A device for synthesizing ethylene carbonate and a method for synthesizing ethylene carbonate

CN122256996APending Publication Date: 2026-06-23NINGXIA UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NINGXIA UNIVERSITY
Filing Date
2026-03-25
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Existing ethylene carbonate synthesis processes are energy-intensive, have stringent equipment requirements, and are costly, and fail to effectively utilize CO2 resources. Traditional membrane electrolysis methods suffer from high costs, short lifespans, and ohmic resistance issues.

Method used

A membrane-free flow electrolyzer is used, and the electrolyte is circulated between the anode and cathode by a peristaltic pump. Combining electrochemical reaction and liquid-phase series reaction, WO3 electrode loaded with carbon cloth and nickel foam cathode are used to generate Br2/HBrO and react with C2H4 to form ethylene carbonate. A Cr(OH)3 shielding film is generated on the cathode surface to suppress side reactions. Micron-sized sieve plates are added to the electrolyte pool to optimize gas-liquid mass transfer.

Benefits of technology

This method enables the efficient synthesis of ethylene carbonate at room temperature and pressure, reducing system costs, improving electrolysis efficiency and stability, simplifying equipment design, optimizing gas-liquid mass transfer efficiency, and making it suitable for renewable energy system integration.

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Abstract

This invention discloses a synthesis apparatus and method for ethylene carbonate, belonging to the field of electrochemical synthesis technology. The synthesis apparatus includes an electrolytic cell, an electrolyte tank, and a peristaltic pump; the peristaltic pump connects the electrolytic cell and the electrolyte tank; the electrolytic cell is equipped with an anode, a cathode, a sieve plate, and inlets and outlets for gas and electrolyte. The synthesis method specifically includes the following steps: CO2 and C2H4 are introduced into the electrolytic cell through the gas inlet; the electrolysis potential is set; the peristaltic pump is turned on to circulate the electrolyte and initiate the electrolytic reaction; Br oxidation occurs at the anode to generate Br2; hydrogen evolution occurs at the cathode to generate H2 and OH; Br2 disproportionates to generate HBrO; HBrO reacts with C2H4 to generate 2-bromoethanol; 2-bromoethanol, CO2, and OH react to form ethylene carbonate, Br, and H2O. This invention can synthesize ethylene carbonate in a membrane-free system using C2H4 and CO2 as raw materials at ambient temperature and pressure, improving ion conductivity, reducing internal resistance, and enhancing electrolysis efficiency, achieving high-efficiency synthesis of ethylene carbonate in a membrane-free electrolytic cell.
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