FIELD: methods of extraction and separation of platinum and rhenium in processing waste bimetallic reforming catalysts.
SUBSTANCE: proposed method includes alkali sintering and aqueous leaching-out for obtaining the solution containing sodium permeate and insoluble residue. Alkali sintering is carried out in presence of oxidant in form of agent generating the gaseous sulfur anhydride, sodium bisulfate or sodium permeate in particular. Insoluble residue is leached-out with hydrochloric acid for dissolving of platinum. Through extraction of rhenium and platinum into commercial product ranges from 96.6 to 99.2%, respectively. Proposed method requires no special equipment.
EFFECT: high degree of extraction of platinum and rhenium.
3 cl, 2 ex
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