Magnesium oxide-silicon dioxide composite catalyst carrier and preparation method thereof

Abstract

The invention discloses a magnesium oxide-silicon dioxide composite catalyst carrier, and also discloses a preparation method of the composite catalyst carrier. The preparation method comprises the following steps: (1) preparing a silicon dioxide suspension: using tetraethoxysilane as a raw material, adding absolute ethyl alcohol, conducting stirring for 20-40min, then adding ammonia water, and continuing stirring for 1-2h to obtain the silicon dioxide suspension; (2) adding a water-soluble magnesium salt to the silicon dioxide suspension, adding ammonia water for regulating the pH value to 8-9, conducting magnetic stirring for reacting for 20-36h in a water bath of 50-60DEG C to obtain a magnesium oxide-silicon dioxide suspension; and (3) cooling the magnesium oxide-silicon dioxide suspension to room temperature, conducting filtering, washing and baking, and conducting calcining in a 500-600DEG C muffle furnace for 3-6h to obtain the magnesium oxide-silicon dioxide composite catalyst carrier. The method disclosed by the invention is mild in reaction conditions, and the magnesium oxide-silicon dioxide composite catalyst carrier prepared by the method has a good pore structure and adsorption property and can be used as a carrier of a functional material or a metallic catalyst.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a magnesium oxide-silicon dioxide composite catalyst carrier and a preparation method thereof. Background technique [0002] The study of the interaction between metal and support has made people realize the special chemical properties of magnesium oxide as a catalyst support. At present, some people have systematically studied the interaction between magnesium oxide as a carrier or auxiliary agent and active components. However, due to the small specific surface area of ​​magnesium oxide itself. Poor mechanical strength, etc., make its industrial application more difficult. [0003] In order to overcome these defects, in recent years, some researchers have developed magnesia-silica composite oxide supports. For example, Martin et al. prepared magnesia-silica Silicon support, and investigated the performance of its supported Co-Cu and Li catalysts. However, the disadvantage...

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Problems solved by technology

But, the shortcoming of this method preparation magnesia-silicon dioxide composite oxide support is to require high temperature and high pressure conditions, and the pore structure and adsorption performance of the prepared magnesia-silicon dioxide composite oxide support are relatively poor