Catalyst carrier and preparation method thereof

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...

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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, so the method has inherent flaws

[0007] In summary, the preparation methods reported in the current literature have disadvantages such as complex process, high preparation cost, easy aggregation of titanium oxide or zirconium oxide in the alumina bulk phase, and little effect on the modification of the alumina surface.

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