Regeneration method of hydrogenation catalyst

Abstract

The invention provides a regeneration method of a hydrogenation catalyst. The method comprises the following steps: (1) immersing an inactivated hydrogenation catalyst A in a solvent, carrying out ultrasonic treatment to obtain a catalyst B and a mixed material mixed with black powder, recovering the catalyst B, and filtering the mixed material mixed with the black powder to obtain powder C; (2) grinding the catalyst B into powder, and screening to obtain catalyst powder D; (3) forming, drying and roasting the catalyst powder D to obtain a regenerated carrier; and (4) dissolving the powder C obtained in the step (1) in diesel oil, dipping on a regenerated carrier, and drying to obtain the regenerated hydrogenation catalyst. According to the method disclosed by the invention, additional supplement of active metal components is not needed, interaction between the carrier and metal molybdenum is basically eliminated in the preparation process of the catalyst, and uniform dispersion of molybdenum sulfide can also be realized, so that the obtained regenerated hydrogenation catalyst has relatively good physicochemical properties and activity. And the use amount of the vulcanizing agent can be reduced and the vulcanizing time can be shortened at the start-up stage of the industrial device.

Description

technical field [0001] The invention relates to a catalyst regeneration method, more specifically, to a hydrogenation catalyst regeneration method. Background technique [0002] Residual oil hydrogenation technology has the characteristics of strong feedstock adaptability, simple production and operation process, etc., and can provide high-quality feedstock for downstream catalytic cracking processes. It has become one of the most important heavy oil processing technologies in modern oil refining and petrochemical industries. In particular, in recent years, the amount of residual oil hydrotreating in China has been increasing, and the demand for residual oil hydrogenation catalysts has also increased significantly. In addition, the residual oil contains high content of metals, colloids, and asphaltenes, resulting in a generally 1 to 2-year operating cycle of the residual oil hydrogenation unit, and the catalyst will not be regenerated for use. Therefore, there are a large a...

AI Technical Summary

Problems solved by technology

[0008] To sum up, the conventional methods of burning sulfur and carbon are adopted in the prior art, and the physical and chemical properties and structure of the regenerated hydrogenation catalyst cannot meet the requirements of industrial production.