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The patent EP3814320 was granted to Eurotecnica Melamine on Dec 6, 2023. The application was filed on Jun 28, 2019 under application number EP19753195A. The patent is currently recorded with a legal status of "Granted And Under Opposition".
A process for converting anhydrous off-gases from melamine synthesis into urea, eliminating the need for separate urea plants. The process involves isobaric cooling, transformation into ammonium carbamate, isothermal pressurization, and isobaric heating to produce urea. The process can be integrated into the melamine plant, enabling direct recycling of the produced urea back to the melamine synthesis reactor.

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