Comparative Analysis of the Efficiency of Molybdenum Trioxide Extraction from a Spent Hydraulic Catalyst

The technological process uses catalysts containing oxide compounds of molybdenum, cobalt or nickel deposited on an alumina substrate. After a certain time, the activity of the components decreases and the unrecoverable spent catalysts usually become toxic waste. Technogenic residues are prohibited for disposal, and it is advisable to use the exhausted catalyst components for subsequent recycling. Recycling of industrial waste is a solution to an environmental problem. Processing should be organized with the extraction of valuable components, in particular expensive molybdenum oxide (VI). This work is devoted to finding ways to optimize the process of extracting molybdenum from spent hydrotreating catalysts. © 2023 ASSA.