CuInZnO x Process for the preparation of a composite metal oxide catalyst and use thereof

By preparing CuInZnOx composite metal oxide catalysts, the problems of high catalyst cost and complicated process in the existing technology were solved, and CO2 was efficiently converted into N-methylformamide with a yield of 57.8%, which simplified the preparation process and reduced the cost.

CN118253306BActive Publication Date: 2026-07-21PETROCHINA CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
PETROCHINA CO LTD
Filing Date
2022-12-26
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing technologies for synthesizing formamide involve expensive catalysts, complex preparation processes, and difficulties in using CO2 as a raw material, making it impossible to achieve economical and efficient conversion.

Method used

The CuInZnOx composite metal oxide catalyst was used to prepare the catalyst by co-precipitation, deposition-precipitation or oxalic acid gelation. N-methylformamide was synthesized in one step using inexpensive CO2 and hydrogen. The catalytic performance was optimized by controlling the metal ratio and calcination conditions.

Benefits of technology

The efficient conversion of CO2 to N-methylformamide was achieved, with a single reaction yield of 57.8%, which reduced catalyst costs, simplified the preparation process, and improved catalytic efficiency.

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Abstract

The application discloses CuInZnO x The application discloses a preparation method of a composite metal oxide catalyst, which comprises the following steps: dissolving indium salt, zinc salt and copper salt in deionized water to prepare a metal aqueous solution; adding an aqueous solution of a precipitant drop by drop under intense stirring, and then standing and aging; performing vacuum filtration, and then washing and drying the precipitate; and calcining the precipitate in a muffle furnace to obtain CuInZnO x The application discloses a composite metal oxide catalyst.The method solves the problems of high synthesis cost, low synthesis yield, harsh preparation conditions and difficulty in separation from products of the existing catalysts.The catalyst prepared by the method can effectively convert carbon dioxide into N-methyl formamide, and the yield of a single reaction reaches 57.8% under optimal reaction conditions.
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