Method for preparing hydrorefining catalyst

Abstract

The invention discloses a preparation method of a hydrogenation refining catalyst. The hydrorefining catalyst is to react the mixed solution A containing Ni and W and the alkaline solution of sodium metaaluminate in parallel flow, and age the obtained slurry, and then mix the mixed solution B containing W, Mo and Al with the Ammonia water is added to the above-mentioned aged slurry in parallel, and then aged, and then treated with a mixed aqueous solution of aluminum salt and organic acid after the first drying, molding, and second drying, and then washed, thirdly dried, and roasted. Produced as a hydrorefining catalyst. The catalyst can be applied in ultra-deep hydrodesulfurization and denitrogenation reactions of diesel fractions, has high hydrodesulfurization and hydrodenitrogenation reaction activity, and is especially suitable for processing diesel raw materials with high nitrogen and high sulfur content.

Description

technical field [0001] The invention relates to a method for preparing a hydrorefining catalyst, in particular to a method for preparing a bulk phase hydrorefining catalyst. 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 to the color of the product. ...

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