Patent ID: 8518241
Filing Date: 2013-08-27
Classification: C10G

Abstract:
1. A method of processing a hydrocarbonaceous feedstock having a predetermined entering flow rate comprising the steps of: providing two or more hydroprocessing stages disposed in sequence and in fluid communication, each hydroprocessing stage having a hydroprocessing reaction zone with a hydrogen requirement and each stage disposed to receive a process flow and to produce a hydroprocessed effluent; providing hydrogen only through a make-up gas compressor; providing the hydrocarbonaceous feedstock at a first temperature; separating the hydrocarbonaceous feedstock flow into a first portion of fresh feed for a first hydroprocessing stage and a second portion of fresh feed for a second hydroprocessing stage; heating the first portion of fresh feed to a second temperature that is greater than the first temperature; supplying the first portion of fresh feed with hydrogen from the hydrogen source in an amount sufficient to satisfy all gas requirements of all the hydroprocessing stages; passing the heated, hydrogen enriched first portion of fresh feed as a process flow through the first hydroprocessing stage to form a hydroprocessed effluent wherein the volume of the hydroprocessed effluent exceeds the volume of the second portion of fresh feed; quenching a hydroprocessed effluent of a preceding hydroprocessing stage with the unheated second portion of fresh feed; and passing a process flow including the hydroprocessed effluent of the preceding hydroprocessing stage quenched with the second portion of fresh feed to the second hydroprocessing stage, the hydrogen requirement for second hydroprocessing stage supplied from the process flow into the second hydroprocessing stage.