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- W2383448045 abstract "The synthesis of N,N'-diphenylurea (DPU) from urea and aniline under atmospheric pressure without any catalyst and additional solvent was studied. The effects of reaction conditions and process intensification techniques on the yields of product DPU were investigated. Combining use of nitrogen gas flowing during reaction and vacuum evaporating after reaction, the yield of DPU reached 99.1% under optimum reaction conditions (reaction temperature 180℃, molar ratio of aniline/urea 5 and reaction time 1.5 h). The unreacted aniline could be recycled and reused. In addition, the reaction mechanism was also studied by means of HPLC analysis and proving experiment, it is ascertained that phenylurea is the major intermediate in the reaction." @default.
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- W2383448045 date "2008-06-20" @default.
- W2383448045 modified "2023-10-02" @default.
- W2383448045 title "Synthesis of N,N'-Diphenylurea from Urea and Aniline under Atmospheric Pressure without Catalyst" @default.
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