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Method for preparing hydrogenation catalyst

A technology of hydrogenation catalyst and dispersant, which is applied in the direction of catalyst activation/preparation, molecular sieve catalyst, chemical instruments and methods, etc. It can solve the problems of reduced accumulation of active components, low dispersion, large particles of active components, etc., to achieve Effects of weakening interaction, improving dispersion, and cheap raw materials

Active Publication Date: 2015-02-04
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in general, the catalysts obtained by the impregnation method have the following problems: the metal active components are not evenly distributed on the surface of the carrier, the active component particles are large, and the dispersion is low, which affects the activity of the catalyst
The equilibrium adsorption method uses the reaction between the precursor of the active component and the hydroxyl group on the surface of the carrier to load the active component on the carrier, so that the active component can form smaller crystal grains and have good contact with the surface of the carrier, and the distribution is uniform. Improve dispersion ((N.Spanos et al., Journal of Catalysis, 1990, 124 (2): 301; L.Karakonstantis et al., Journal of Catalysis, 1990, 124 (2): 315; Kordulis et al., Applied Catalysis A: General, 2001, 209: 85), but this method will strengthen the interaction between the active component and the carrier, resulting in a reduction in the accumulation of the active component, forming a relatively large amount of Type I hydrogenation activity center, difficult to vulcanize

Method used

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  • Method for preparing hydrogenation catalyst

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Experimental program
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Effect test

Embodiment 1

[0024] Take H with a concentration of 30wt% 2 O 2 Solution 10mL, add dropwise to 9.92g (containing WO 3 (90.0wt%) ammonium metatungstate, after stirring evenly, add 5.35g nickel nitrate to obtain an impregnation liquid;

[0025] The impregnating liquid was added dropwise to 23.1 g of alumina support, immersed at room temperature for 6 hours, then dried at 110°C for 2 hours, and calcined at 480°C for 4 hours to obtain NiW / Al 2 O 3 For catalyst C1, the contents of tungsten oxide and nickel oxide determined by X-ray fluorescence spectrometry are 26.8 wt% and 4 wt%, respectively.

Embodiment 2

[0027] Take H with a concentration of 30wt% 2 O 2 Solution 10mL, add dropwise to 9.92g (containing WO 3 (90.0wt%) ammonium metatungstate, after stirring evenly, add 5.35g of nickel nitrate to obtain an impregnation solution, then add 0.6g of citric acid and mix evenly;

[0028] The impregnating liquid was added dropwise to 23.1 g of alumina support, immersed at room temperature for 6 hours, then dried at 110°C for 2 hours, and calcined at 480°C for 4 hours to obtain NiW / Al 2 O 3 For catalyst C2, the contents of tungsten oxide and nickel oxide determined by X-ray fluorescence spectrometry were 26.8 wt% and 4 wt%, respectively.

Embodiment 3

[0030] Take H with a concentration of 30wt% 2 O 2 Solution 10mL, add dropwise to 9.92g (containing WO 3 (90.0wt%) ammonium metatungstate, after stirring evenly, add 5.35g of nickel nitrate to obtain an impregnation solution, then add 0.5g of tartaric acid and mix evenly;

[0031] The impregnating liquid was added dropwise to 23.1 g of alumina support, immersed at room temperature for 6 hours, then dried at 110°C for 2 hours, and calcined at 480°C for 4 hours to obtain NiW / Al 2 O 3 For catalyst C3, the contents of tungsten oxide and nickel oxide determined by X-ray fluorescence spectrometry were 26.8 wt% and 4 wt%, respectively.

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Abstract

The invention relates to a method for preparing a hydrogenation catalyst. The preparation method comprises the following steps of: dissolving salts of group VIB metals and group VIII metals in a hydrogen peroxide solution to obtain an impregnation liquid; impregnating the carrier by utilizing the impregnation liquid; and drying and roasting the impregnation product, thus obtaining the hydrogenation catalyst with double metal components. The method for preparing the load type hydrogenation refined catalyst has the advantages that the traditional impregnation method is improved, so that the interaction between active ingredients and the carrier is effectively weakened and the dispersion degree of the components on the carrier is improved. The hydrogen desulfurization and dearomatization activity of the catalyst prepared by the method is higher than that of the catalyst prepared by the traditional impregnation method and having the same active metal content.

Description

Technical field [0001] The invention relates to a preparation method of a catalyst, in particular to a preparation method of a supported hydrogenation catalyst, and belongs to the technical field of preparation of hydrofining catalysts. Background technique [0002] The world demand for oil products is showing an upward trend. Such a large demand for oil products will have a non-negligible impact on society and the environment. Among them, oil quality has become a focus of social attention. With the increasingly stringent environmental legislation and the gradual upgrade of oil quality standards, the production of clean oil products has gradually become a very meaningful task. [0003] Hydrorefining technology is an important method for the production of clean oil products. The supported catalysts with VIB group W or Mo as the main agent, group VIII metal Ni or Co as the auxiliary agent, and alumina as the carrier are currently the most widely used. Hydrorefining catalyst. The im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/888B01J29/16B01J29/78B01J37/02C10G45/08C10G45/12
Inventor 申宝剑王艳丹郭巧霞李景袁儒婷廖礼俊孙发民王甫村戴宝琴田然张志华郭金涛
Owner BC P INC CHINA NAT PETROLEUM CORP