A self-selective in-situ synthesis of amorphous zirconia and its application in the transfer hydrogenation of cinnamaldehyde to prepare cinnamyl alcohol

Abstract

The invention discloses a method for preparing self-selected in-situ synthesized amorphous zirconia and its application in the transfer hydrogenation of cinnamaldehyde to prepare cinnamyl alcohol. The present invention adopts the self-selective in-situ synthesis method to obtain amorphous zirconia, and then uses it in the preparation of cinnamyl alcohol by transfer hydrogenation of cinnamaldehyde, which can prepare cinnamyl alcohol with high conversion rate and high selectivity; the raw materials used are low in price, and non- Noble metals have a short preparation period, which solves the problem of complex catalyst screening process and solves the problem of low activity of non-noble metal catalysts, and has good cycle stability. The present invention reduces the complex process of catalyst screening by self-selecting in-situ synthesis of catalysts, and is simpler than the preparation process of supported catalysts and saves costs.

Description

A kind of preparation method of self-selected in-situ synthesis of amorphous zirconia and its use in cinnamon Application of Aldehyde Transfer Hydrogenation in Preparation of Cinnamyl Alcohol technical field The present invention relates to the preparation method of cinnamyl alcohol, particularly a kind of self-selecting in-situ synthesis of amorphous zirconia. A preparation method and its application in the preparation of cinnamyl alcohol by transfer hydrogenation of cinnamaldehyde. Background technique [0002] α,β-unsaturated aldehydes are important chemical raw materials and intermediates. Cinnamaldehyde is a typical representative of α,β-unsaturated aldehyde, The hydrogenation of its conjugated double bonds C=C and C=O has received extensive attention. Selective hydrogenation of C=O yields cinnamyl alcohol, which is a medicinal It is an important raw material and intermediate for the preparation of HIV and other drugs, and the selective hydrogenation of C=C obta...

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Problems solved by technology

[0006] (1) C=C and C=O in cinnamaldehyde form a conjugated system, and its selective hydrogenation is a relatively difficult process; (2) obtaining cinnamyl alcohol with high conversion rate and high selectivity has certain difficulties; (3) The process of screening catalysts is too cumbersome to find suitable catalysts; (4) the use of noble metal catalysts is costly, and non-noble metal catalysts are used, and conversion and selectivity cannot be improved at the same time; (5) the catalyst preparation process is complicated and consumes Can be big;

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