PROCESSING METHOD OF DEAD PLATINUM-RHENIUM CATALYSTS Russian patent published in 2013 - IPC C22B11/00 C22B61/00 C22B3/44 

FIELD: metallurgy.

SUBSTANCE: method includes dilution of platinum and rhenium by chlorhydric acid, two-staged solution treatment using sodium hydroxide at the first stage with formation of Pt(OH)₄ particles and sodium thiosulfate at the second stage with formation of ReS₂ particles. Solution treatment with reagents is performed upon availability of cellulose fibres in it with formation of hard products of reaction in the form of composite materials consisting of cellulose fibres with Pt(OH)₄ and ReS₂ particles immobilised by them at their chemical deposition. Extraction of composite materials from liquid phase at stages is performed using pressure flotation method.

EFFECT: reducing reagents consumption, simplifying process, providing possibility of process performance in continuous mode.

4 cl, 1 dwg, 3 ex