Catalyst carrier and preparation method thereof

A technology of catalyst support and alumina support, which is applied in the direction of catalyst support, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of small surface modification of alumina, unguaranteed co-precipitation conditions, and high preparation costs. Achieve the effects of easy regulation of acidity and alkalinity, improved performance and low preparation cost

Active Publication Date: 2009-07-29
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0006] EP0339640 discloses a method for preparing titanium-containing alumina by co-precipitation method. Since the co-precipitation method is the co-precipitation of two or more species under certain conditions, the co-precipitation conditions cannot guarantee that all species are in the best condition. conditions,

Method used

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  • Catalyst carrier and preparation method thereof

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Embodiment 7

[0045] According to the volume ratio of 1:3, 0.20mol / L ZrOCl 2 ·8H 2 The O aqueous solution is dropped into 0.5mol / L ammonia solution, and the resulting precipitate is washed and filtered to obtain ZrO(OH) 2 Hydrogels. Disperse the gel in deionized water, add a mixture of polyglycerol 600 and polyvinyl alcohol, the weight ratio of polyglycerol 600: polyvinyl alcohol is 1:1, and the amount of organic additives added is 10% of the total volume of the sol. Two hours. The alumina carrier of Example 1 was put into it, dipped for 10 minutes, taken out and dried at room temperature for 8 hours, and calcined at 500° C. for 3 hours to obtain a composite oxide carrier. Its main properties are listed in Table 1.

[0046] Experiment No. 8: Comparative Example 1

[0047] Combine 1000ml 2mol / L aluminum nitrate, 1000ml 0.05mol / L zirconium nitrate and 120ml silica gel (containing SiO 2 25%), add the mixed solution of ammonia water and polyglycerol 2000 (average molecular weight 2000), wherein amm...

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PUM

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Abstract

The invention relates to a method for preparing a catalyst carrier. The method comprises: molding alumina dry glue powder and drying the molded alumina dry glue powder to obtain an alumina carrier; loading a solution, sol or suspension containing titanium oxide or/and a zirconium oxide precursor onto the alumina carrier by a dip coating method; and obtaining the catalyst carrier after drying and baking. The preparation method adopts dip coating to disperse titanium oxide or zirconium oxide on the surface of the carrier to modify the surface of alumina, adjust the acid content of the surface of the carrier, reduce acting force between metallic component and the carrier and finally increase the hydrogenation activity of catalyst. The catalyst carrier obtained by the preparation method has a zirconium oxide or titanium oxide content of 1 to 15 weight percent of, a specific surface area of 250 to 500m/g, a pore volume of 0.6 to 1.0ml/g and a NH3-TPD total acid content of 0.3 to 0.8 mmol/g. Moreover, the catalyst carrier is suitable to be used in the preparation of petroleum fractions hydrogenation catalyst.

Description

Technical field [0001] The invention relates to a catalyst carrier and a preparation method thereof, in particular to a hydrogenation refined composite oxide carrier and a preparation method thereof. Background technique [0002] The alumina carrier has simple preparation process, high specific surface, good mechanical strength and suitable pore diameter. It is one of the most widely used catalyst carriers at present. The preparation and modification of alumina carrier and the preparation of aluminum-containing composite oxides have always been scientific The direction of the worker's research. At present, support materials such as zirconium oxide and titanium oxide have gradually received attention. These materials have attracted much attention due to their high melting point, high strength, excellent hydrogenation and catalytic performance. It has unique advantages, such as good sulfur resistance and easy reduction of the supported metal. However, the specific surface of zircon...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J27/19B01J21/06
Inventor 徐黎明高玉兰曹凤兰李崇惠陈光
Owner CHINA PETROLEUM & CHEM CORP
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