Patent ID: 6383975
Filing Date: 2002-05-07
Classification: B01J,C10G

Abstract:
A process for preparing a hydrotreating catalyst for hydrodenitrogenation, hydrodesulfurization and hydrodemetallization of middle and heavy oil fractions which comprises,impregnating a group IVB metal oxide into a support comprising gamma alumina or delta alumina or a mixture thereof by contacting said alumina support in the form of an extrudate having a geometric form with a solution of a group IVB metal oxide which is soluble in an organic solvent to form a group IVB metal oxide impregnated alumina support, drying and calcining said group IVB metal oxide impregnated alumina support, impregnating said calcined group IVB metal oxide impregnated support with an aqueous solution of an active metal compound by impregnation of said group IVB metal oxide impregnated alumina support to form an active metal impregnated alumina support, aging said active metal impregnated alumina support and calcining said active metal impregnated alumina support to form a hydrotreating catalyst, said hydrotreating catalyst having a surface area between 150 and 300 m2/g, pore volume between 0.4 and 0.8 cm3/g, a pore volume distribution with 0-10% of the pores smalled than 50 Angstroms, 10-80% of pores between 50 and 100 Angstroms, 10-60% of the pores of 100 to 200 Angstroms, 0 to 25% of pores of 200 to 500 Angstroms, and 0 to 10% of the pores larger than 500 Angstroms.