Regeneration and reactivation method of heavy distillate oil hydrotreatment catalyst

Abstract

The invention relates to a regeneration and reactivation method of a heavy distillate oil hydrotreatment catalyst, which comprises the following steps: putting a regenerated catalyst into a solution containing an inorganic assistant and an organic chelating ligand assistant, and dipping under sound field conditions; airing an impregnated sample at room temperature; and carrying out two-step heat treatment to obtain the activated catalyst. According to the method, the effective specific surface area of the regenerated catalyst is increased, the dispersity of active components is improved, the catalyst treated and regenerated by the method is high in vulcanization degree, the number of active phases is increased, the reaction activity of the catalyst is improved, no ammonia nitrogen is discharged in the catalyst reactivation process, and the environment is not polluted.

Description

technical field

[0001] The invention belongs to the field of catalyst regeneration and revival, in particular to a catalyst regeneration and revival method for heavy distillate oil hydrotreating. Background technique

[0002] The hydrotreating process of petroleum fractions is one of the effective means to produce clean fuels, and its core is a hydrotreating catalyst. During long-term use, due to chemical reactions such as condensation and dehydrogenation on the surface of the catalyst, macromolecular carbon-containing compounds are formed, covering the active center of the catalyst, reducing the effective surface area of ​​the catalyst reaction, and finally making the catalyst completely inactive. By means of regeneration-resurrection, the activity of the old catalyst is restored, the disposal of the old catalyst is reduced, the operating cost of the refinery is reduced, the environment is protected, and it has certain social and economic benefits.

[0003] The hydrotreati...

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