Patent ID: 9669394
Date: 2017-06-06
CPC Classifications: B01J,C10G

Claim:
1. A method for preparing a catalyst for hydrodesulfurization of residuum hydrocarbon feedstocks which method comprises: impregnating a porous extruded support comprising a titania alumina extrudate formed from a peptized co-precipitated titania alumina powder having 5 wt % or less titania based on the total weight of the titania alumina, said support having a total pore volume in the range of from about 0.5 to about 1.0 cubic centimeters per gram, at least 70% of the total pore volume in pores having a diameter between about 70 Å and about 130 Å, less than 5% of the total pore volume have pores in a diameter above 300 Å, as determined by nitrogen porosimetry, and less than 2% of the total pore volume in pores having a diameter above 1000 Å, as determined by mercury penetration porosimetry with an aqueous solution containing at least one catalytic agent or catalytic agent precursor selected from the group consisting of a compound of Group 6 metals of The Periodic Table, Group 9 metals of the Periodic Table, Group 10 metals of The Periodic Table, and combinations thereof, and a phosphorous compound in an amount which provides a phosphorous concentration in the range of about 0.22 to about 3.0 wt % of phosphorous, calculated as elemental phosphorous, based on the weight of the total catalyst composition, said compounds being thermally decomposable to their corresponding metal oxides, and thereafter drying and calcining the resulting impregnated support to provide a supported catalyst.