61.      ---------------. [ANTHEAUME, J.] [Iron Oxide Catalysts for the Hydrogenation of Carbon Monoxide Under Atmospheric Pressure.]  Ann. combust. liquides, vol. 10, 1935, pp. 472-507; Chem. Abs., vol. 29, 1935, p. 6396.

                Catalysts are prepared by coprecipitating equimolar mixtures of Fe and Ca nitrates with NaOH, washing until pH=7.4, mixing with 2% K₂CO₃, granulating, drying, and reducing with H₂ at 250°.  Hydrogenation is carried out at 250° under 1 atm. on the mixture CO+1.75 H₂.  The weight of liquid hydrocarbons formed decreases rapidly as the rate of flow is increased.  Oxidation of the catalyst, followed by H₂ reduction, does not affect its activity.  A powdered catalyst, 1 precipitated by NH₃ instead of NaOH and 1 precipitated on kieselguhr, showed very poor activity.  Omitting the K₂CO₃ or washing the catalyst electrolytically increases its activity materially.  Catalysts containing less Cu are more active but lose their activity after a few days.  Samples of catalyst are withdrawn without contact with air, and their powder X-ray diagrams and magnetic properties are determined.  These indicate the absence of Fe and the presence of Fe₂O₃ and Fe₃O₄ probably in solid solution.  In the absence of Cu, no Fe₃O₄ is present in catalysts reduced at 250°.  The catalysts absorb an appreciable amount of hydrocarbons, but this does not seem to affect their activity.

                  -----------------.  See abs. 678.