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Direct Copper Precipitation from a Loaded Chelating Extractant by Pressure Hydrogen Stripping

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Abstract

The kinetics of direct copper precipitation from a loaded chelating extractant (Kelex 100) using hydrogen in an autoclave (pressure hydrogen stripping) was studied. Copper, in powder form, was found to precipitate rapidly from loaded Kelex 100/decanol/kerosene solvents by reaction with hydrogen at pressures between 520 and 4000 kPa and temperatures from 443 to 488 K. The overall process has heterogeneous nucleation characteristics. Nuclei are provided through slow thermal dissociation of the copper chelate. The freshly produced metallic copper, acting autocatalytically, accelerates the precipitation kinetics. In addition to temperature and pressure, the effects of seeding, agitation, copper concentration, ligand concentration, and copper chelate age were investigated. Some physical and chemical properties of the powder product were also determined.

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Authors and Affiliations

  1. Department of Mining and Metallurgical Engineering, McGill University, Montreal, PQ, Canada

    G. P. Demopoulos (N.S.E.R.C. Assistant Professor) & P. A. Distin (Associate Professor)

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  1. G. P. Demopoulos
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  2. P. A. Distin
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Demopoulos, G.P., Distin, P.A. Direct Copper Precipitation from a Loaded Chelating Extractant by Pressure Hydrogen Stripping. Metall Trans B 16, 13–22 (1985). https://doi.org/10.1007/BF02657483

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