Hussaini, ShokrullahIchlas, Zela TanlegaTop, SonerKursunoglu, SaitKaya, Muammer2021-01-262021-01-2620200149-63951520-5754https://doi.org/10.1080/01496395.2020.1832523https://hdl.handle.net/20.500.12573/486This work was supported by The Scientific and Technological Research Council of Turkey (TUBITAK) [Project No: 216M405].Selective leaching of a mixed nickel-cobalt hydroxide precipitate was investigated using potassium permanganate as oxidant in sulfuric acid solution. 94.9% Ni, 50% Co and 0.6% Mn were dissolved under the following conditions: sulfuric acid concentration of 0.75 M, potassium permanganate of 5 g/L, temperature of 30 degrees C, leaching duration of 60 min, solid-to-liquid ratio of 1/10, and stirring speed of 400rpm. The pregnant leach solution was subjected to a solvent extraction process. 98% Co and 99% Mn were extracted at pH 4.84 with 30% (v/v) Cyanex 272, leaving essentially all nickel in the raffinate. Based on the experimental results, a flowsheet is proposed.enginfo:eu-repo/semantics/closedAccessnickelsolvent extractionmixed nickel-cobalt hydroxide precipitatepotassium permanganateSelective leachingarticle