The process for synthesizing ammonia developed by the German chemist Fritz Haber. Ammonia is produced by reacting nitrogen and hydrogen at a high temperature and pressure using a catalyst.

an industrial process for producing ammonia from nitrogen and hydrogen by combining them under high pressure in the present of an iron catalyst

A process for the catalyzed industrial production of ammonia from N2 and H2 at high temperature and pressure.

The industrial process used to make NH3 from N2 and H2.