Patent ID: 6066586
Filing Date: 2000-05-23
Classification: B01J

Abstract:
A process of regenerating solid catalysts deteriorated by deposition of carbonaceous materials from hydrocarbon decomposition which consists essentially of contacting a deteriorated catalyst containing carbonaceous deposits in an amount of from about 1 wt % to about 30 wt %, based on the weight of the deteriorated catalyst, with a nitrogen oxide gas other than nitrous oxide or a mixture of an inert gas and a nitrogen oxide-containing gas other than a nitrous oxide-containing gas at a temperature ranging between 200.degree. C. and 800.degree. C., wherein said nitrogen oxide-containing gas has an NOX concentration of at least 100 ppm and said catalyst is selected from the group consisting of hydrocracking catalysts, reforming catalysts, hydrorefining catalysts, hydrodenitration catalysts, hydrodesulfurization catalysts, silica-alumina cracking catalysts and silica-magnesia cracking catalysts.