Patent ID: 6787496
Filing Date: 2004-09-07
Classification: B01J,C10G

Abstract:
A process for forming an active catalyst from a used, hydrocarbon containing, supported catalyst comprising one or more members selected from the group consisting of Co, Ni, Cu, Ru, Rh, Re, Pd, Pt, Os and Ir, the process comprising the following steps:a) decreasing the hydrocarbon content of the used catalyst to produce a low hydrocarbon content catalyst; b) impregnating the low hydrocarbon content catalyst under a non-oxidative atmosphere with a solution of at least one of an ammonium salt and an alkyl ammonium salt, optionally in combination with up to about five moles of ammonia per liter of solution; c) oxidizing the catalyst of step b with a gaseous oxidant in the presence of the impregnating solution to produce an oxidized catalyst; and d) reducing the oxidized catalyst with a hydrogen-containig gas at elevated temperatures thereby forming an active catalyst.