Patent ID: 6635170
Filing Date: 2003-10-21
Classification: C10G

Abstract:
A continuous process for interstage stripping between two hydroprocessing zones which comprises:(a) passing a hydrocarbon feedstock to a first hydroprocessing zone and hydroprocessing the feedstock under first hydroprocessing conditions to form a first hydroprocessed product, said first hydroprocessing zone having a first hydroprocessing temperature and pressure; (b) passing the first hydroprocessed product to a first stripping zone; (c) stripping the first hydroprocessed product to form a first gaseous and liquid effluent; (d) passing the liquid effluent from the first stripping zone to a second hydroprocessing zone and hydroprocessing the liquid effluent under second hydroprocessing conditions to form a second hydroprocessed product, said second hydroprocessing zone having a second hydroprocessing temperature and pressure; (e) passing the second hydroprocessed product to a second stripping zone; (f) stripping the second hydroprocessed product to form a second gaseous and liquid effluent; and (g) passing at least a portion of the second gaseous effluent to the first stripping zone and contacting said second gaseous effluent with the first liquid effluent, wherein said portion of the second gaseous effluent passed to said first stripping zone is used as a stripping gas in said first stripping zone.