2. Thermodynamic aspects

Developing the mineral skeleton of the electrolyte requires a well-established procedure. The method consists of successively dissolving potassium cyanide in a dilute potash solution (≈ 5 to 10 g.L ^-1 ), then adding copper cyanide in a substoichiometric quantity compared to potassium cyanide. Under these conditions, the copper in the mother phase is solubilized in the form of complexes of generic formula :

\begin{array}{l} {[Cu {(CN)}_{n + 1}]}^{n -} \end{array}

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Bibliography

(1) - HORNER (J.) - Cyanide Copper Plating. - Plating and Surface Finishing, vol. 89, n° 8, p. 28-30 (2001).
(2) - HOLT (D.A.) - Brevet d'invention 2255057, Dupont de Nemours (1941).
(3)...

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