METHOD OF PROCESSING SPENT CATALYSTS CONTAINING NOBLE METALS AND RHENIUM Russian patent published in 2019 - IPC C22B7/00 C25C1/20 C22B11/00 B01J23/96 

FIELD: metallurgy.

SUBSTANCE: invention relates to the metallurgy of noble metals and can be used in the processing of spent catalysts based on aluminum, silicon, magnesium oxides containing noble metals and rhenium. Spent catalysts are poured into an electrolyzer containing an anode, a cathode and one bipolar porous electrode-collector (BPE-C) for accumulation of noble metals and rhenium in the electrolyte. BPE-C is placed in the space between the anode and the cathode. Current is passed through the anode and cathode. Oxide metal is deposited on the cathode, and the noble metals and rhenium are on the BPE-C. BPE-C is made in the form of a cellular matrix, inert with respect to the metal and electrolyte obtained at the cathode, with an open porous structure formed by internal pores or capillaries, or channels, or cavities filled with metal produced at the cathode, and the release of oxygen or carbon dioxide at the anode. Spent catalysts before grounding in the electrolyzer are crushed to 40–100 microns, followed by heating to 100–150 °C, after which it is fed to the electrolyte in the anode space of the electrolyzer between the anode and BPE-C.

EFFECT: method allows complex processing not only of spent catalysts containing platinum group metals and rhenium with their extraction, as well as catalyst matrix into aluminum or silumin with an increase in yield.

13 cl, 6 dwg