Process method and device for synthesizing propionate through hydrogen esterification of ethylene

By integrating a novel catalytic system combining phosphine ligands and palladium catalysts with a material recycling process, the problem of low catalytic efficiency in ethylene hydrogen esterification has been solved, enabling the preparation of propionate esters at high efficiency and low cost, with environmentally friendly industrial production characteristics.

CN121824307APending Publication Date: 2026-04-10SHANGHAI INST OF ORGANIC CHEM CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-29
Publication Date
2026-04-10

AI Technical Summary

Technical Problem

Existing ethylene hydrogen esterification catalytic systems suffer from low catalytic efficiency, poor selectivity, and high cost, making them difficult to implement in industrial applications.

Method used

A novel catalytic system combining phosphine ligands and palladium catalysts was adopted, and the synthesis of propionate by hydrogen esterification of ethylene was achieved through material recycling and process integration, including the organic combination of reaction, separation and distillation units.

Benefits of technology

It improves catalytic efficiency and selectivity, reduces costs, and enables the efficient preparation of propionate esters, offering advantages for environmentally friendly industrial production.

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Abstract

The invention discloses a process method and device for synthesizing methyl propionate through ethylene hydrogen esterification. The process comprises the steps of reaction, separation and rectification, and the device mainly comprises a synthesis reactor, a separation tank and a rectification tower which are connected in sequence. In a synthesis reactor, ethylene, carbon monoxide and methanol are subjected to a hydrogen esterification reaction under the action of a catalyst; after the reaction, separating out unreacted ethylene, carbon monoxide and a catalyst-containing material through a separation tank and an evaporation tank, and respectively returning to the reactor through a circulating pipeline for reuse; and feeding a gas-phase product into a rectifying tower, returning the separated methanol to the reaction system, and outputting methyl propionate as a product. The method is high in atom economy, sufficient in raw material utilization rate, low in three-waste emission, green and efficient in process, high in product purity and low in production cost.
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Citation Information

Patent Citations

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