Light olefin and method for preparing low-carbon carboxylic acid by alcohol carbonylation of light olefin

By using acidic molecular sieve catalysts to catalyze the reaction of low-carbon olefins with carbon monoxide and water, the problems of high temperature and pressure, strong equipment corrosion, and difficult product separation in the production of propionic acid and isobutyric acid in the existing technology have been solved, realizing the low-cost and environmentally friendly preparation of low-carbon carboxylic acids.

WO2026102605A1PCT designated stage Publication Date: 2026-05-21DALIAN INSTITUTE OF CHEMICAL PHYSICS CHINESE ACADEMY OF SCIENCES
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
DALIAN INSTITUTE OF CHEMICAL PHYSICS CHINESE ACADEMY OF SCIENCES
Filing Date
2024-11-13
Publication Date
2026-05-21

AI Technical Summary

Technical Problem

Existing technologies for the production of propionic acid and isobutyric acid suffer from problems such as high temperature and pressure, strong equipment corrosion, difficulty in product separation, high cost of precious metal catalysts, serious carbon buildup, and large amounts of waste emissions.

Method used

By using an acidic molecular sieve catalyst, low-carbon olefins and their alcohols react with carbon monoxide and water to produce low-carbon carboxylic acids. This avoids the use of precious metal catalysts, reduces corrosiveness and the difficulty of product separation, and also reduces the emission of waste.

Benefits of technology

It enables the efficient preparation of propionic acid and isobutyric acid under relatively mild conditions, reduces equipment requirements and production costs, simplifies the product separation process, and is suitable for large-scale industrial production.

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Abstract

The present application relates to the field of catalytic chemistry, and discloses light olefin and a method for preparing a low-carbon carboxylic acid by alcohol carbonylation of light olefin. The method comprises: enabling starting materials including light olefin, an alcohol thereof and carbon monoxide to react in a reactor loaded with an acidic molecular sieve catalyst, so as to obtain a product containing a low-carbon carboxylic acid, wherein the light olefin and the alcohol thereof are at least one selected from ethylene, propylene, ethanol, n-propanol, and islpropanol. In the method, an acidic molecular sieve is used as a catalyst, a noble metal catalyst is not needed, the system shows low corrosiveness, the product is easily separated, the emissions of waste gas, wastewater, and solid waste are reduced, the engineering of a fixed-bed process is easy, and the method is suitable for single-set large-scale production.
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