Hydrotreating catalyst and preparation method and application thereof

Abstract

The invention provides a hydrotreating catalyst and a preparation method and application thereof .The preparation method of the hydrotreating catalyst comprises the steps that firstly, an aluminum oxide carrier is prepared by adopting a complexing agent roasting-drying combined mode; secondly, complexing agent surface imprednation is conducted on the aluminum oxide carrier, and the aluminum oxide carrier is roasted and modified in inert gas to obtain a modified aluminum oxide carrier; lastly, metal active components are supported through isovolumetric stepped impregnation and directly dried without needing roasting, and then the hydrotreating catalyst is finally prepared .According to the preparation method of the hydrotreating catalyst, the problem that the ratio of L acid on the surface of the aluminum oxide carrier is high can be effectively solved, and meanwhile the strong interaction between active metal and the aluminum oxide carrier can be effectively weakened; the prepared hydrotreating catalyst is suitable for the hydrodesulfurization and hydrodenitrification process of coker gas oil with the high sulfur and nitrogen content and not only has the good hydrodenitrification activity but also has the good hydrodesulfurization activity.

Description

technical field

[0001] The invention belongs to the field of catalysts, and relates to a hydrogenation treatment catalyst, a preparation method thereof and an application of the hydrogenation treatment catalyst in hydrodenitrogenation and desulfurization of coking wax oil. Background technique

[0002] With the intensification of the trend of heavy and inferior crude oil in the world, and the continuous improvement of gasoline and diesel quality requirements in environmental protection regulations, inferior heavy oil is delayed coking, coking wax oil is hydrotreated as raw material for catalytic cracking or hydrocracking. In order to maximize the yield of light oil products, the production of high-quality and low-quality coker wax oil has become the preferred process for delayed coking. Therefore, the hydrotreating of low-quality coker gas oil with high nitrogen content puts forward higher performance requirements for the catalyst.

[0003] At present, industrial catalysts ...

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