Ammonia synthesis processes are disclosed which provide enhanced conversion of hydrogen values to ammonia. In the processes, a purge stream from an ammonia synthesis loop, which purge stream contains ammonia, is contacted at a superatmospheric pressure with the feed side of a separation membrane which...http://www.google.es/patents/US4180553?utm_source=gb-gplus-sharePatente US4180553 - Process for hydrogen recovery from ammonia purge gases
Process for hydrogen recovery from ammonia purge gases
