US 12,139,675 B1
Processes for prolonging catalyst activity in a hydroprocessing unit
Omer Refa Koseoglu, Dhahran (SA)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed on May 1, 2023, as Appl. No. 18/310,212.
Int. Cl. C10G 65/14 (2006.01)
CPC C10G 65/14 (2013.01) [C10G 2300/4081 (2013.01); C10G 2300/701 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A process for prolonging catalyst activity, the process comprising:
contacting heavy hydrocarbon feedstock, wherein the heavy hydrocarbon feedstock is essentially free of residue, and hydrogen with catalyst in a hydroprocessing unit operating at a pressure of greater than or equal to 100 bars,
performing hydrocracking, hydrodesulfurization, and hydrodenitrogenation in a single stage of the hydroprocessing unit to create a hydroprocessed effluent;
regenerating spent catalyst in a catalyst regeneration unit; and
passing regenerated catalyst back to the hydroprocessing unit without rejuvenating the spent catalyst.