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Residual oil hydrotreating catalyst and preparation method thereof

A technology of residual oil hydrogenation and catalyst, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc. It can solve problems such as blocked pores and insufficient metal-holding capacity of catalysts, and achieve good diffusion performance and excellent Demetallization performance, concentrated and uniform effect of mesopore size distribution

Pending Publication Date: 2020-04-14
浙江石油化工有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the process flow of this method is simple, the obtained alumina carrier has a small distribution of macropores, which is not conducive to the diffusion of macromolecular reactants to the internal pores, and it is easy to coke to block the pores, and the metal-accommodating capacity of the catalyst is obviously insufficient.

Method used

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  • Residual oil hydrotreating catalyst and preparation method thereof

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preparation example Construction

[0035] A kind of preparation method of residual oil hydrogenation treatment catalyst of the present invention, this preparation method comprises the following steps:

[0036] Step 1): Prepare the carrier: Prepare aluminum salt solution (aluminum trichloride solution), mix the sol by pH swing method, add organic pore expander during the mixing process, lead it into the gel forming tank, and store it at 60-90°C Gelling, after gelling, aging, drying, molding, and then roasting at 550°C to 1100°C to obtain an alumina carrier; the pH swing range is 4 to 10, and the pH of the final reaction system is 8 to 10. allow;

[0037] Step 2): impregnating an equal volume of the alumina support in the impregnation solution of Mo or W and Co or Ni, then drying at 90-150°C for 2-8 hours, and then calcining at 600-800°C for 1-5 Hour, obtain hydrodemetallization catalyst;

[0038] The hydrodemetallization catalyst contains MoO 3 or WO 3 and NiO or CoO, the MoO 3 or WO 3 The total mass of Ni...

Embodiment 1

[0047] (1) Preparation of carrier: prepare 0.98M aluminum chloride solution, and under stirring conditions, add the above aluminum chloride solution and ammonia water into the gelling tank in parallel using the pH swing method, and the flow rate of aluminum chloride is 2.0 ml / min, control the temperature in the glue tank to 70°C, the pH swing range is 4-10, the pH of the final reaction system is 8-10, and at the same time add 2.0ml / min of polystyrene ball pore expander solution The total amount added is 30% of the mass of alumina after calcination. After gelation, aging for 0.5h, drying at 50°C for 60h under vacuum conditions, and extruding, calcining at 700°C for 6h to obtain alumina carrier γ-Al2O 3 ;

[0048] (2) Impregnation of active metals: according to the MoO in the final catalyst 3 The content of NiO is 7.0wt%, and the content of NiO is 2.0%. Weigh an appropriate amount of ammonium heptamolybdate and nickel nitrate to prepare an aqueous solution, impregnate the carri...

Embodiment 2

[0050] (1) Preparation of carrier: prepare 0.98M aluminum chloride solution, and under stirring conditions, add the above aluminum chloride solution and ammonia water into the gelling tank in parallel using the pH swing method, and the flow rate of aluminum chloride is 2.0 ml / min, control the temperature in the glue tank to 70°C, the pH swing range is 4-10, the pH of the final reaction system is 8-10, and at the same time add 2.0ml / min of polystyrene ball pore expander solution The total amount added is 35% of the mass of alumina after calcination. After the gelation is completed, it is aged for 0.5h, dried at 50°C for 60h under vacuum, and extruded and calcined at 700°C for 6h to obtain the alumina carrier γ~Al 2 o 3 ;

[0051] (2) Impregnation active metal: according to the content 7.0wt% of MoO3 in the final catalyst, the content of NiO 2.0%, take by weighing an amount of ammonium heptamolybdate and nickel nitrate and be mixed with aqueous solution, adopt equal volume impr...

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Abstract

The invention discloses a residual oil hydrotreating catalyst and a preparation method thereof. The pore diameters of mesopores of the catalyst are intensively and uniformly distributed; meanwhile, the catalyst is a bimodal pore catalyst with macropores, wherein 50% or more mesopores of 10-30 nm are distributed in a concentrated mode, 25% or more macropores are distributed in a concentrated mode,and the preparation method comprises the steps that an aluminum salt solution is prepared, sol is mixed through a pH swing method, an organic pore-enlarging agent is added, the mixture is guided and added into a gelatinizing tank to be gelatinized, and an aluminum oxide carrier is obtained through aging, drying, forming and roasting; the aluminum oxide carrier is impregnated in impregnation liquid; and by drying and roasting, the hydrodemetallization catalyst is obtained, the catalyst provided by the invention has good diffusivity and excellent demetalization performance, can meet the requirements of diffusion ducts of Ni and V-containing heavy metal compounds, significantly improves the nickel and vanadium removal performance of the catalyst, and improves the demetalization activity, metal capacity and activity stability of the catalyst, and the preparation process is simple and easy to operate.

Description

technical field [0001] The invention relates to a catalyst and a preparation method thereof, more specifically, to a residue oil hydrotreating catalyst and a preparation method thereof, belonging to the field of petrochemical industry. Background technique [0002] With the crude oil becoming heavier and inferior worldwide, the output of residual oil in refineries is increasing day by day, and the processing of vacuum residual oil has become the core of refinery design. The demand for petroleum products tends to be lighter and cleaner. Therefore, it is the key to improve the economic efficiency of refineries to convert residual oil into light oil products and high value-added products, improve product quality, and improve the comprehensive utilization of crude oil. . [0003] As the "bottom oil" in the refining process, residual oil is characterized by being rich in impurities such as sulfur, nitrogen, and heavy metals (mainly Ni and V) in crude oil, and has a large molecul...

Claims

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Application Information

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IPC IPC(8): B01J23/883B01J35/10C10G45/08
CPCB01J23/002B01J23/883B01J37/0018C10G45/08B01J2523/00C10G2300/205C10G2300/206B01J35/615B01J35/635B01J35/638B01J35/653B01J35/647B01J35/651B01J2523/31B01J2523/68B01J2523/847
Inventor 刘亭亭李红良赵旭涛李超然崔登科郭金彪
Owner 浙江石油化工有限公司
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