Monoethanolamine was mixed with an aqueous solution of sodium hydroxide〔w(NaOH)=12%-18%〕 in the presence of an effective amount of modified Raney copper catalyst containing noble metals of chromium and germanium.The optimal conditions for the dehydrogenation reaction were temperature 150-180 ℃,pressure 08-12 MPa and reaction time 2-4 h.Experimental results indicated that the modifed Raney copper catalyst has far more activity and longer lifespan than normal Raney copper catalyst,as the average conversio...