Patent ID: 6809222
Filing Date: 2004-10-26
Classification: C07C,Y02P

Abstract:
A process for the production of aliphatic amines by ammonia addition to alkenes in gaseous phase, catalyzed by homogeneous or heterogeneous catalysts, wherein the process is conducted in a synthesis system comprising two sections, a first reactive section and a second separative section which are mutually interconnected and dependent, and of one cooling zone working at practically the same pressure of from about 2 to about 8 MPa, and wherein the first reactive section contains a catalyst and the second separative section is equipped with built-in packing for intensification of mutual counterflow contact of liquid and gaseous phases, and wherein the process comprises permitting ammonia and alkene to enter into the reactive section containing catalyst and permitting the alkene to partially react with ammonia to form amine, permitting the reactive mixture to leave the reactive section and enter the cooling zone, and after being cooled in the cooling zone to enter the separative section where amine concentrate is separated from the reactive mixture, and amine concentrate is permitted to leave a heated bottom portion of the separative section, and this amine concentrate is then permitted to be further refined, and unreacted mixture of alkenes and ammonia is recycled in gaseous form from a condenser in this section back into the reactive section along with fresh ammonia and alkene reactants.