1982. ------. [LACHINOV, S. S.] [Iron Catalyst for Ammonia Synthesis.] Russian Patent 52,409, Jan. 31, 1938. Chem. Abs., vol. 34, 1940, p. 3890.

Fe or its oxides or both are fused in an oxidizing atmosphere with activators, and the temperature is increased to the melting point of the activators.