A green synthesis method of cyanuric acid

By using zirconium-based metal-organic framework-montmorillonite heterostructure catalysts, urea decomposition and isocyanate trimerization were achieved under mild conditions, solving the problems of high energy consumption and environmental pollution in cyanuric acid production and realizing efficient, low-cost, and green synthesis.

CN122187753APending Publication Date: 2026-06-12SHANDONG WO LAN BIOLOGICAL GRP CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG WO LAN BIOLOGICAL GRP CO LTD
Filing Date
2026-03-13
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

Existing cyanuric acid production processes are energy-intensive, have poor selectivity, and cause environmental pollution. The use of traditional solvents leads to equipment corrosion and wastewater treatment problems, while ionic liquid catalysts are costly and difficult to recycle.

Method used

Using zirconium-based metal-organic framework-montmorillonite heterostructure inorganic modified material as a catalyst, urea decomposition and isocyanate trimerization are achieved under mild conditions through nano-confinment effect and active site design. The catalyst is then easily separated and regenerated after the reaction.

Benefits of technology

It significantly reduces reaction temperature and time, improves selectivity, simplifies the process, reduces environmental pollution, lowers costs, and achieves efficient and green synthesis.

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Abstract

The application discloses a cyanuric acid green synthesis method in the field of green chemistry and chemical technology; the method uses self-made zirconium metal organic framework montmorillonite heterostructure inorganic modified material as a catalyst, is mixed with urea, and then is subjected to a solvent-free solid phase condensation reaction in an inert atmosphere. After the reaction product is washed with hot water, is separated through filtration, and the filtrate is cooled and crystallized, cyanuric acid product is obtained, and the catalyst can be recycled after being recovered and regenerated. The zirconium metal organic framework montmorillonite heterostructure inorganic modified material is made through the following steps: modifying montmorillonite by silylating an amine group, coordinating a zirconium precursor, hydrothermally synthesizing a heterostructure, and stepwise heat treatment. The application has the advantages of simple process, significantly lower reaction temperature than traditional pyrolysis, efficient and recyclable catalyst, and realization of low-energy-consumption and environment-friendly synthesis of cyanuric acid.
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