Synthesis method of dimethyl carbonate

The photoelectrochemical method converts carbon dioxide into dimethyl carbonate at room temperature and pressure, solving the problems of high energy consumption and high cost in existing technologies. This enables efficient, green, and simplified dimethyl carbonate synthesis, promoting the resource utilization and energy storage of carbon dioxide.

CN122279623APending Publication Date: 2026-06-26HUNAN UNIV +1
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Patent Information

Application Number
CN202610090244.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-23
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing dimethyl carbonate synthesis technologies suffer from high energy consumption, high cost, and low efficiency. In particular, the carbon dioxide conversion process requires high temperature and pressure as well as precious metal catalysts, and the carbon dioxide participation is low, making it difficult to achieve green and environmentally friendly high-efficiency conversion.

Method used

Using a photoelectrochemical method, carbon dioxide is passed into the cathode chamber of an electrolytic cell containing potassium bicarbonate electrolyte at room temperature and pressure to produce methanol through a photoelectrochemical reaction. Subsequently, a photoelectrochemical catalytic reaction is carried out in the anode chamber to form dimethyl carbonate. The catalysis is carried out using a copper-based alloy catalyst and an n-type semiconductor light absorber, combining the synergistic effect of light energy and electrical energy.

Benefits of technology

It achieves efficient conversion of carbon dioxide into dimethyl carbonate under mild conditions, reducing energy consumption, being environmentally friendly, simplifying the process, improving reaction rate and selectivity, and realizing the resource utilization and energy storage of carbon dioxide.

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Abstract

The invention provides a synthetic method of dimethyl carbonate, and belongs to the technical field of synthesis of carbonic ester compounds. The synthesis method does not need high-temperature and high-pressure conditions, can be carried out at normal temperature and normal pressure, and obviously reduces energy consumption and equipment requirements. By coupling reduction and oxidation reactions of photoelectrochemical carbon dioxide conversion, the synthesis energy barrier of dimethyl carbonate is reduced, and the energy utilization efficiency is improved. Greenhouse gas carbon dioxide is used as a main raw material, waste resource utilization is achieved, used energy is clean energy such as solar energy or electric energy, and pollution is avoided from the source. According to the method, the two steps of carbon dioxide conversion and dimethyl carbonate synthesis are coupled, so that the cyclic utilization of the reactant methanol in the system is realized, and the process flow is simplified. Light energy and electric energy are combined to generate a synergistic effect, and the reaction rate and the selectivity of dimethyl carbonate are improved.
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