On-stream method of residual oil hydrogenation process

Abstract

The invention discloses an on-stream method of a residual oil hydrogenation process, comprising the following steps of: selecting oxidation-state residual oil hydrogenation-series catalysts according to the requirement of the residual oil hydrogenation process, wherein the oxidation-state residual oil hydrogenation-series catalysts comprise a residual-oil-hydrogenation protective agent, a residual-oil-hydrogenation metal catalyst, a residual-oil-hydrogenation desulfurization catalyst and a residual-oil-hydrogenation denitrification catalyst, and the oxidation-state residual-oil-hydrogenation desulfurization catalyst and / or the oxidation-state residual-oil-hydrogenation denitrification catalyst are / is processed in an ex-situ presulfurization method; introducing a vulcanizing agent, with the amount accounting for 95-150% of the theoretically-required sulfur amount of all the oxidation-state residual-oil-hydrogenation catalysts, to the catalysts to be subjected to presulfurization; and filling the required catalyst in a reactor, heating, activating, and then switching the residual oil raw materials to carry out hydrogenation. In the method, ex-situ presulfurization is only carried out on partial catalysts required by the residual oil hydrogenation process so that the advantages of saving the production cost and reducing the catalyst loss when the advantage of an ex-situ presulfurization process is kept.

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.

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