Process for the manufacture of ammonium sulfamate

摘要

A process for the manufacture of ammonium sulfamate by introducing under pressure ammonia and sulfur trioxide into a reactor containing a melt which mainly consists of ammonium sulfamate and ammonium imidodisulfonate, while maintaining a molar ratio of NH3/SO3 of from 1.5 to 1 to 2.0:1, which comprises introducing sulfur trioxide into the gas phase above the melt.