On-stream method of residual oil hydrogenation process

Abstract

The invention discloses an on-stream method of a residual oil hydrogenation process, comprising the steps of: selecting oxidation-state residual oil hydrogenation serial catalysts according to the requirement of the residual oil hydrogenation process, wherein the oxidation-state residual oil hydrogenation serial catalysts comprise a residual-oil-hydrogenation protective agent, a residual-oil-hydrogenation demetalization catalyst, a residual-oil-hydrogenation desulfurization catalyst and a residual-oil-hydrogenation denitrification agent; treating the residual-oil-hydrogenation protective agent, the oxidation-state residual-oil-hydrogenation desulfurization catalyst and the oxidation-state residual-oil-hydrogenation denitrification agent by using an ex-situ pre-sulfurization method; and loading the needed catalysts in a reactor, heating, activating and switching the residual oil raw materials to carry out the hydrogenation. Through the method provided by the invention, ex-situ pre-sulfurization is only carried out on partial catalysts needed by the residual oil hydrogenation process, thereby keeping the advantages of the ex-situ pre-sulfurization process, saving the production cost and preventing the increase of the production cost caused by the high loss, which is easily caused in the ex-situ pre-sulfurization process, as the residual-oil-hydrogenation demetalization catalyst per se has low intensity.

Description

technical field [0001] The invention relates to a start-up method of a residual oil process, in particular to a process start-up method using an external presulfurized residue oil hydrogenation catalyst. technical background [0002] With the slow growth of crude oil production and the increasingly heavy quality, the increasing market demand for light oil products, and the increasingly stringent environmental protection regulations, the world pays special attention to the technology of residue oil upgrading, and the processing capacity of residue oil Rapid growth, especially the fastest development of fixed bed residual oil hydroprocessing technology, accounting for about 85.3% of the world's residual oil hydrogenation capacity. The research in this field at home and abroad is unprecedentedly active, Chevron, UOP, Exxon, Shell and IFP and other large companies have their own characteristics of residual oil hydrotreating technology. [0003] The characteristics of the residu...

AI Technical Summary

Problems solved by technology

When the residual oil hydrogenation catalyst is presulfided, generally all types of catalysts are vulcanized separately. Since there are many types of catalysts, each catalyst has different properties, and the required sulfidation treatment conditions are also slightly different. When the hydrogen catalyst is presulfurized, the production process is more complicated

At the same time, the amount of catalyst is large, and the amount of catalyst that requires external presulfidation treatment is relatively large. The external pretreatment process takes a long time, and the processing cost increases. Under the circumstances, it may affect the on-time start-up of the residual oil hydrogenation unit

At the same time, due to the low strength of certain types of catalysts, it is easy to cause excessive loss during the pre-sulfurization process outside the device, resulting in increased production costs.

Images