PROCESS FOR HYDROTREATING A HYDROCARBON OIL

摘要

A process or hydrotreating a hydrocarbon oil that employs a first reactor and a second reactor. The hydrocarbon oil is hydrotreated in the first reactor with a first hydrotreating catalyst in the presence of a first stream of hydrogen-containing gas to obtain a first effluent. The first effluent is separated using a stripping column to provide a hydrotreated hydrocarbon oil and used hydrogen-containing gas. A second stream of hydrogen-containing gas is heated within a section of a heating device arranged upstream of the first reactor to obtain a stream of heated hydrogen-containing gas. The stream of heated hydrogen-containing gas is contacted in the second reactor in the presence of at least part of the hydrotreated hydrocarbon oil with a second hydrotreating catalyst to obtain a second effluent which comprises a further hydrotreated hydrocarbon oil.

主权项

1. A process for hydrotreating a hydrocarbon oil employing at least a first reactor and a second reactor, which process comprises:
(i) providing a first stream of hydrogen-containing gas; (ii) hydrotreating the hydrocarbon oil in the first reactor with a first hydrotreating catalyst in the presence of the first stream of hydrogen-containing gas as provided in step (i) to obtain a first effluent; (iii) separating the first effluent as obtained in step (ii) into a hydrotreated hydrocarbon oil and used hydrogen-containing gas using a stripping column employing a hydrogen-containing gas as stripping gas; (iv) providing a second stream of hydrogen-containing gas which is heated within a section of a heating device which is arranged upstream of the first reactor to obtain a stream of heated hydrogen-containing gas; and (v) contacting in the second reactor at least part of the stream of heated hydrogen-containing gas as obtained in step (iv), optionally in the presence of at least part of the hydrotreated hydrocarbon oil as obtained in step (iii), with a second hydrotreating catalyst to obtain a stream of used hydrogen-containing gas, and a second effluent which comprises a further hydrotreated hydrocarbon oil when hydrotreated hydrocarbon oil as obtained in step (iii) is also present.