Supported nano Au catalyst for preparing crotyl alcohol and preparation method thereof

Abstract

The invention belongs to the chemical technical field and particularly relates to a supported nano Au catalyst for preparing crotyl alcohol by crotonic aldehyde selective hydrogenation and a preparation method thereof. The catalyst is prepared by using mesoporous titanium dioxide microballoons having core-shell structures as the carrier and loading the active constituents, nano Au, to the titanium dioxide microballoons by the deposition-precipitation method. The catalyst has the characteristics that the active constituents are highly dispersed, and the mol ratio of the titanium dioxide to the active constituents is 23.0-305.7. Compared with the nano Au catalyst supported by the commercial titanium dioxide carrier P25, the Au/TiO2 microspherical catalyst shows higher selectivity of target products in the reaction of preparing crotyl alcohol by crotonic aldehyde selective hydrogenation, thereby having important industrial application value.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a supported nano-gold catalyst for preparing crotyl alcohol by selective hydrogenation of crotonaldehyde and a preparation method thereof. Background technique [0002] α, β-unsaturated aldehydes are selectively hydrogenated to α, β-unsaturated alcohols, which are important raw materials and reaction intermediates in the production of fragrances, pharmaceuticals and other fine chemical products, and are widely used in organic synthesis. Crotyl alcohol is a representative compound among α, β-unsaturated alcohols. It is a very important intermediate in organic synthesis, often used in the manufacture of n-butanol, n-butyraldehyde, rubber vulcanization accelerators, alcohol denaturants, tanning agents, herbicides and soil fumigants, etc. Dangerous warning agent. Therefore, the selective catalytic hydrogenation of crotonaldehyde to crotyl alcohol is of great e...

AI Technical Summary

Problems solved by technology

Existing work has shown that on most metal catalysts, the typical α,β-unsaturated aldehyde-crotonaldehyde-is more inclined to hydrogenate to butyraldehyde, and the selectivity of the target product crotyl alcohol is low

Catalysts with high selectivity to α, β-unsaturated alcohols still focus on catalysts based on noble metals (Pt, Ru, Pd), although their activity and selectivity are high, but they are expensive and not suitable for large-scale industrial production

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