Hydrocracking after-treatment catalyst and preparing method thereof

Abstract

The invention discloses a processing catalyzer after hydrogenated cracking and preparing method, adopting alumina as carrier, Mo and / or Wu as well as Ni and Co as active components, and P as catalyst promoting component. Firstly, it carries a part of Ni on the carrier by mixed kneading, and then uses Ni-Mo-Co-P mixed solution for dipping to make the catalyzer. It has higher NiO content, higher Ni / Ni+Mo atomic ratio, especially applied to processing the course of producing low-mercaptan product after hydrogenated cracking.

Description

technical field [0001] The invention relates to a hydroprocessing catalyst and a preparation method thereof, in particular to a hydrocracking post-treatment catalyst and a preparation method thereof. Background technique [0002] Hydrocracking is a petroleum refining process that breaks high-boiling hydrocarbons through C-C bonds to form small molecules and low-boiling target products. In the process of hydrocracking, raw materials are cracked to produce a small amount of olefins that react with H2S in the system to form mercaptans. Generally, too high a reaction temperature will be unfavorable for olefin saturation and more likely to form mercaptans. The presence of mercaptan in the product can not only cause the product to produce stench and reduce the quality and stability of the oil product, but also the mercaptan itself is corrosive. With the increase of high-sulfur crude oil refining volume and the strengthening of environmental protection regulations, the problem of...

AI Technical Summary

Problems solved by technology

Chinese patent CN 1229838A improves on this basis, so that the hydrorefining of dedistillation alcohol can not only be carried out at a relatively low reaction temperature of 150-260 ° C, but also has a low hydrogen-to-oil ratio (5-30). This method Although the reaction conditions are milder and the mercaptan removal effect is better, the hydrofinishing process used is different from the usual hydrocracking post-treatment conditions, and cannot be directly matched with the hydrocracking process

Usually, in order to achieve a higher Ni / (Mo+Ni) ratio, several steps of impregnation are used, which increases the process and complicates the process.