Reactivation of noble metal-zeolite catalysts

摘要

A method for reactivating noble metal-containing zeolites containing sulfur oxide poisoned noble metal such as oxygen regenerated platinum zeolite beta catalysts, by contacting the catalyst with an acidic aqueous solution having a pH below about 7. The solution contains a Bronsted acid compound having a dissociation constant ranging from about 1x10-14 to about 2x10-1.