US 11,866,657 B1
Two-stage hydrotreating of hydrocarbons
Omer Refa Koseoglu, Dhahran (SA)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Oct. 31, 2022, as Appl. No. 18/051,119.
Int. Cl. C10G 65/04 (2006.01)
CPC C10G 65/04 (2013.01) [C10G 2300/202 (2013.01); C10G 2300/4006 (2013.01); C10G 2300/4012 (2013.01); C10G 2300/4018 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of processing a hydrocarbon fraction, the method comprising:
hydrotreating the hydrocarbon feedstock in a low-severity hydrotreater to produce a first effluent, and
hydrotreating the first effluent, or a portion thereof, in a high-severity hydrotreater to produce a low contaminant product; wherein
the low-severity hydrotreater operates at a catalyst volume of less than 60% of a catalyst volume of the high-severity hydrotreater;
the low-severity hydrotreater operates at a hydrogen partial pressure of at least 5 bar lower than the hydrogen partial pressure in the high-severity hydrotreater; and
the low-severity hydrotreater operates at a weighted average bed temperature (“WABT”) of at least 5° C. less than the WABT of the high-severity hydrotreater.