反应详情

温度

130 °C

A mixture of 918 parts of hexyl alcohol, 300 parts of urea and 14 parts of a cation exchanger which is commercially available under the registered name Amberlite 200 and, having been treated in accordance with Example (1 a), contains nickel, is heated to 130° C. whilst stirring. The temperature is then raised to 150° C. in the course of 6 hours and maintained thereat for a further 4 hours. After filtering off the exchanger, excess hexyl alcohol is distilled off under reduced pressure. 680 parts of hexyl carbamate (94% of theory) are obtained. Melting point= 56°-57° C.

1. temperatureThe temperature is then raised to 150° C. in the course of 6 hours
2. temperaturemaintained
3. filtrationAfter filtering off the exchanger, excess hexyl alcohol
4. distillationis distilled off under reduced pressure