CONCENTRATED RHODIUM CATALYST APPARATUS AND MANUFACTURE THEREOF

摘要

The specification teaches a method of enriching a catalyst system in which both platinum and rhodium are present. The enrichment increases the amount of rhodium which is actively available for use as a catalyst. The enrichment is brought about by thermally aging the catalyst system in an oxidizing atmosphere by heating it to a temperature in a range from 650.degree.C to 875.degree.C for a period of at least tow hours. A thermal aging at a temperature of about 800.degree.C for a period of 4 to 8 hours is preferred.