Loaded nickel-indium (Ni-In) intermetallic compound catalyst and preparation method thereof

Abstract

The invention belongs to the technical field of the catalyst preparation, and in particular relates to a loaded nickel-indium (Ni-In) intermetallic compound catalyst and a preparation method thereof. Adjustable hydrotalcite consisting of components such as nickel magnesium indium-lactate dehydrogenase (NiMgIn-LDHs) and nickel aluminum indium-lactate dehydrogenase (NiAlIn-LDHs) is selected as a precursor, and the hydrotalcite is slowly heated and reduced at a low temperature to prepare the loaded Ni-In intermetallic compound catalyst. The prepared loaded Ni-In intermetallic compound catalyst is adjustable in variety, controllable in granularity, good in dispersion property, high in hydrogenation selectivity, good in heat stability and adjustable in hydrogenation activity and selectivity for different alpha, beta-unsaturated aldehydes. The preparation method has a simple equipment process and high yield and is convenient for the industrialized production. The catalyst is used for catalyzing selective hydrogenation of different alpha, beta-unsaturated aldehydes to produce unsaturated enol, the conversion rate of reactants is high, the selectivity of products is high, and the yield of the unsaturated enol can reach more than 95 percent.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a catalyst for preparing a supported Ni-In intermetallic compound by using hydrotalcite as a precursor and using it for catalyzing the selective hydrogenation reaction of α, β-unsaturated aldehydes. Background technique [0002] The selective hydrogenation of unsaturated aldehydes / ketones (α,β-unsaturated aldehydes) has important applications in the field of fine chemical catalysis and has attracted extensive attention in the scientific community this year. Although traditional transition metal hydrogenation catalysts (such as: Ru, Pt, Rh, Cu, and Ni, etc.) have good catalytic activity, their selectivity for the formation of unsaturated alcohols is often not high. Existing studies have shown that due to kinetic and thermodynamic reasons, these catalysts are more conducive to the addition of C=C double bonds, which are not conducive to the addition of C=O ...

AI Technical Summary

Problems solved by technology

However, because some components (such as Sn, Ga, or In) that make up intermetallic compounds are difficult to reduce, it is difficult to prepare small particle size and highly dispersed intermetallic compound catalysts.

This severely restricts the catalytic performance of intermetallic compounds, so how to prepare new highly dispersed intermetallic compounds is a big problem

Images