Process to prevent catalyst deactivation in activated slurry hydroprocessing
AssigneeChevron Research and Technology Company
InventorDavid C. Kramer
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Abstract
An improved catalytic slurry hydroprocess comprising a hydrogenation zone having a hydrogen partial pressure of at least about 100 psia characterized by active catalyst recycle accompanied by minimal catalyst deactivation from coking or asphaltene agglomeration in which the improvement comprises the steps of: (1) separating at least a portion of active catalyst from the liquid hydrogenation product eluted from the hydrogenation zone of said hydroprocess, and (2) recycling at least a portion of said separated active catalyst to said hydrogenation zone; wherein said steps are carried out while maintaining said active catalyst under conditions substantially the same as those encountered in said hydrogenation zone.
Claims16
In an improved catalytic slurry hydroprocess having at least a hydrogenation zone the improvement which comprises the following steps and conditions:
- (1) concentrating at least a portion of recyclable active catalyst in the liquid hydrogenation product eluted from said hydrogenation zone of said hydroprocess;
- (2) separating at least a portion of said concentrated catalyst from the liquid hydrogenation products;
- and
- (3) recycling at least a portion of said separated active catalyst to said hydrogenation zone;
- wherein said steps are carried out while maintaining said active catalyst in a reducing atmosphere under conditions which have been found to prevent deactivation caused by coking or asphaltene agglomeration.
Dependencies are inferred from the claim text.