ammonia; hydrogen; catalyst obtained by prereduction from precursor whose catalytically active composition before the reduction with hydrogen comprised 13percent by weight of Cu, calculated as CuO, 28percent by weight of NI, calculated as NiO, 28percent by weight of Co, calculated as CoO and 31percent by weight of Zr, calculated as ZrO2 in water T=250°C; P=37503.8 - 225023 Torr; Autoclave; Product distribution / selectivity;
