1267.    GRINEVICH, V. M. AND KLAPCHUK, S. V.  [Utilization of the Krivoi-Rog Hematite as a Raw Material for the Ammonia Catalyst.]  Jour. Appl. Chem. (U.S.S.R.), vol. 10, 1937, pp. 1868-1870; Chem. Abs., vol. 32, 1938, p. 2298.

       Hematite described contains Fe₂O₃ 96.70, FeO 0.53, Al₂O₃ 0.90, Mn₃O₄ traces, SiO₂ 1.60, CaO 0.09, MgO 0.05, S (sulfide) 0.004, S (sulfate) 0.02, and P₂O₃ 0.04%.  The preparation of catalyst is schematically described.  3 refs.