Nickel-based catalyst prepared through solid-phase thermal dispersion and preparation method thereof

Abstract

The invention relates to a supported nickel-based catalyst and a preparation method thereof. The active ingredient of the catalyst is nickel, and the nickel accounts for 5 to 30 percent of the total mass of the catalyst; and silica, active carbon, silica gel, a molecular sieve or alumina is taken as a carrier. In the preparation method, the active ingredient is supported on the surface of the carrier by a solid-phase dispersion method, the dispersibility of the active ingredient is improved and the interaction force between the active ingredient and the carrier is enhanced through the heat treatment process, and a catalyst precursor is reduced through the liquid phase reduction process. Compared with the traditional immersion method, the method has the advantages that: a filtering and drying step is saved, the operating process is more simple, the catalyst preparation cost is low, the energy consumption is low, the method is environment-friendly, the activity of the prepared catalyst is equal to that of the catalyst prepared by the immersion method, and the method is suitable for industrial amplification production of the supported nickel-based catalyst.

Description

technical field

[0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a supported nickel-based catalyst and a preparation method thereof. Background technique

[0002] Nickel-based catalyst is a widely used catalyst, which is mostly used in various hydrogenation reactions, such as pyrolysis gasoline hydrogenation, benzene hydrogenation, nitro reduction and other reactions, and has high catalytic activity and selectivity. It can replace The noble metal catalyst reduces the preparation cost of the catalyst and has a very wide application in industrial production. Among them, nickel-based catalysts mainly include amorphous alloy nickel-based catalysts (such as Ni-B), skeleton nickel catalysts (Raney Ni), supported nickel-based catalysts, and the like. The catalytic activity of amorphous alloy nickel-based catalyst in benzene hydrogenation reaction is higher than that of skeleton nickel, but the specific surface area of ​​the ...

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