Method for regenerating and revivifying hydrogenation catalyst

Abstract

The invention discloses a method for regenerating and revivifying a hydrogenation catalyst, which comprises the steps of treating an inactivated hydrogenation catalyst subjected to sulfur burning and carbon burning treatment with organic sulfur compound-containing thioalcohol and / or thioether and roasting a resulting product, wherein the organic sulfur compound-containing thioalcohol and / or thioether accounts for 0.1 to 2.2 percent of the weight of the inactivated hydrogenation catalyst. The method of the invention can effectively weaken the interaction between metal and the carrier to obtaina regenerated hydrogenation catalyst with high activity restoration degree. The method is particularly suitable for vulcanized hydrofining catalysts and hydrogenation catalysts.

Description

technical field [0001] The invention relates to a regeneration and revival method of a hydrogenation catalyst, in particular to a regeneration and revival method of a sulfurized non-noble metal hydrorefining catalyst or a hydrogenation treatment catalyst. Background technique [0002] Hydrogenation catalysts are key to the production of clean fuel oils and other chemical feedstocks from crude oil. During the hydrogenation process, the catalyst will be deactivated due to various reasons, mainly including: the active metal on the catalyst changes due to long-term operation, the pore structure of the catalyst changes due to the carbon deposit on the catalyst, impurities in the raw oil (such as Catalyst irreversible deactivation caused by metal nickel, vanadium) deposition, etc. Among these phenomena, the influence of carbon deposition is the most obvious. Deactivated hydrotreating catalysts typically contain 3-15% by weight of carbon deposits which result in a reduction in ca...

AI Technical Summary

Problems solved by technology

[0005] CN1298925A discloses hydrogenation catalyst external regeneration method, adopts vertical thin layer moving bed regenerator, and burns sulfur section and burns charcoal section and carries out separately, overcomes burning sulfur and charcoal and burns off at high temperature when exothermic big at the same time Disadvantages, but the degree of recovery of catalyst activity can be further improved

This regeneration method requires repeated washing with a large amount of anhydrous methanol or ethanol, and the process is complicated