Process for the preparation of cinnamyl alcohol by hydrogenation of cinnamaldehyde

By using alginate as a carbon source to prepare a biomass carbon-supported cobalt-based catalyst, the problems of complex preparation and high cost in the existing technology were solved, and the effect of highly selectively generating cinnamyl alcohol in the hydrogenation reaction of cinnamaldehyde was achieved.

CN122102839APending Publication Date: 2026-05-29DALIAN INSTITUTE OF CHEMICAL PHYSICS CHINESE ACADEMY OF SCIENCES
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DALIAN INSTITUTE OF CHEMICAL PHYSICS CHINESE ACADEMY OF SCIENCES
Filing Date
2024-11-28
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing methods for preparing carbon-supported cobalt-based catalysts are cumbersome and costly, and the selectivity of cinnamyl alcohol in the hydrogenation reaction of cinnamaldehyde is low. Therefore, it is necessary to develop a simple and inexpensive preparation method to improve catalytic activity and selectivity.

Method used

Using alginate as a carbon source, a cobalt-based catalyst was prepared by forming gel spheres through the dropwise addition of cobalt salt solution, followed by freeze-drying and carbonization. Isopropanol was then used as a hydrogen donor for the hydrogenation reaction of cinnamaldehyde.

Benefits of technology

The catalyst was prepared efficiently and produced with high selectivity for cinnamyl alcohol. The catalyst preparation process was simple and inexpensive, and it exhibited excellent catalytic activity and cinnamyl alcohol selectivity in the presence of isopropanol.

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Abstract

The application discloses a method for preparing cinnamyl alcohol by hydrogenating cinnamyl aldehyde. The method comprises the following steps: in a reactor, under a non-active gas atmosphere, mixing isopropanol with cinnamyl aldehyde, and contacting the mixture with a catalyst to obtain cinnamyl alcohol by reaction; the catalyst is composed of a carrier and cobalt particles loaded on the surface of the carrier; the size of the cobalt particles is 2-30 nm, and the cobalt particles are highly dispersed; and the loading amount of the cobalt particles in the catalyst is 30-70 wt%. The biomass alginate with low price is used as a carbon source, and the preparation method is simple and easy to implement. The catalyst has the advantages of high Co loading amount, small Co particle size and high dispersion, and exhibits good catalytic activity and cinnamyl alcohol selectivity in the selective hydrogenation reaction of cinnamyl aldehyde.
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