Patent ID: 7968069
Filing Date: 2011-06-28
Classification: B01J,C10G

Abstract:
1. A process for preparing a catalyst for the hydrodesulfurization of residua and heavy crudes previously treated in a first stage of the hydrotreating process, comprising the steps: a. preparing a support from boehmite in which 5-20 wt % of the total boehmite is peptized with an inorganic acid to form a binder and the remainder of the boehmite and deionized water are added to the binder to form a homogenous paste, and forming said paste into extrudates; b. aging said extrudates at a temperature of 20°-25° C. for 12-18 hours, drying said extrudates at a temperature of 100°-120° C. for 2-6 hours, and calcining said dried extrudates at a temperature of 500°-600° C. for 3-5 hours using a heating ramp of 2° C./min, to obtain gamma alumina; c. impregnating the gamma alumina with a titanium precursor by the incipient wetness impregnation method using an organic solvent to provide content of 3-6 wt % of titanium; d. aging the impregnated support at a temperature of 20°-25° C. for 12-18 hours, followed by drying at a temperature of 100°-120° C. and calcining at a temperature of 400°-500° C., to obtain the anatase phase of titanium on the surface of the gamma alumina; and e. impregnating the resulting titania/alumina support (TiO