Ignacio Castillo, Mauricio Mura
Rhenium is one of the rarest and most strategically important metals, indispensable in high-temperature superalloys and platinum–rhenium catalysts used across the aerospace and petrochemical industries. Owing to its limited primary reserves, recovering rhenium from secondary sources, such as spent catalysts, superalloy residues, and metallurgical dusts, has become vital to ensuring supply security. This review examines technological developments between 1998 and 2025, focusing on how operational parameters, including temperature, leaching time, reagent concentration, and solid-to-liquid ratio, govern dissolution kinetics and overall process efficiency. Comparative evaluation of hydrometallurgical, alkaline, and hybrid processes indicates that modern systems can achieve recovery rates exceeding 98% through selective oxidation, alkaline activation, or combined pyro and hydrometallurgical mechanisms.
@article{2fe63044-f2ea-47ca-89a5-38ec7200bb41,
title={Leaching of Rhenium from Secondary Resources: A Review of Advances, Challenges, and Process Optimisation},
author={Ignacio Castillo and Mauricio Mura},
year={2026},
language={es}
}TY - JOUR TI - Leaching of Rhenium from Secondary Resources: A Review of Advances, Challenges, and Process Optimisation AU - Ignacio Castillo AU - Mauricio Mura PY - 2026 LA - es ER -
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