Hydrorefining catalyst and preparation method thereof

Abstract

The invention discloses a hydrorefining catalyst and a preparation method thereof, wherein the hydrorefining catalyst is a bulk phase hydrorefining catalyst, and comprises a hydrogenation active metalcomponent, an auxiliary agent component and alumina, the hydrogenation active metal component is WO3, NiO and MoO3, and after the vulcanization of the hydrorefining catalyst, the stacked layers is more, the length of the sheet layer is short, and the pore distribution is suitable. The preparation method comprises: carrying out co-current flow on a mixing solution A containing Ni, W and an auxiliary agent component and a sodium metaaluminate alkaline solution, carrying out a reaction, aging the obtained slurry, adding a mixing solution B containing W, Mo, Al and an auxiliary agent component and ammonia water into the aged slurry in a co-current flow manner, aging, drying, molding, and carrying out other steps to prepare the hydrorefining catalyst. According to the present invention, the hydrorefining catalyst can be used in the ultra-deep hydrodesulfurization and denitrification reactions of diesel fuel distillate, has high hydrodesulfurization and hydrodenitrogenation reaction activities, and is especially suitable for treating diesel fuel raw materials with high nitrogen content and high sulfur content.

Description

technical field [0001] The invention relates to a hydrogenation catalyst and a preparation method thereof, in particular to a bulk phase hydrogenation refining catalyst and a preparation method thereof. Background technique [0002] At present, 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 and clean fuels. 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 temperature will lead ...

AI Technical Summary

Problems solved by technology

The bulk phase catalyst obtained by this method has a high content of active metals in the surface phase, which is easy to accumulate excessively, thereby affecting the morphology and dispersion of the stacked layer of the active phase

[0011] In the existing co-precipitation method for preparing bulk catalysts, different precipitation methods and gelation conditions will have a great impact on the coordination mode of the catalytic active metal, the distribution of the hydrogenation active metal and the interaction between different hydrogenation active metals. The effect of the sulfided bulk catalyst will also lead to MoS 2 / WS 2 There is a marked difference in the shape of the