1165.    ---------------.  [GAUKHMAN, S. S., AND ROITER, V. A.] [Comparative Characteristics of the Adsorptive and Catalytic Properties of Variously Prepared Synthetic Ammonia Iron Catalysts.]  Jour. Phys. Chem. (U.S.S.R.), vol. 13, 1939, pp. 593-599; Chem. Abs., vol. 34, 1940, p. 1543.

       Adsorption isotherms for H₂ and N₂ on 2 Fe catalysts promoted by 2% Al₂O₃ are given for temperatures 184°-425°.  Physical adsorption was found at 184°, 2 types of activated adsorption at 250°-425° on the sintered catalyst only.  For the NH₃ synthesis at 360°-385° the catalytic activity of the sintered catalyst was proportional to the activated adsorption.