FISCHER-TROPSCH SUPPORTED CATALYST ACTIVATION

摘要

A process for activating a supported metal catalyst or catalyst precursor useful for the hydrogenation of carbon monoxide to form a mixture of hydrocarbons, comprising reducing with a hydrogen-containing gas at elevated temperature so that at least a portion is in the metallic state, impregnatin g under a non-oxidizing atmosphere with a solution of at least one member selected from the group consisting of ammonium slats, alkyl ammonium salts a nd weak organic acids, optionally further including ammonia, to the point where it has absorbed a volume of solution equal to at least about 10 % of its calculated pore volume, oxidizing with a gaseous oxidant in the presence of the impregnating solution and reducing with hydrogen-containing gas at elevated temperatures to form an active catalyst. The steps beginning with t he impregnation may be repeated. Optionally, the catalyst may be calcined after the oxidation step and/or passivated after activation.