A novel ZrO2–SO42− supported palladium catalyst for syntheses of disubstituted ureas from amines by oxidative carbonylation

✍ Scribed by Feng Shi; Youquan Deng; Tianlong SiMa; Hongzhou Yang

• Publisher: Elsevier Science
• Year: 2001
• Tongue: French
• Weight: 98 KB
• Volume: 42
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/s0040-4039(01)00124-1

✦ Synopsis

The syntheses of disubstituted ureas by carbonylation of a series of amines in the presence of a sulfate modified zirconia supported palladium catalyst was investigated at an initial total pressure of 4.0 MPa and 135°C. High conversions and yields were achieved for the synthesis of symmetric dialkylureas. This supported catalyst could also be easily separated and recovered after reaction.