Verfahren zur Herstellung eines besonders fuer die NO-Hydrierung zu Hydroxylamin geeigneten Platinkatalysators

摘要

Improved platinum catalyst with high life period, activity and selectivity for the production of hydroxylammonium salts by the reduction of nitric oxide with hydrogen, the catalyst being obtained by hydrolyzing the water soluble platinum compound at a pH of 4.5 to 9.0 and at a temperature of 20 DEG to 100 DEG C. in the presence of a carrier which is insoluble in strong acids, thereby precipitating platinum oxide hydrate onto said carrier in finely divided form and thereafter reducing the platinum oxide hydrate to metallic platinum.