Kinetics of stripping of N-8-quinolyl-p-dodecylbenzenesulfonamide-copper chelate complex with hydrochloric acid.

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A kinetic study concerning the stripping of copper chelate complex in toluene with hydrochloric acid was carried out at 303 K, using a stirred transfer cell and pure copper complex prepared from copper and synthesized N-8-quinolyl-p-dodecylbenzenesulfonamide.<br> It was found that the mechanism of copper stripping could not be explained as simply a reverse process of the copper extraction by this extractant from acetate buffer media, due to the reaction between the extractant and hydrochloric acid and the low solubility of the ion pair complex formed by this reaction. Moreover, it was confirmed that the stripping rate was determined by the first step of the interfacial reaction between the copper complex and the acid, and by mass transfer of the copper complex.

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