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Selective leaching of a mixed nickel-cobalt hydroxide precipitate in sulphuric acid solution with potassium permanganate as oxidant

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info:eu-repo/semantics/closedAccess

Date

01.10.2020

Author

Hussaini, Shokrullah
Ichlas, Zela Tanlega
Top, Soner
Kursunoglu, Sait
Kaya, Muammer

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Abstract

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.

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SEPARATION SCIENCE AND TECHNOLOGY

URI

https://doi.org/10.1080/01496395.2020.1832523
https://hdl.handle.net/20.500.12573/486

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  • Malzeme Bilimi ve Nanoteknoloji Mühendisliği Bölümü Koleksiyonu [81]



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