the bottom of the first reactor wherein the temperature was maintained at 20 u00b0 to 30 u00b0 c room temperature and the pressure was approx 50 bar once the reaction mixture had passed through the first reactor it was heated to 120 u00b0 c and introduced into the second reactor together with liquid ammonia 150 ml h and hydrogen 200 l h in the second reactor the temperature was 120 u00b0 c and the pressure was 200 bar once the mixture had passed through the second reactor excess ammonia was removed from the reaction mixture by distillation 41 g per hour of a product were obtained which contained 33 5 wt of 2 methyl 2 4 diaminopentane yield 65 of theoretical the process was the same as in example 1 the first reactor was charged with 200 cm 3 of a catalyst which contained 17 wt of al 2 o 3 on silica gel as the catalyst the second reactor was filled with 200 cm 3 of a catalyst which contained 46 wt of nickel and 17 wt of copper on chromium oxide the catalyst in the second reactor was reduced with hydrogen acetone and liquid ammonia were then each introduced at a rate of 10 ml h into the bottom of the first reactor.