RESID HYDROTREATING CATALYST CONTAINING TITANIA

摘要

Improved catalyst supports, supported catalyst, and method of preparing and using the catalysts for the hydrodesulfurization of a residuum hydrocarbon feedstock are disclosed. The catalyst supports comprise titania alumina having 5 wt % or less titania and have greater than 70% of their pore volume in pores having a diameter between 70 and 130 and less than 2% in pores having a diameter above 1000. Catalysts prepared from the supports contain Groups 6, 9 and 10 metals or metal compounds, and optionally phosphorus, supported on the titania alumina supports. Catalysts in accordance with the invention exhibit improved sulfur and MCR conversion in hydrotreating processes.

主权项

1. A process for preparing a porous support material for supporting catalytically active metals suitable for the hydrodesulfurization of residuum hydrocarbon fractions under hydrotreating conditions, which process comprises:
(a) preparing a co-precipitated titania alumina powder having wt % or less titania, based on the total weight of the titania alumina powder; (b) peptizing the titania alumina powder; (c) extruding the titania alumina powder to form a titania alumina extrudate; and calcining the extrudate at a temperature from about 500° C. to about 900° C. for about 1 hour to about 3 hours to obtain a titania alumina support having 5 wt % or less titania, based on the total weight of the support, wherein the support is characterized as having: (i) a total pore volume from about 0.5 to about 1.1 cubic centimeters per gram; (ii) at least 70% of the total pore volume in pores having a diameter of about 70 Å to about 130 Å; (iii) less than 5% of the total pore volume in pores having a diameter above 300 Å, as determined by nitrogen porosimetry; and (iv) less than 2% of the total pore volume in pores having a diameter above 1000 Å, as determined by mercury penetration porosimetry.