Hydrotreating catalyst as well as preparation method and application thereof

Abstract

The invention discloses a hydrotreating catalyst as well as a preparation method and application thereof. The hydrotreating catalyst comprises a carrier, an active metal component and nano titanium dioxide, and the carrier comprises an Al-SBA-15 mesoporous molecular sieve and aluminum oxide. When the hydrotreating catalyst is used for hydrotreating shale oil distillate oil, the denitrification capacity is high, the operation period of a device can be prolonged, and the operation cost of a refinery plant is reduced.

Description

technical field [0001] The invention relates to a hydrogenation treatment catalyst and a preparation method thereof. The catalyst is especially suitable for the hydrogenation treatment process of shale oil distillate oil. Background technique [0002] Among natural resources, oil shale, like petroleum, is mainly produced by algae and other lower plankton through decay and coalification. The shale oil "squeezed" from oil shale through low-carbon distillation and other methods is called "artificial petroleum". After further processing and refining, liquid fuels such as gasoline, kerosene, and diesel can be produced. In the initial stage of oil shale mining, the development of this industry was restricted due to the unqualified technology and the pollution of the environment during the production process. In recent years, with the advancement of technology, this problem has been well solved. It is foreseeable that under the current situation of shortage of oil resources and h...

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Problems solved by technology

[0005] U.S. Patent No. 4419218 discloses a method for producing jet fuel by hydrocracking shale oil after demetallization, wherein the hydrofinishing preparation uses Mo-Ni-P as the active metal component and alumina as the carrier to hydrocrack The catalyst uses Co-Cr-Mo trimetal as the active component and ZSM-12 molecular sieve as the carrier. The yield of jet fuel reaches 70%, but the refining effect is poor, which affects the quality of cracked products.

[0006] CN101590416A discloses a method for preparing a molybdenum-nickel hydrogenation catalyst. The method uses two steps of kneading and impregnation to prepare the catalyst. First, molybdenum oxide, titanium-containing compounds, and phosphorus-containing compounds are added to alumina and / or alumina Add nitric acid solution to the precursor, knead, extrude, dry and roast to obtain an alumina molding containing titanium, phosphorus and molybdenum, then impregnate nickel-containing phosphoric acid solution, dry and roast to obtain a molybdenum-nickel hydrogenation catalyst , but the catalyst is not effective for refining distillate oil with high nitrogen content

[0007] CN1052501A discloses a hydrorefining catalyst and its preparation method. The catalyst uses silica-alumina as a carrier, adopts W-Mo-Ni three kinds of active metal components and boron additives, impregnates by segmental impregnation, and dries , The finished catalyst is obtained after roasting, when the nitrogen content increases, the denitrification effect is not obvious

[0008] The hydrotreating catalyst prepared by the prior art has low denitrification activity, especially when encountering shale oil distillates with high nitrogen content, the denitrification effect is not good, which will directly affect the reaction performance of the catalyst in the subsequent cracking section reactor, and then Affect the quality of cracked products, shorten the operation cycle of the unit, and increase the operating cost

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