METHOD FOR MULTI-STAGED HYDROPROCESSING USING QUENCH

摘要

Methods for processing a hydrocarbonaceous feedstock flows are provided. In one embodiment, the method includes providing two or more hydroprocessing stages disposed in sequence, each hydroprocessing stage having a hydroprocessing reaction zone with a hydrogen requirement and each stage in fluid communication with the preceding stage. The hydrocarbonaceous feedstock flow may be separated into portions of fresh feed for each hydroprocessing stage, and the first portion of fresh feed to the first hydroprocessing stage is heated. The heated first portion of fresh feed may be supplied with hydrogen from the hydrogen source in an amount satisfying substantially all of the hydrogen requirements of the hydroprocessing stages to a first hydroprocessing zone. The unheated second portion of fresh feed is injected counter current to the process flow as quench at one or more locations in one or more of the reaction zones.

主权项

1. A method of processing a hydrocarbonaceous feedstock comprising:
hydroprocessing a feed in two or more hydroprocessing stages disposed in sequence and in fluid communication, each hydroprocessing stage having a hydroprocessing reaction zone with and each stage disposed to receive a process flow comprising at least a liquid and to produce a hydroprocessed effluent; and controlling the temperature of the hydroprocessing stages using mixed vapor and liquid quench streams wherein a mixed vapor phase and liquid phase quench stream is injected into each hydroprocessing reaction zone counter current to the process flow, wherein the mixed vapor phase and liquid phase quench stream from the first stage hydroprocessing reaction zone provides a portion of the process flow to a second stage hydroprocessing reaction zone and wherein the mixed vapor phase and liquid phase quench streams comprise at least a portion of the feed.