Modified gamma-alumina and hydrogenation catalyst, and preparation method and application of hydrogenation catalyst

A hydrogenation catalyst and catalyst technology, applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, chemical instruments and methods, etc., to achieve extended service life, good industrial application prospects, good dispersibility and The effect of structural stability

Active Publication Date: 2017-12-29
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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Problems solved by technology

[0009] Aiming at the problem that the existing preparation technology is difficult to achieve high dispersion of active metals while also having excellent structure and performance stability, the present invention provides a hydrogenation catalyst and its preparation method and application. The hydrogenation catalyst prepared by the method , not only the dispersion and activity of the active components are significantly improved, but also the service life of the catalyst is also significantly improved

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  • Modified gamma-alumina and hydrogenation catalyst, and preparation method and application of hydrogenation catalyst
  • Modified gamma-alumina and hydrogenation catalyst, and preparation method and application of hydrogenation catalyst
  • Modified gamma-alumina and hydrogenation catalyst, and preparation method and application of hydrogenation catalyst

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preparation example Construction

[0035] The second aspect of the present invention provides a method for preparing a modified gamma-alumina carrier, the preparation method comprising the following steps:

[0036] (1) contacting the gamma-alumina carrier with an aqueous solution containing urea and a water-soluble salt of Group VIII metal elements, performing heat treatment, then drying the heat-treated solid and then roasting to obtain a roasted solid;

[0037] (2) impregnating the calcined solid obtained in step (1) with an aqueous solution containing fluorine elements, drying and calcining to obtain a modified γ-alumina carrier.

[0038] According to the present invention, the shape of the gamma-alumina carrier can be spherical, strip-shaped, clover-shaped, cylindrical particles or amorphous powder. In the present invention, the gamma-alumina carrier is preferably cylindrical particles with a diameter of 1 mm to 5 mm.

[0039] According to the present invention, γ-Al 2 o 3 The carrier can be obtained comm...

Embodiment 1

[0090] (1) 75g gamma-alumina carrier (specific surface area 215m 2 / g, pore volume 0.60mL / g) is immersed in an aqueous solution containing 9.0g urea, 14.6g nickel nitrate hexahydrate, 4.0g ammonium nitrate and 250g deionized water (the pH value of the aqueous solution is 8), and the mixture is transferred to 500mL In an autoclave, it was heat-treated at 85°C for 18 hours, filtered, washed, then dried at 120°C for 3 hours, and calcined at 450°C for 3 hours in an air atmosphere.

[0091] (2) The obtained solid was impregnated with 50 mL of a solution containing 7.5 g of ammonium fluoride for 1 h, dried at 120° C. for 3 hours, and calcined at 450° C. for 3 hours in an air atmosphere to obtain a modified alumina carrier. The SEM image of the modified alumina carrier is as follows figure 1 shown. from figure 1 It can be seen that the surface of the alumina carrier has a large number of network structures. The grid density and B acid content of the modified alumina support are l...

Embodiment 2

[0113] (1) 75g gamma-alumina carrier (specific surface area 255m 2 / g, pore volume 0.80mL / g) is immersed in an aqueous solution containing 9.0g urea, 14.6g cobalt nitrate hexahydrate, 4.0g ammonium nitrate and 250g deionized water (the pH value of the aqueous solution is 7.5), and the mixture is transferred to 500mL In an autoclave, it was heat-treated at 75°C for 24 hours, filtered, washed, then dried at 120°C for 3 hours, and calcined at 550°C for 2 hours in an air atmosphere.

[0114] (2) The obtained solid was impregnated with 50 mL of a solution containing 10.0 g of ammonium bifluoride for 1 h, dried at 100° C. for 8 hours, and calcined at 500° C. for 2.5 hours in an air atmosphere to obtain a modified alumina carrier. The grid density and B acid content of the modified alumina support are listed in Table 1.

[0115] (3) Using 48 mL of a solution containing 14.6 g of nickel nitrate hexahydrate and 36.8 g of sodium molybdate dihydrate as the impregnating solution, impregn...

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Abstract

The invention relates to a catalyst carrier and a hydrogenation catalyst, and a preparation method of the hydrogenation catalyst. The method comprises the following steps: (1) making a gamma-alumina carrier contact with a mixture containing urea, a water-soluble salt of a group VIII metal element and water, carrying out heat treatment, drying the solid after heat treatment and then roasting, and thus obtaining a solid after roasting; (2) impregnating the solid obtained in the step (1) in an aqueous solution containing fluorine, drying, and roasting to obtain a modified gamma-alumina carrier; and (3) impregnating the modified gamma-alumina carrier obtained in the step (2) with a solution containing water-soluble salts of a group VIB metal and a group VIII metal. The invention also provides the hydrogenation catalyst prepared by the method and an application of the hydrogenation catalyst in hydrodesulfurization and/or hydrodenitrogenation. Compared with the prior art, the hydrogenation refined catalyst provided by the invention not only has the activity improved obviously, but also has the service life of the catalyst improved obviously.

Description

technical field [0001] The present invention relates to a modified γ-alumina, a hydrogenation catalyst comprising the modified γ-alumina, a preparation method thereof, a hydrogenation catalyst prepared by the method and its application in hydrodesulfurization and / or denitrogenation application. Background technique [0002] Hydrogenation technology is the most important means of producing clean oil products, among which efficient hydrogenation catalyst is the core technology of hydrogenation technology. The main active component is VIB group metal W or Mo, the VIII group metal Ni or Co is the auxiliary active component, and γ~A1 2 o 3 Or modified γ~A1 2 o 3 The supported catalyst is a hydrogenation catalyst widely used in industry at present. γ~A1 2 o 3 Because of its suitable mechanical strength, acidity and pore structure, using it as a carrier or modifying it has been widely used in the preparation of hydrorefining and hydrocracking catalysts. [0003] The traditi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/883B01J23/882B01J23/888B01J21/04B01J32/00C10G45/08
CPCB01J21/04B01J23/882B01J23/883B01J23/888B01J35/04B01J37/0207C10G45/08
Inventor 韩伟龙湘云李明丰杨清河邵志才
Owner CHINA PETROLEUM & CHEM CORP
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