Patent ID: 8252253
Filing Date: 2012-08-28
Classification: C22B,Y02P

Abstract:
1. A process for recovering ruthenium from a ruthenium-comprising catalyst, the process comprising: a) reducing a ruthenium comprising catalyst comprising ruthenium oxide on a support, in a gas stream comprising hydrogen chloride and, optionally, an inert gas at a temperature of from 300 to 500° C., to give a reduced catalyst comprising metallic ruthenium present on the support; b) treating the reduced catalyst from a) with hydrochloric acid in the presence of an oxygen-comprising gas, wherein the metallic ruthenium present on the support is dissolved as ruthenium(III) chloride and obtained as an aqueous ruthenium(III) chloride solution; c) optionally, further working up the ruthenium(III) chloride solution from b), wherein the support material is not readily soluble in mineral acid.