| 摘要 |
<p>A process is described (and related reactors) for the high-yield synthesis of urea from ammonia and carbon dioxide fed pure to a "once through" reactor, i.e. without any recycling, operating at high pressure and temperature, characterized by the fact that the pure ammonia is fed to the reaction space by being first circulated substantially over all the internal wall or reactor shell, the temperature of said ammonia and its circulation being such as to: a) cool said reactor shell in such a way that it no longer requires costly material lining; and b) not to affect appreciably the reaction. <IMAGE></p> |
