Preparation method of PdAl2O3 catalyst

Abstract

A preparation method of a PdAl2O3 catalyst belongs to the field of chemistry, and specifically the invention relates to an ultrasonic impregnation method for preparation of a Pd-Al2O3 catalyst. The preparation method of the Pd-Al2O3 catalyst provided by the invention is low in cost, simple in reaction conditions and high in yield. The preparation method of the Pd-Al2O3 catalyst provided by the invention is characterized by comprising the following steps: dissolving PdCl2 and NaCl in deionized water with conductivity less than 1*10<-6> S / cm made in the laboratory, preparing a sodium tetrachloropalladate impregnation solution according to palladium load of 0.13%, adding spherical alumina carriers calcined at different temperatures into the impregnation solution and immediately conducting ultrasonic impregnation in ultrasonic equipment, pouring residual liquid 1-3 h later, aging at room temperature for 3-12 h, finally drying at 100 DEG C, and roasting at 300-600 DEG C to obtain the Pd-Al2O3 catalyst.

Description

technical field [0001] The invention belongs to the field of chemistry, specifically, the invention relates to ultrasonic impregnation method Pd-Al 2 o 3 Catalyst preparation method. Background technique [0002] Catalysts with the same chemical composition may have very different performances. This is due to the different preparation methods and preparation conditions, the microscopic properties of the catalyst (such as the grain size of the active material, the pore size distribution of the catalyst, and the dispersion state of the active components on the surface of the catalyst, etc.) ) are different, resulting in large differences in catalyst activity and selectivity. The common method for preparing supported metal catalysts is to impregnate different types of porous supports with active metal salt solutions. However, the metal dispersion of catalysts prepared by traditional impregnation methods often Low, which affects the full play of the catalytic performance of t...

AI Technical Summary

Problems solved by technology

[0002] Catalysts with the same chemical composition may have very different performances. This is because the microscopic properties of the catalyst (such as the grain size of the active material, the pore size distribution of the catalyst, and the dispersion state of the active components on the surface of the catalyst, etc.) ) are different, resulting in large differences in catalyst activity and selectivity. The common method for preparing supported metal catalysts is to impregnate different types of porous supports with active metal salt solutions. However, the metal dispersion of catalysts prepared by traditional impregnation methods often Low, which affects the full play of the catalytic performance of the active components