Abstract
Physicochemical foundations of the complex processing of worked-out hydrofinishing catalysts are investigated experimentally. The kinetics and mechanism of dissolution of Mo(VI) oxide from the worked-out catalyst in aqueous solutions of mineral acids and sodium carbonate are investigated with the use of models of formal heterogeneous kinetics in order to select the reagent and leaching conditions. The behavior of the main components of the system during the sintering of alumina residue with sodium carbonate is determined, and the optimal conditions are determined based on a thermodynamic simulation of sintering with the use of the Astra software complex. A production flow chart of the industrial processing of worked-out hydrofinishing catalysts while obtaining ammonium paramolybdate, alumina, or coagulants is obtained.
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