Precious metal loaded three-dimensional mesoporous silico-aluminate catalyst and preparation method thereof

Abstract

The invention discloses a preparation method for a precious metal loaded three-dimensional mesoporous silico-aluminate catalyst. The method comprises the following steps: with a saturated butanol aqueous solution as a reaction medium, adding a defined amount of silicon source into a reaction process; regulating a reaction system, thereby compounding a three-dimensional mesoporous silico-aluminate carrier material; performing precious metal loading, thereby preparing the precious metal loaded silico-aluminate catalyst with a three-dimensional netted mesoporous structure. The catalyst prepared according to the invention has a three-dimensional mesoporous structure; a mesopore is assembled by nanometer silico-aluminate bars; the catalyst wholly has excellent pore connectivity, high specific surface area and high pore volume; the loaded precious metal active components are uniformly distributed on the catalyst carrier; the compounding condition is mild; the reaction is easily controlled; the catalyst has excellent application prospect in the petrochemical engineering field, the catalyst field and especially the field of deoxidation hydrogenation of biomass diesel oil and utilization of biomass diesel oil by-products and is suitable for industrial popularization.

Description

technical field [0001] The invention belongs to the technical field of inorganic composites, and in particular relates to a three-dimensional mesoporous aluminosilicate catalyst supported by a noble metal and a preparation method thereof. Background technique [0002] As we all know, supported catalysts occupy an irreplaceable and important position in the modern petrochemical field, and aluminosilicate supports are often used in the petrochemical and catalytic industries due to their good stability, low price, acidity and good thermal stability on the surface. The most widely used catalyst or catalyst carrier. Precious metal nanoparticles are often used as active components in various catalytic reactions due to their stable chemical properties, not easy to be oxidized, and their excellent physical properties and unique catalytic activity. [0003] Noble metal-supported catalysts not only have the advantages of high catalytic activity, high temperature resistance, and oxida...

AI Technical Summary

Problems solved by technology

Li Sanxi et al. synthesized an aluminosilicate-supported iron-based late-transition metal ethylene polymerization catalyst. The catalyst has the advantages of high loading efficiency, low cost, and high activity of the prepared catalyst, but its disadvantage is that the catalyst as a whole poor pore structure

Fu Qiang et al. invented a method for synthesizing a supported catalyst, which mixed a crystalline aluminosilicate molecular sieve with a solution containing competing adsorbents and metal ions, and then carried out silanization treatment. The catalyst prepared by this method was dissolved in methanol C can be increased in the reaction of converting olefins 2 ~C 4 Olefin selectivity, but its post-treatment process is more complex and cumbersome

[0005] However, the existing noble metal-supported catalysts have a series of problems such as complex preparation process, poor pore structure, and uneven loading of active components.

So far, the synthesis of noble metal-supported aluminosilicate catalysts with special pore properties has not been reported in domestic and foreign literatures and patents.

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