Verfahren zur Wiedergewinnung von Katalysatoren

摘要

Copper and vanadium values are recovered from oxidation catalysts contained in the mother liquor after separating adipic acid from the reaction mixture obtained by oxidising with nitric acid starting materials containing cyclohexanol and/or cyclohexanone, by evaporating the mother liquor in the presence of sulphuric or phosphoric acids to remove water and nitric acid, followed by centrifugal separation.