Method of noble metal-zeolite catalyst activation with Bronsted acid compound

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 1×10.sup. -14 to about 2×10.sup.-1.