Diesel oil hydrofining catalyst containing phosphorous or molecular sieve and preparation method thereof

Abstract

The invention relates to a diesel hydrofining accelerant, wherein a carrier is a modifying product that the titania and the silicon dioxde composite oxides is modified by P, HY molecular sieve or the molecular sieve modifying material; a active component is two metals of cobalt, molybdenum, nickel, tungsten; the hole volume of the accelerant is 0. 4-0. 7ml/g, and the specific surface area of the accelerant is 150-350m2/g. The invention also relates to a method preparing for the accelerant, which specially relates to the method modifying the property with phosphorus or the molecular sieve, in order to achieve the deep desulfuration, the denitrification and denying aromatic hydrocarbons of the diesel.

Description

technical field [0001] The invention relates to a catalyst for diesel hydrofinishing, in particular to a diesel hydrofinishing catalyst obtained by modifying a titanium dioxide and silicon dioxide composite oxide carrier and a preparation method thereof. Background technique [0002] With the increasing requirements for environmental protection, the restrictions on vehicle emissions have become more stringent, and the content control indicators of sulfur, nitrogen, aromatics and other harmful substances in clean diesel specifications have also been continuously improved. Hydrogenation is the most effective means to achieve diesel desulfurization, denitrogenation and dearomatization. The performance of the catalyst used in the hydrogenation process plays a key role in the technical level of the hydrogenation process. An ideal diesel hydrogenation catalyst should have high catalytic desulfurization, denitrogenation and aromatics saturation activities, so that the hydrogenation...

AI Technical Summary

Problems solved by technology

However, the catalyst is still insufficient in terms of deep desulfurization and denitrification. Facing the current situation of increasing diesel consumption and stricter restrictions on vehicle emissions, it is necessary to further improve and improve

[0008] To sum up, when the existing catalysts supported by alumina or titania, silica, or modified alumina are used for hydrogenation of diesel fuel, it is difficult to have good hydrodesulfurization, denitrification and denitrification at the same time. The properties of aromatics, whether it is a single-component carrier or a composite-component carrier catalyst, cannot meet the requirements for the deep refining of diesel oil. Therefore, the continuous development of new diesel hydrotreating catalysts is the direction of the industry's efforts