Method of starting up a hydrocracking process

Abstract

Abstract START-UP METHOD COMPRISES CONTACTING THE HYDROCRACKING CATALYST WITH A HYDROGEN-CONTAININ G GAS AT A PRESSURE BETWEEN ABOUT 0 AND ABOUT 2,500 P.S.I.G. AND A TEMPERATURE BETWEEN ABOUT 400* F. AND ABOUT 850* F.; COOLING THE CATALYST TO MINIMIZE CONVERSION OF HYDROCARBONS; CONTACTING THE CATALYST WITH A FIRST PRELIMINARY HYDROCARBON FEEDSTOCK HAVING LOW CONCENTRATIONS OF NITROGEN, SULFUR AND AROMATICS IN A MANNER THAT WILL NOT DELETERIOUSLY AFFECT THE CATALYST; INCREASING THE TEMPERATURE IN THE REACTION ZONE TO OBTAIN CONVERSION OF THE FIRST PRELIMINARY HYDROCARBON FEEDSTOCK TO LOWER-BOILING HYDROCARBONS; STOPPING THE FLOW OF THE FIRST PRELIMINARY HYDROCARBON FEEDSTOCK; AND CONTACTING THE CATALYST WITH A PRICIPAL PETROLEUM HYDROCARBON FEEDSTOCK. THE HYDROCRACKING CATALYST COMPRISES A HYDROGENATION COMPONENT ON A CO-CATALYTIC SUPPORT. THE PREFERRED SUPPORT COMPRISES ULTRASTABLE, LARGEPORE CRYSTALLINE ALUMINOSILICATE MATERIAL SUSPENDED IN A POROUS MATRIX OF AMORPHOUS SILICA-ALUMINA. THE PREFERRED HYDROGENATION COMPONENT COMPRISES A MIXTURE OF COBALT OXIDE AND MOLYBDENUM TRIOXIDE.

Inventors

• 👤 James F Mosby
• 👤 James C Koller Jr

Bibliographic Details