PROCESSING METHOD OF DEACTIVATED CATALYSTS ON CARRIERS FROM ALUMINIUM OXIDE, WHICH CONTAIN METALS OF PLATINUM GROUP AND RHENIUM Russian patent published in 2013 - IPC C22B11/00 C22B61/00 B01J23/96 

FIELD: metallurgy.

SUBSTANCE: method involves roasting of a catalyst, leaching of a roasted product in acid medium and introduction to the obtained pulp of reagents to improve filtration. Then, non-soluble residue is separated from the solution by filtration and metals of platinum group and rhenium are extracted from the solution. Prior to filtration the pulp is treated with water solution of flocculant of cationic type based on polyacrylamide. The obtained reaction mixture is exposed without mixing till solid and liquid phases are separated. Then, clarified part of the solution is separated by decantation and paper pulp in the form of paper wastes in the quantity of 10-20 kg/m³ of the pulp is added to thickened pulp and mixed, and filtration is performed.

EFFECT: improving efficiency of separation of non-soluble residue from the solution; reducing costs for filtration materials.

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