627-12-3

71-23-8

57-13-6

627-12-3

623-96-1

1. Catalyst preparation: The catalyst was prepared by calcining La(NO3)3-6H2O in air at 350 °C for 4 hours. 2. Preparation of reactants: 48.0 g of n-propanol, 6.0 g of urea, and 0.8 g (13.3% of the mass of urea) of the above-prepared catalyst were added to the autoclave. 3. Reaction conditions: The reaction was carried out at 180 °C for 6 h under autogenous pressure (ca. 12.2 atm). 4. 4. Product analysis: At the end of the reaction, the yields of dipropyl carbonate (DPC) and propyl carbamate (PC) were 54.2% by weight and 18.3% by weight, respectively.