Preparation method of hydroprocessing catalyst

Abstract

The invention discloses a preparation method of a hydroprocessing catalyst. The catalyst is a bulk phase catalyst and comprises Ni<x>W<y>O<z>, MoO3 and aluminum oxide components. The preparation method comprises the following steps of enabling W, Ni and Al components to react with a precipitant to form colloid so as to obtain tungsten, nickel and aluminum precipitate pulp, after performing ageing, performing hydrothermal treatment with steam, adding urea, performing pulping with MoO3, then performing uniform mixing, performing soaking in a solution containing an organic compound, performing shaping and the like so as to prepare the hydroprocessing catalyst. The catalyst is particularly suitable for being used for ultra-deep hydrodesulfurization and denitrification reactions of diesel fraction.

Description

technical field [0001] The invention relates to a preparation method of a hydrogenation treatment catalyst, in particular to a preparation method of a high-activity bulk phase hydrogenation treatment catalyst. 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 the reaction temper...

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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