Method for efficiently synthesizing cyanuric acid

CN122233996APending Publication Date: 2026-06-19SHANDONG WO LAN BIOLOGICAL GRP CO LTD
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Patent Information

Application Number
CN202610423709.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-01
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing cyanuric acid synthesis processes suffer from high energy consumption, numerous byproducts, low product purity, and easy catalyst loss, especially in high-temperature steam and ammonia environments where mass transfer efficiency is low and catalyst stability is poor.

Method used

A phosphotungstic acid-confined three-dimensional ordered macroporous alumina solid acid catalyst is used. By precisely anchoring the phosphotungstic acid active centers on the three-dimensional ordered macroporous alumina support, a macro-mesoscopic hierarchical pore structure is constructed, providing a rapid diffusion path and preventing the loss of active components through chemical anchoring. This is combined with mild reaction conditions and a simple separation process.

Benefits of technology

It significantly improves the reaction rate and selectivity of cyanuric acid, reduces energy consumption, increases product purity and catalyst life, and realizes a green and low-cost synthesis process. The catalyst and solvent can be recycled, reducing the generation of waste and waste liquid.

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Abstract

This invention discloses a highly efficient method for synthesizing cyanuric acid in the field of green chemistry and chemical engineering. The method uses urea as a raw material and reacts it in a decahydronaphthalene solvent under the catalysis of a phosphotungstic acid-confined three-dimensional ordered macroporous alumina solid acid catalyst. Specifically, urea, solvent, and catalyst are mixed and heated under nitrogen protection. After cooling, filtration, and solvent washing, the resulting filter cake is separated from the crude product by stirring with hot water. The separated catalyst is dried and can be recycled. The filtrate containing the product is cooled, crystallized, filtered, washed, and dried to obtain high-purity cyanuric acid. The catalyst used in this method is prepared using a template method and confinement technology, exhibiting a stable structure and significantly inhibiting the loss of active components. This invention features a simple and efficient process, easy catalyst recovery and recycling, and high product yield and purity, demonstrating promising prospects for industrial application.
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