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US 4,391,740 AGranted
Large pore shaped hydroprocessing catalysts
AssigneeChevron Research Company
InventorKirk R. Gibson
Life of this patent
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Abstract
Catalyst shapes for inorganic oxide, hydroprocessing catalysts are disclosed. When the catalyst is used for diffusion limited reactions, and particularly when it is used for demetalation, shaped catalysts give longer catalyst lifetimes. Preferred shapes include oval and elliptical shapes, with and without bumps.
Claims8
A catalyst for hydroprocessing heavy hydrocarbonaceous feedstocks comprising:
- elongated extrudates of catalyst, said catalyst having between 2 and 15 weigh percent of a catalystic metal from Group VIB and between 0 and 10 weight percent of a catalystic metal from Group VIII, where said weight percent is based on the catalytic metal content of the total catalyst weight, calculated as reduced metal, supported on refractory inorganic oxide;
- said extrudates having oval cross section and a section extending from the flat surface of the oval;
- said extrudate cross section capable of being circumscribed by a rectangle having a first dimension in the range of between about 0.0600 inch to about 0.085 inch, a second dimension, perpendicular to said first dimension in the range of between 0.030 inch to about 0.065 inch;
- said elongated extrudate having a surface area to volume ratio of less than 95 reciprocal inches.
1 more element
Dependencies are inferred from the claim text.