841. GREATHOUSE, L. H. Catalyst for Ammonia Synthesis. United States Patent 1,618,004. Feb. 15, 1927. Chem. Abs., vol. 21, 1927. p. 1168.

Patent Abstracts

Catalyst is prepared by mixing substances such as Fe₂O₂ (or MnO₂) and Al, and after effecting fusion by exothermic reaction, subjecting the material to reduction, for example, by H₂ in the catalytic chamber.