Regeneration method of hydrogenation catalyst

Abstract

The invention provides a regeneration method of a hydrogenation catalyst. The method comprises the following steps: (1) mixing inactivated hydrogenation catalysts A1 and A2, soaking the mixture in a solvent, and carrying out ultrasonic treatment to obtain a catalyst B and a mixed material mixed with black powder; (2) recovering the catalyst B, and filtering the mixed material mixed with the black powder to obtain powder C; (3) grinding the catalyst B into powder, and screening to obtain catalyst powder D; forming, drying and roasting the catalyst powder D to obtain a regenerated carrier; (4) dissolving the powder C in liquid paraffin, and stirring; and then dipping on a regenerated carrier, cooling, carbonizing, and carrying out hydro-thermal treatment to obtain the regenerated hydrogenation catalyst. According to the method, active metal components do not need to be additionally supplemented, the desulfurization performance of the regenerated catalyst is good, the dosage of a vulcanizing agent can be reduced, the vulcanizing time can be shortened, and the obtained regenerated hydrogenation catalyst has a reasonable pore structure, strength and metal distribution.

Description

technical field [0001] The invention relates to a catalyst regeneration method, more specifically, to a method for preparing a hydrodesulfurization catalyst by regeneration of a spent catalyst. 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 regene...

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.