Regenerating method for catalyst for catalyzing diesel oil hydrocracking

Abstract

The invention discloses a regenerating method for a catalyst for catalyzing diesel oil hydrocracking. The method comprises the following steps: (1) roasting an inactivated hydrocracking catalyst in the process of catalyzing the diesel oil hydro-conversion under an oxygen-containing atmosphere till the decarburization rate is 40%-80%, thereby acquiring a decarburized catalyst; and (2) processing the decarburized catalyst acquired in the step (1) at high temperature in an inert atmosphere, thereby acquiring a regenerated hydrocracking catalyst. After the catalyst regenerated according to the invention is applied to the process of catalyzing the diesel oil hydro-conversion, the initial activity stabilizing time of the catalyst of the device is shortened, the working time is shortened, the deactivation rate of the catalyst is reduced, and the running period of the catalyst is prolonged.

Description

technical field [0001] The invention relates to a regeneration method of a catalyst, in particular to a regeneration method of a catalytic diesel hydrocracking catalyst. Background technique [0002] In recent years, with the increasingly heavy quality of crude oil processed in China, the raw materials processed by catalytic cracking are also becoming heavier and inferior. In addition, many companies have carried out the optimization of catalytic cracking units in order to improve the quality of gasoline or increase the production of propylene. The modification or improvement of the operating severity of the catalytic cracking unit resulted in deterioration of the quality of catalytic cracking products, especially catalytic diesel. [0003] In order to improve the utilization rate of petroleum resources, improve the overall quality level of gasoline and diesel fuel, realize the goal of product blending optimization and product value maximization, and meet the growing demand ...

AI Technical Summary

Problems solved by technology

However, there are also some problems in the industrial application of this technology: First, compared with other hydrocracking technology processes, the product distribution and product quality of the FD2G technology process in the initial stage of operation are quite different from the design target. The value and gasoline production rate are obviously low, and the product distribution and gasoline product quality gradually improve with the extension of operation time until reaching a relatively stable level

This process is relatively slow (usually more than 1 month), and it is prominent in industrial devices that the quality of gasoline products is not up to standard for a long period of time in the early stage of operation, which affects the benefits of the enterprise, and further operation to the end of the reaction, the reaction conditions It is more harsh. With the increase of carbon deposition, serious carbon deposition occurs on both strong acid and non-strong acid catalysts, and active metals gather, and the catalyst activity and reaction performance are seriously lost. Therefore, from the reaction conversion rate, product distribution and product quality Both dropped sharply, unable to meet the reaction requirements, at this time the catalyst needs to be regenerated

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