Preparation method of oil slurry selective hydrogenation catalyst

By preparing Mo-Co type catalysts and optimizing the catalyst structure using a rotary vacuum impregnation dryer and γ-Al2O3 support, the problem of balancing desulfurization and hydrogenation activity of tricyclic and tetracyclic aromatic hydrocarbons in catalytic slurry was solved, achieving efficient hydrodesulfurization and selective reaction.

CN117772234BActive Publication Date: 2026-08-07CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Application Number
CN202211133385.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-09-18
Publication Date
2026-08-07
Estimated Expiration
2042-09-18

AI Technical Summary

Technical Problem

Existing technologies struggle to simultaneously achieve efficient desulfurization and reduce the hydrogenation saturation activity of tricyclic and tetracyclic aromatic hydrocarbons in catalytic slurry, leading to decreased catalyst activity and increased reaction difficulty.

Method used

A molybdenum-cobalt impregnation solution with a volume greater than that of the support pores was prepared using a rotary vacuum impregnation dryer and a reasonable vacuum operation procedure. Combined with a γ-Al2O3 support, a Mo-Co type catalyst was prepared. The catalyst structure was optimized by controlling the crystal length of the active phase and the stacking ratio through in-vessel or out-of-vessel sulfidation treatment.

Benefits of technology

It improves the desulfurization activity and selectivity of the catalyst, accelerates the reaction rate, reduces the saturation rate of tricyclic and tetracyclic aromatic hydrocarbons, shortens the preparation process, saves energy consumption, and improves the catalyst's resistance to coking.

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Abstract

The application discloses a preparation method of an oil slurry selective hydrogenation catalyst, and comprises the following steps: (1) preparing a molybdenum-cobalt impregnation solution with a volume greater than the pore volume of a catalyst carrier; (2) adding the catalyst carrier into a rotary vacuum impregnation dryer, spraying the molybdenum-cobalt impregnation solution onto the catalyst carrier under the conditions of rotation and vacuum, and then performing vacuumizing, rotary drying, and calcination to obtain the oil slurry selective hydrogenation catalyst. The oil slurry selective hydrogenation catalyst prepared by the method has both desulfurization activity and low three-ring and four-ring aromatic hydrocarbon saturation performance, and is suitable for a selective hydrogenation desulfurization reaction of catalytic oil slurry.
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