Regeneration method of hydrogenation catalyst

Abstract

The invention discloses a regeneration method of a hydrogenation catalyst. The method comprises the following steps: 1, the hydrogenation catalyst to be regenerated is in contact with an oxygen-containing gas to carry out carbon burning regeneration; and 2, an organic compound is introduced to a carbon-burnt catalyst obtained in step 1, and at least one low-temperature heat treatment is carried out, wherein no calcination is carried out. The regenerated catalyst realizes direct in-situ sulfuration of metals on the surface of the catalyst without a generation reaction of hydrogen sulfide or a sulfuration reaction of hydrogen sulfide and the active metal in the sulfuration starting process, so the initial sulfuration temperature at working starting of the catalyst is greatly improved, the problem of too fast temperature rising in the catalyst sulfuration process is solved, and the starting time is greatly shortened.

Description

technical field [0001] The invention relates to a regeneration method of a hydrogenation catalyst. Background technique [0002] With the sales of refining catalysts increasing year by year, the production of spent catalysts is also increasing year by year. [0003] If the spent catalysts are not managed scientifically, the toxic and harmful components in them will pollute the environment and endanger human health, and some of the precious metal resources will also be lost. [0004] Therefore, the regeneration and utilization of deactivated hydrogenation catalysts has drawn extensive attention from industry and academia. [0005] Improving the activity of the regenerated hydrogenation catalyst not only has high social benefits, but also brings considerable economic benefits to refineries. [0006] In the prior art, after the hydrogenation catalyst is regenerated, it is generally an oxidized catalyst, and the catalyst needs to be presulfurized before use. [0007] Hydrogen...

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Problems solved by technology

[0018] Since hydrogen sulfide is generated during the vulcanization process, hydrogen sulfide reacts with active metals, and this process will generate a lot of heat, resulting in a rapid rise in the temperature during the vulcanization process

[0019] In order to avoid excessive temperature rise, the vulcanization process heats up slowly, but this will cause the catalyst vulcanization time to be too long, which is not conducive to shortening the start-up time

[0020] Furthermore, both the existing internal presulfurization and external presulfurization will cause insufficient vulcanization of the active metal component in the hydrogenation catalyst, poor dispersion of the active metal, and the inability of the active metal component to fully play its role, resulting in metal waste

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