2030.     LACHINOV, S. S., VVEDENSKII, A. A., AND TELEGIN, V. G.  [Reduction of Iron Catalysts Used in the Synthesis of Ammonia.  II.  Influence of the Reduction Conditions on the Activity of the Catalyst.]  Jour. Appl. Chem. (U.S.S.R.), vol. 10, 1937, pp. 435-455 (in German, p. 456); Chem. Abs., vol. 31, 1937, p. 7201.

        High reduction temperature of the “GIVD-L-L” catalyst (containing FeO, 21.90; Fe₂O₃, 71.48; K₂O, 1.90; Al₂O₃, 4.05; SiO₂, 0.10; MnO, 0.41; S, 0.03; and P, 0.01%) at constant pressure and volume velocity, has a negative influence on the activity of the catalyst.  The volume velocity of the H₂-N₂ mixture has a positive influence on the activity of the catalyst.  The pressure (within 1-300 atm.) has only slight negative influence upon the activity of the catalyst, which can be neutralized by corresponding increase of the volume velocity.  A method of reduction of the catalyst was worked out, consisting of a stepwise increase of the temperature from 360°-500°, keeping the catalyst at 360°, 380°, 400°, 425°, 450°, 475°, and 500° for complete separation of H₂O at each temperature, and maintaining the highest possible partial pressure of H₂ and the best H₂O vapor condensation.  Further investigation is required for improvement of the method.