Electrochemistry of the chalcocite-xanthate system.
O'Dell-CS; Walker-GW; Richardson-PE
J Appl Electrochem 1986 Jan; 16(4):544-554
This paper describes the interactions between chalcocite and ethylxanthate when examined in an electrochemical-microflotation cell containing a particle-bed working electrode. Cyclic voltammetry has shown the formation of a chemisorbed product commencing at -0.5V versus saturated calomel electrode, with a bulk oxidation product, possibly cuprous xanthate, forming above -0.23. Relating the charge passed on a potentiostated mineral bed after addition of xanthate to spectrophotometric changes in xanthate concentration suggested the presence of a fast chemical reaction and a charge transfer reaction. The strong correlation between flotation response and potential indicates that chemisorption of ethylxanthate produces a layer sufficiently hydrophobic for chalcocite flotation.
OP; Journal Article
Journal of Applied Electrochemistry