The chemistry and kinetics of oxidized copper sulfiding by sodium thiosulfate

P. N. Naguman

2008

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DOI 10.3103/s1067821208060011
Data confidence 70 medium
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Abstract

The conditions of copper sulfide formation as a result of the interaction between sodium thiosulfate and oxidized compounds of copper are studied. The effects of precipitator consumption, acidity, and temperature on this process are studied. It is found that copper can be quantitatively extracted from solutions by sodium thiosulfate in the form of covelline and chalcosine. The kinetics of the interaction between sodium thiosulfate and oxidized copper minerals in the temperature range from 40 to 100°C with 1.5 mol of Na 2 S 2 O 3 per 1 mol of the metal extracted are studied. Equations describing typical kinetic curves of precipitation are selected. The reaction rate constants are determined.