Application of prevulcanization method by hydrogenation catalyst dry method in residue hydrotreating switchable reactor system

Abstract

The invention relates to an online prevulcanization method by a dry method of a residue hydrotreating switchable reactor system. The application comprises the following steps: carrying out a residue hydrotreating reaction by a switchable up-flow reactor or a fixed bed reactor, prevulcanizing an online cut-in fresh catalyst by a high pressure separator gas of a residue hydrotreating device, and adjusting concentration of hydrogen sulfide in the vulcanized gas by changing the proportion of the high pressure separator gas to the fresh hydrogen, wherein the volume ratio of the fresh hydrogen to the high pressure separator gas is 1:100-100:1; and selectively adding P, Si and F assistants, wherein the catalyst takes aluminum oxide as a carrier and oxides of W, Mo, Co or Ni and the like as a negative carrier. According to the method, the online updated catalyst of the residue hydrotreating switchable reactor system is prevulcanized by means of the high pressure separator gas of the residue hydrotreating device rich in H2S; the method has the advantages of short vulcanizing time, low vulcanizing expense and simplicity in operation.

Description

technical field [0001] The invention relates to the application of a hydrogenation catalyst dry presulfurization method in a switchable reactor system for residual oil hydrogenation. Background technique [0002] At present, the fixed-bed residual oil hydrotreating technology has developed into a mature low-quality residual oil processing technology. However, as crude oil becomes heavier and the content of impurities such as metals is higher and higher, due to the limitations of the fixed bed itself, its operation cycle will be greatly shortened and the operating rate will become lower. In order to ensure a high operating rate of industrial units, even when processing heavy residues rich in metals and asphaltenes, the French Institute of Petroleum (IFP) proposed an interchangeable protection reaction The reactor system (PRS), that is to set up two protection reactors, through the high-pressure switching valve, the two protection reactors can be switched to each other or the...

AI Technical Summary

Problems solved by technology

Since the self-contained sulfide in the vulcanized oil is difficult to decompose at a lower temperature, low-temperature vulcanization is not easy to carry out, and the active metal is easily reduced, and the activity of the catalyst is reduced. Adding a vulcanizing agent will increase the vulcanization cost

For the switchable reactor system, the replacement of the catalyst is more frequent, and the purchase of the vulcanizing agent will be a relatively large expense

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