Utilization of amino acid for selective leaching of critical metals from spent hydrodesulfurization catalyst.

ABSTRACT: While spent catalysts can cause serious environmental pollution, they can be considered an essential secondary metal source due to their high critical metal grades. The formation of the amino acid-metal complex is often seen in nature, and its potential application in hydrometallurgy can be foreseen. Alanine (Ala) was first screened as the most effective type of amino acid to be used for the selective leaching of spent hydrodesulfurization catalyst (consisting of MoS₂ and Co₃S₄ supported on Al₂O₃, at 10% Mo and 2.4% Co grades). The sequential 3-step leaching (Step-1: Alkaline Ala leaching at 45°C, Step-2: Hot water leaching at 70°C, Step-3: Second alkaline Ala leaching at 45°C) was conducted where the role of Ala was found to be at lea

SUBMITTER: Phann I 

PROVIDER: S-EPMC9592186 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature