Verfahren zur Rückgewinnung von verbrauchtem Rhenium

摘要

Process for recovery of rhenium from catalysts comprising rhenium oxide deposited on a porous support containing alumina, characterised in that the catalyst is first heated in an atmosphere containing oxygen and then treated with an aqueous solution of hydrogen peroxide and finally extracted with an aqueous solution of ammonia at a pH higher than 12. The extraction solution can be employed directly for the preparation of a new catalyst.