In recent days, a research team led by Professor Kong Qingchi from China University of Fuels (East China) has successfully developed a new production process for brominated triazine, specifically tris(tribromobenzene-oxygen-based)-cyanurate. This innovation aims to address key challenges in traditional manufacturing methods.
Currently, the industry relies on materials such as tribromophenol, cyanuric chloride, and sodium hydrogen oxyhydroxide. However, tribromophenol is known for its hygroscopic nature and sublimation properties, making it difficult to dry efficiently. As a result, significant material loss occurs during the drying phase, increasing both cost and complexity in production. To overcome these issues, the newly developed method eliminates the need for tribromophenol altogether by directly combining phenol with cyanuric chloride to form tris(tribromobenzene-oxygen-based)-cyanurate.
This approach simplifies the entire synthesis process, which takes place entirely within a single reaction vessel. By avoiding the high-purity purification, isolation, and drying steps typically required for intermediate products, the technology significantly reduces energy consumption and streamlines the overall workflow.
The process begins with dissolving phenol in a chlorobenzene solvent, followed by the addition of anhydrous aluminum trichloride as a catalyst. Cyanuric chloride is then introduced, allowing the formation of tris(phenoxy-based)-cyanurate. After reducing the temperature and adding water, bromine is used as the brominating agent. The resulting mixture undergoes washing, distillation, crystallization, centrifugation, and drying to produce the final product: tris(tribromophenoxy-oxygen-based)-cyanuric ester.
By bypassing the synthesis and purification of tribromophenol, this method not only improves efficiency but also enhances safety and environmental sustainability. The entire procedure is carried out in a controlled reactor environment, eliminating the need for complex intermediate handling.
Tris(tribromobenzene-oxygen-based)-trimeric-isocyanate is recognized as a highly effective flame retardant, with excellent thermal stability and fire resistance. It has attracted considerable attention from researchers both domestically and internationally, who continue to explore improved synthetic techniques to enhance performance and reduce production costs. This breakthrough represents a significant step forward in the development of safer and more sustainable flame-retardant materials.
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