MULTIPLE STAGE HYDRODESULFURIZATION PROCESS WITH EXTENDED DOWNSTREAM CATALYST LIFE

摘要

MULTIPLE STAGE HYDRODESULFURIZATION PROCESS WITH EXTENDED DOWNSTREAM CATALYST LIFE Abatract of the Disclosure A multiple stage process for hydrodesulfurizing a residual oil while passing the oil downwardly through a plurality of stages in series with an interstage flashing step. After the catalyst in the downstream stage is deactivated by coke deposition, fresh feed oil is passed directly to the deactivated catalyst to obtain an extended life in the downstream catalyst.