Hydrotreating catalyst and preparation method thereof

Abstract

The invention discloses a hydrotreating catalyst and a preparation method thereof. The catalyst is a bulk-phase catalyst; components of the hydrotreating catalyst comprise hydrogenation active metal ingredients W, Ni and Mo, and aluminum oxide, wherein the W and the Ni exist in the form of a compound oxide: NixWyOz; the Mo exists in the form of MoO3. The active-site density of the active metal W and Ni in the epiphase of the catalyst is high; the utilization rate of hydrogenation active metal is high; meanwhile, the pore structures of the catalyst are reasonable; the active metal is more uniformly dispersed; the mechanical strength is high; the hydrotreating catalyst is particularly suitably applied to the ultra-deep hydrodesulfurization and denitrification reactions of a diesel fraction.

Description

technical field [0001] The invention relates to a hydrogenation treatment catalyst and a preparation method thereof, in particular to a high-activity bulk phase hydrogenation treatment catalyst and a preparation method thereof. Background technique [0002] At present, in the world, crude oil is becoming increasingly heavy and inferior, coupled with the continuous development of the world economy and increasingly stringent environmental protection regulations, it is necessary to produce a large amount of light clean fuel. The development and use of ultra-low sulfur or even sulfur-free gasoline and diesel is the trend of clean fuel development in the world today. The use of traditional hydrodesulfurization catalysts can also achieve deep desulfurization or even ultra-deep desulfurization of diesel oil by increasing the severity of the reaction, such as increasing the reaction temperature, hydrogen partial pressure or reducing the reaction space velocity, but the increase in t...

AI Technical Summary

Problems solved by technology

[0010] The bulk phase hydrogenation catalyst disclosed by CN102049265A adds ammonium bicarbonate during the coprecipitation process, and the bulk phase hydrogenation catalyst disclosed by CN102451703A adds carbon dioxide during the coprecipitation process to generate carbonate or bicarbonate. It releases a certain amount of gas during the roasting process. Under the impact of the gas, the pore volume and specific surface area of ​​the catalyst are increased, so that more metal active sites are exposed on the surface of the catalyst, but this method will cause some pores to collapse. , the pore distribution is dispersed, the mechanical strength is reduced, and the active metal is locally aggregated, and the exposed metal active sites are limited