Nitriles are hydrogenated to primary amines over an activated, alpha-Al
2
O
3
-containing, macroporous Raney catalyst based on an alloy of aluminum and at least one transition metal selected from the group consisting of iron, cobalt and nickel, and, if desired, one or more further transition metals selected from the group consisting of titanium, zirconium, chromium and manganese, which is obtainable by a process comprising the steps in the order (a)-(f):
(a) preparing a kneadable composition comprising the alloy, a shaping aid, water and a pore former;
(b) shaping the kneadable composition to form a shaped body;
(c) calcining the shaped body;
(d) activating the calcined shaped body by treatment with aqueous alkali metal hydroxide solution;
(e) rinsing the shaped catalyst body with aqueous alkali metal hydroxide solution;
(f) rinsing the shaped catalyst body with water.
腈类化合物在一种活性α-
Al2O3多孔Raney催化剂上加氢,可以得到初级胺。该催化剂基于铝和
铁、
钴和
镍中至少一种过渡
金属的合
金,并且如果需要,还可以选择一种或多种从
钛、
锆、
铬和
锰中选择的进一步过渡
金属。该催化剂是通过以下步骤按顺序(a)-(f)获得的:(a)制备可揉捏的混合物,包括合
金、成型助剂、
水和孔形成剂;(b)成型可揉捏的混合物以形成成型体;(c)煅烧成型体;(d)用
水溶性碱
金属氢氧化物处理激活煅烧后的成型体;(e)用
水溶性碱
金属氢氧化物洗涤成型催化剂体;(f)用
水冲洗成型催化剂体。