A method for reducing and carbonylating methanol to produce acetaldehyde, ethanol and ethyl acetate

Through the use of carbon-supported dual-active nanoalloy particle catalyst, the high reaction pressure and corrosiveness problems in the existing methanol reduction carbonylation process are solved, and the efficient reaction of methanol to directly produce acetaldehyde, ethanol and ethyl acetate is achieved in one step, with good catalytic performance and stability.

CN114524719BActive Publication Date: 2025-03-18DALIAN INSTITUTE OF CHEMICAL PHYSICS CHINESE ACADEMY OF SCIENCES
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Patent Information

Application Number
CN202011322345.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2020-11-23
Publication Date
2025-03-18
Estimated Expiration
2040-11-23

AI Technical Summary

Technical Problem

The existing process of reducing carbonylation of methanol to produce acetaldehyde, ethanol and ethyl acetate has high reaction pressure and corrosiveness, which limits its industrial applications.

Method used

Carbon-supported biactive-site nanoalloy particles are used as catalysts, and metal atomic dispersion is achieved through heat treatment of halogen-containing products such as CO and CH3I, and a bimetallic active site catalyst with methanol carbonylation activity and hydrogenation reaction activity is prepared.

Benefits of technology

It realizes the efficient reaction of methanol to directly produce acetaldehyde, ethanol and ethyl acetate in one step. The catalyst has the advantages of good reactivity, strong stability, uniform dispersion, adjustable loading, and no loss of precious metals.

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Abstract

The present application discloses a method for preparing acetaldehyde, ethanol and ethyl acetate by reducing carbonylation of methanol, wherein CO, CH3OH, CH3I and H2 are used as reaction raw materials, and methanol reduction carbonylation reaction is carried out in the presence of one or two of carbonylation active metals Rh or Ir and one or more of hydrogenation active metals Ru, Pd, Pt and Au, and under certain conditions, methanol can be directly prepared into acetaldehyde, ethanol and ethyl acetate. It is characterized in that the method requires the use of atomically dispersed metals (Rh or Ir atoms) with carbonylation activity, and atomically dispersed another single atom of hydrogenation active metals (Ru, Pd, Pt, Au), and both metals in the catalyst are atomically dispersed on the surface of a carbon carrier in the form of a mononuclear complex of a carbonyl halide. Under the action of a double active site single atom catalyst supported by the carbon carrier and under certain reaction conditions, the application of methanol directly preparing acetaldehyde, ethanol and ethyl acetate in one step can be realized in the reduction carbonylation of methanol.
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