Maryam Osali, Farid Ahani
Limonitic laterites typically contain low Ni and Co contents and significant impurities, making the development of technical and economically feasible processes challenging. To address this challenge, this study investigates and evaluates an integrated hydrometallurgical process comprising sulfation roasting, water leaching, and solvent extraction (SX) for the selective recovery of Ni and Co from limonite-type laterite. Response Surface Methodology coupled with a Central Composite Design (RSM-CCD) was employed as a statistical experimental design tool to efficiently optimize the sulfation roasting conditions. Under the optimal sulfation roasting conditions (temperature 703 ◦C), selective leaching efficiencies of 87.2% for Ni and 96.6% for Co were achieved, with only 3.8% Fe co-leaching. A multi-stage SX scheme was subsequently applied to purify the pregnant leach solution (PLS) of water leaching.
@article{1d9e19f0-939a-4136-8116-bfe41565bb48,
title={Selective Extraction of Nickel and Cobalt from Limonitic Laterite via Optimized Sulfation Roasting–Water Leaching and Solvent Extraction},
author={Maryam Osali and Farid Ahani},
year={2026},
language={en}
}TY - JOUR TI - Selective Extraction of Nickel and Cobalt from Limonitic Laterite via Optimized Sulfation Roasting–Water Leaching and Solvent Extraction AU - Maryam Osali AU - Farid Ahani PY - 2026 LA - en ER -
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