A Literature Survey, Mineral Processing and Extractive Metallurgy Review, Vol. 7, p. 115,1990. [Pg.576]

The development of more benign alternatives to cyanide for gold-leaching (see Section 9.17.3.1) such as thiourea, thiocyanate, or thiosulfate, which form stable complexes in water has prompted research to identify suitable solvent extractants from these media. Cyanex 301, 302, 272, Ionquest 801, LIX 26, MEHPA, DEHPA, Alamine 300 (Table 5) have been evaluated as extractants for gold or silver from acidic thiourea solutions.347 Whilst the efficacy of Cyanex 301 and 302 was unaffected by the presence of thiourea in the aqueous feed, the loading of the other extractants is severely depressed. Formation of solvated complexes of gold and of an inner-sphere complex of silver has been proposed.347... [Pg.792]

Breuer, P. L. Jeffrey, M. I. Copper catalysed oxidation of thiosulfate by oxygen in gold leach solutions. Miner. Eng. 2003, 16, 21-30. [Pg.798]

Gong, Q. Hu, J. Cao, C. Kinetics of gold leaching from sulfide gold concentrates with thiosulfate solution. Trans. Nonferrous Met. Soc. China 1993, 3, 30-36. [Pg.799]

Ubaldini, S. Fornari, P. Massidda, R. Abbruzzese, C. An innovative thiourea gold leaching process. Hydrometallurgy 1998, 48, 113-124. [Pg.799]

Orgul, S. Atalay, U. Reaction chemistry of gold leaching in thiourea solution for a Turkish gold ore. Hydrometallurgy 2002, 67, 71-77. [Pg.799]

Senanayake, G. (2012). Gold leaching by copper(II) in ammoniacal thiosulphate solutions in the presence of additives. Part I A review of the effect of hard-soft and Lewis acid-base properties and interactions of ions. Hydrometallurgy, 115-116, 1-20. doi 10.1016/j. hydromet.2011.11.011... [Pg.10]

GOLD LEACHING IN ORGANIC SOLVENTS SIMPLE AND MILDE REACTION CONDITIONS FOR FAST GOLD DISSOLUTION... [Pg.1]

Gold leaching, Acidified organic solvents. Dissolution rate, Non-aqueous leaching... [Pg.1]

Table 1- Gold leaching in different water-miscible organic solvents containing IM HCl and 0.1 M H2O2... Table 1- Gold leaching in different water-miscible organic solvents containing IM HCl and 0.1 M H2O2...
Senanayake, G. (2004a). Gold leaching in non-cyanide hxiviant systems critical issues on fundamentals and... [Pg.5]

A hopeful sign is that DuPont scientists have been able to considerably reduce the amount of sodium cyanide and the reaction time required in the gold leaching process, by using a few parts per million of the imidazole activator that dramatically boosts the recovery rates. [Pg.11]

Gold Leaching, Thiosulfate Leaching, Organic Additive, nieso-2,3-dimcrcaptosuccinic acid, DMSA... [Pg.1]

Figure 3 -Percent of gold leached from a calcined ore in a solution composed of lOOmM CaS203 + 0.5mM CuS04 at pH 8.5 and 50°C. The leach solution also contained OpM DMSA (blue bars - single trial)and 5 pM DMSA (red bars - two trials). Error bars represent thestandarddeviation across 2 independent runs. Figure 3 -Percent of gold leached from a calcined ore in a solution composed of lOOmM CaS203 + 0.5mM CuS04 at pH 8.5 and 50°C. The leach solution also contained OpM DMSA (blue bars - single trial)and 5 pM DMSA (red bars - two trials). Error bars represent thestandarddeviation across 2 independent runs.
Baron, J.Y., Szymanski, G., Lipkowski, J. (2011).Electrochemical methods to measure gold leaching current in an alkaline thiosulfate solution.Journal of Electroanalytical Chemistry, 662(1), 57-63. doi doi 10.1016/j.jelechem.2011.03.001... [Pg.9]

Nicol, E. A., Baron, J. Y., Mirza, J., Leitch, J. J., Choi, Y., Lipkowski, J. (2014). Surface-enhanced Raman spectroscopy studies of the passive layer formation in gold leaching from thiosulfate solutions in the presence of cupric ion. Journal of Solid State Electrochemistry, 18(5), 1469-1484. doi 10.1007/sl0008-013-2320-z... [Pg.11]

See other pages where Gold leaching is mentioned: [Pg.268]    [Pg.171]    [Pg.416]    [Pg.765]    [Pg.758]    [Pg.268]    [Pg.1]    [Pg.2]    [Pg.2]    [Pg.3]    [Pg.3]    [Pg.4]    [Pg.4]    [Pg.1]    [Pg.2]    [Pg.7]    [Pg.8]    [Pg.10]    [Pg.11]    [Pg.11]    [Pg.2]    [Pg.3]    [Pg.4]    [Pg.5]    [Pg.6]    [Pg.7]    [Pg.8]    [Pg.8]    [Pg.3224]   
See also in sourсe #XX -- [ Pg.147 ]

See also in sourсe #XX -- [ Pg.147 ]



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