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Return to Abstracts of Literature 1750-1999

Literature Abstracts

 1897.    MURATA, Y., YOSHIOKA, Y., OJI, G., AND SAITO, S.  Synthesis of Benzine From Carbon Monoxide and Hydrogen.  LXI.  Reaction Temperature and Durability of Iron Catalysts.  Jour. Soc. Chem. Ind. (Japan), vol. 45, 1942, pp. 1271-1286; Chem. Abs., vol. 43, 1949, p. 2400.

        Durability of Fe catalysts on the composition Fe : Cu : Mn : kieselguhr : H₃BO₃ : K₂CO₃ = 100 : 25 : 2 :125:x:y, where x=0 or 20 and y=1, 2, 3 or 4 in powdered form, and x=20 and y=4 in tablet form, used in the Fischer synthesis with a gas mixture (CO:H₂=1:1) at 200°-270° was studied.  The optimum value of y is 2 to 4 when x=0 or 20, respectively, regardless of the reaction temperature, and an increase in increase in y diminishes the durability of the catalyst.  The promoting effect of H₃BO₃ is not noticeable below 220°, and the optimum reaction temperature is not affected by the addition of H₃BO₃.  On the whole an Fe catalyst is active at 230°-260°, and its durability can be greatly increased by choosing a lower reaction temperature.  The optimum reaction temperature can be lowered more when the catalyst is used in the form of tablets than when used in powdered form, probably because of the rise in temperature of the catalyst layer.  The lower the activity of the catalyst, the higher is its durability.