Method for preparing hydrogenation catalyst

A hydrogenation catalyst and dispersant technology, applied in catalyst activation/preparation, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of reduced accumulation of active components, low degree of dispersion, large particles of active components, etc. The effect of weakening interaction, improving dispersion, and cheap raw materials

Active Publication Date: 2013-04-03
BC P INC CHINA NAT PETROLEUM CORP +1
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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 the concentration of 30wt% H 2 o 2 Solution 10mL, dropwise added to 9.92g (containing WO 3 90.0wt%) ammonium metatungstate, after stirring evenly, add 5.35g of nickel nitrate to obtain the impregnation solution;

[0025] Add the impregnating solution dropwise to 23.1g of alumina carrier, impregnate at room temperature for 6 hours, then dry at 110°C for 2 hours, and calcined at 480°C for 4 hours to obtain NiW / Al 2 o 3 Catalyst C1, the contents of tungsten oxide and nickel oxide determined by X-ray fluorescence spectrometry were 26.8wt% and 4wt%, respectively.

Embodiment 2

[0027] Take the concentration of 30wt% H 2 o 2 Solution 10mL, dropwise added to 9.92g (containing WO 3 90.0wt%) in 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] Add the impregnating solution dropwise to 23.1g of alumina carrier, impregnate at room temperature for 6 hours, then dry 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 26.8wt% and 4wt%, respectively.

Embodiment 3

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

[0031] Add the impregnating solution dropwise to 23.1g of alumina carrier, impregnate at room temperature for 6 hours, then dry 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 were determined to be 26.8wt% and 4wt% by X-ray fluorescence spectrometry.

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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 hydrogenation refining catalysts. Background technique [0002] The demand for oil products in the world 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, the quality of oil products has become a focus of social attention. With the increasingly stringent environmental legislation and the gradual upgrading of oil quality standards, the production of clean oil has gradually become a very meaningful work. [0003] Hydrofining technology is an important method for the production of clean oil products. The supported catalyst with VIB group W or Mo as the main agent, VIII group metal Ni or Co as the auxiliary agent, and alumina as the carrier is currently the most widely used Hy...

Claims

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Application Information

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Patent Type & Authority Applications(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
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