Continuous cross-aldol condensation of linear aldehydes using solid supported basic catalyst and polar co-solvent

By using a combination of solid-supported alkaline catalyst and polar cosolvent, the problems of low selectivity and low yield in the traditional cross-aldol condensation method were solved, achieving efficient production of branched aldehyde products and reducing production costs.

CN121443575APending Publication Date: 2026-01-30DOW GLOBAL TECHNOLOGIES LLC
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Patent Information

Application Number
CN202480044916.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2023-08-04
Filing Date
2024-07-31
Publication Date
2026-01-30

AI Technical Summary

Technical Problem

In existing cross-aldol condensation methods, traditional catalysts have poor product selectivity and require the removal of the aqueous phase composition, which leads to increased costs and more by-products, making it difficult to improve the selectivity and yield of cross-aldol products.

Method used

By employing a solid-supported alkaline catalyst and a polar cosolvent, a cross-aldol condensation reaction is carried out. The combination of the solid-supported alkaline catalyst and the polar cosolvent reduces catalyst deactivation, improves reaction selectivity and conversion rate, and produces branched aldehyde products.

Benefits of technology

This method achieves highly selective and high-yield cross-aldol condensation, reduces the need for catalyst deactivation and aqueous phase compositions, lowers production costs, and improves reaction efficiency.

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Abstract

A method for cross-aldol condensation of alkyl aldehydes includes providing a reactant mixture comprising a first alkyl aldehyde, a second alkyl aldehyde, and a polar co-solvent, the first alkyl aldehyde having a lower carbon number than the second alkyl aldehyde, and the feedstock having a molar ratio of the first alkyl aldehyde to the second alkyl aldehyde of 1: 1 or greater; and contacting the reactant mixture with a solid supported basic catalyst in a reactor; the reactor is operated to produce a product mixture containing a cross-aldol product of a first alkyl aldehyde and a second alkyl aldehyde.
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