Abstract
Development of a complete hydrometallurgical process at the laboratory scale for recovering copper from the copper electroplating second rinse bath solution containing ~ 2.5 g/L copper (CESRBS) by solvent extraction route using LIX 984N-C dissolved in commercial kerosene was investigated. By using LIX 984N-C, an electrolyte from CESRBS with ~ 97 g/L copper content, which was addable to the copper electroplating bath, was generated by 30 vol.% LIX 984N-C in commercial kerosene at the O/A ratio of 1/8 and equilibrium pH value of 2 with two-stage counter-current extraction, and stripping of loaded organic by copper electroplating first rinse bath solution (7.8 g/L Cu) with 550 g/L sulfuric acid addition and with the O/A ratio of 2 at two-stage counter-current stripping process. The copper in stripping solution precipitated as CuSO 4 3H 2O salt. If the copper sulfate is produced without contaminated with organic phase, it could be recycled to the copper electroplating bath. A complete flow sheet of 30 vol.% LIX 984N-C process for the recovery of copper from CESRBS was demonstrated.
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