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Return to Abstracts of Patents Return to Abstracts of Patents 750-999 Patent Abstracts765. ------. [GAMBURG, D. Y.] [Iron Catalyst for Ammonia Synthesis.] Russian Patent 54,406. Jan. 31, 1939. Chem. Abs., vol. 35, 1941, p. 3046. a-Fe obtained by reduction of magnetite is repeatedly oxidized with steam, and the Fe2O3 formed is reduced with H2 at not above 450º to form crystals not larger than 10-5 to 10-6 cm. |