High surface area composition for use in the catalytic hydroconversion of a heavy hydrocarbon feedstock, a method making such composition and its use

摘要

A catalyst composition that is especially useful in the hydroconversion of pitch, micro carbon residue and sulfur contents of a heavy hydrocarbon feedstock without the excessive formation of sediment. The catalyst composition is a reasonably high surface area composition containing alumina and a low molybdenum content with a high ratio of nickel-to-molybdenum. The catalyst composition further has a unique pore distribution that in combination with the special metals loading provide for good conversion of pitch and micro carbon residue without an excessive yield of sediment.

主权项

1. A non-impregnated catalyst composition providing for a high conversion of pitch and MCR with a minimal amount of sediment formation when used in the hydroprocessing of a heavy hydrocarbon feedstock, wherein said non-impregnated catalyst composition comprises:
alumina powder that has a material absence of phosphorus and consists essentially of alumina; a molybdenum component in an amount of greater than or equal to 5 wt. % and less than 11 wt. %, with the wt. % being based on the total weight of said non-impregnated catalyst composition and assuming said molybdenum component is in the oxide form (MoO3) regardless of its actual form; a nickel component present in an amount such that said non-impregnated catalyst composition has a weight ratio of said nickel component-to-said molybdenum component exceeding 0.25, with said weight ratio being computed assuming said nickel component and said molybdenum component are each in the oxide form regardless of their actual forms, wherein said non-impregnated catalyst composition has a total surface area in the range of from 240 m2/g to 360 m2/g, a total pore volume in the range of from 0.65 cc/g to 1.1 cc/g and a pore size distribution such that from 11% to 30.5% of the total pore volume is present in macropores of diameter greater than or equal to 250 Å, and having a pore size distribution such that from 50% to 80% of the total pore volume of said non-impregnated catalyst composition is present as pores having diameters in the range of from 55 Å to 115 Å.