Hussaini, ShokrullahIchlas, Zela TanlegaTop, SonerKursunoglu, SaitKaya, Muammer2025-09-252025-09-2520210149-63951520-5754https://doi.org/10.1080/01496395.2020.1832523https://hdl.handle.net/20.500.12573/4613Hussaini, Shokrullah/0000-0003-0287-0061; Kaya, Muammer/0000-0001-5260-2589; Top, Soner/0000-0003-3486-4184; Kursunoglu, Sait/0000-0002-1680-5482; Ichlas, Zela/0000-0003-2550-5948;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.eninfo:eu-repo/semantics/closedAccessSelective LeachingPotassium PermanganateMixed Nickel-Cobalt Hydroxide PrecipitateSolvent ExtractionNickelArticle10.1080/01496395.2020.18325232-s2.0-85092276705