Ternary high-copper-content CuxFeyCe0.5 metal oxide catalyst as well as preparation method and application thereof

The ternary high copper-containing CuxFeyCe0.5 metal oxide catalyst prepared by one-step co-precipitation method solves the problems of low conversion rate and high cost of catalyst aniline in the prior art, and achieves high selectivity and high efficiency of catalytic reaction of aniline and CO2. Conversion rate and recyclable characteristics, suitable for chemical synthesis of N,N'-diphenylurea.

CN119281340AActive Publication Date: 2025-01-10CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Application Number
CN202411315691.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-09-20
Publication Date
2025-01-10
Estimated Expiration
2044-09-20

AI Technical Summary

Technical Problem

In the prior art, the catalyst that catalyzes the reaction of aniline with CO2 to synthesize N,N’-diphenylurea has problems such as low conversion of aniline, high cost, difficulty in recycling and does not meet the requirements of sustainable chemicals.

Method used

A one-step co-precipitation method was used to prepare a ternary high copper-containing CuxFeyCe0.5 metal oxide catalyst. By placing a mixed solution of copper salt, iron salt and cerium nitrate hexahydrate and NaOH aqueous solution in Na2CO3 solution, the pH was adjusted and the calcined, and the A catalyst with high activity and stability is obtained.

Benefits of technology

It achieves high selectivity and conversion rate of catalytic reaction of aniline and CO2, and the efficiency and recyclability of the catalyst, which meets the requirements of green chemistry and has industrial application value.

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Abstract

The invention discloses a ternary high-copper-content CuxFeyCe0.5 metal oxide catalyst, a preparation method thereof and application of the ternary high-copper-content CuxFeyCe0.5 metal oxide catalyst in synthesis of N, N '-diphenylurea by catalyzing reaction of aniline and carbon dioxide. A one-step coprecipitation method is adopted, copper nitrate trihydrate, ferric nitrate nonahydrate and cerium nitrate hexahydrate are used as raw materials, the pH value is adjusted through sodium hydroxide in the presence of a sodium carbonate precipitator, the ternary high-copper-content CuxFeyCe0.5 metal oxide is prepared, the specific surface area is 36-77 m < 2 > / g, the copper-iron ratio is 4: 1-10: 1, and the crystallinity is 70-100%. The synthesis method is convenient to operate and good in reproducibility. Compared with the existing catalyst, the ternary high-copper-content CuxFeyCe0.5 metal oxide prepared by the preparation method disclosed by the invention can be used for catalyzing aniline and carbon dioxide to react to synthesize N, N-dimethyl formamide; in the N, N '-diphenylurea reaction process, the catalyst has higher catalytic activity and good reusability, the selectivity of the N, N'-diphenylurea prepared through catalysis reaches up to 99.9%, the aniline conversion rate reaches up to 32.9%, and the catalyst has good application prospects in the field of catalytic synthesis.
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Citation Information

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